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W-5
PROCUREMENT OF CIVIL WORKS
UNDER
NATIONAL SHOPPING PROCEDURES
(Construction of Shed for 3 TPD Composting Facilities at
Santoshinagar) (Package -5)
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INVITATION FOR QUOTATIONS FOR CONSTRUCTION OF
CIVIL WORKS UNDER SHOPPING PROCEDURES
To
___________________________________
___________________________________
___________________________________
___________________________________
Dear Sirs,
Sub: Construction of Shed for 3 TPD Composting Facility at Santoshi
Nagar at Paradeep Municipality under ICZM Project.
1. You are invited to submit your most competitive quotation for the following works:-
Brief Description Approximate value Period of
Of the Works of Works (Rs.) Completion
Construction of Shade
For 3TPD Composting Facility 7544780 .00 2 Month (Including rainy season)
At Santoshinagar
at, Paradeep,Odisha
2. Government of India has received a credit from the IBRD/International Development
Association (IDA) in various currencies equivalent to US$ 285.67 million towards the
cost of the ICZM Project and intends to apply part of the proceeds of this credit to
eligible payments under the contract for which this invitation for quotations is issued.
31. The ICZM Project in Odisha state is being implemented by ICZMP Odisha, which is
an autonomous society registered under the Societies Registration Act.
4. To assist you in the preparation of your quotation, we are enclosing the following:
i. Layout Drawings of the works;
ii. Structural Details;
iii. Detailed Bill of Quantities
iv. Technical Specifications;
v. Instructions to Bidders (in two sections).
vi. Draft Contract Agreement format which will be used for finalizing the
agreement for this Contract.
5. You are requested to provide your offer latest by 11.30 AM. On 04.09.2018
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6. Quotations will be opened in the presence of Bidders or their representatives who
choose to attend at 12.00 NOON on 04.09.2018 in the office of State Project
Management Unit
7. We look forward to receiving your quotations and thank you for your interest in this
project.
Name : Project Director, ICZMP
Address: ICZMP Odisha
108, Surya Nagar,Unit-7
Bhubaneswar,Pin-751003
Tel. No: 0674-2397995
Fax No. 0674-2397965
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Instructions to Bidders
SECTION - A
1. Scope of Works
The Project Director, ICZMP SPMU, Odisha on behalf of Executive officer cum
Nodal Officer, Paradeep, invites quotations for the construction of works as detailed in
the table given below
Brief Description Approximate value
of Works (Rs.)
Period of
Completion Construction of Shade for Rs 75,44,780/- 2 Month including
3 TPD Composting facility
At SantoshiNagar ,Paradeep
The successful bidder will be expected to complete the works by the intended
completion date specified above.
2. Qualification of the bidder: The bidder shall provide qualification information which
shall include:-
(a) Total monetary value of construction works performed for each year of the
last 3 years:
(b) Report on his financial standing; and
(c) Details of any litigation, current or during the last 3 years in which the bidder is
involved, the parties’ concerned and disputed amount in each case.
3. To qualify for award of the contract the bidder:-
a) Should possess valid license and Satisfactorily completed (not less than 90% of
contract value), as a prime contractor of similar work of on single responsibility of
value not less than Rs 67,90,302/- lakhs
b) Executed in any one year, the following minimum quantities of work :
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i) Earth Work : 206 cum
ii) Sand filling : 5284.43 cum
-
4. Bid Price
a) The contract shall be for the whole works as described in the Bill of quantities,
drawings and technical specifications. Corrections, if any, shall be made by
crossing out, initialing, dating and re writing.
b) All duties, taxes and other levies payable by the contractor under the contract
shall be included in the total price.
c) The rates quoted by the bidder shall be fixed for the duration of the contract
and shall not be subject to adjustment on any account.
d) The rates should be quoted in Indian Rupees only.
5. Submission of Quotations
5.1 The bidder is advised to visit the site of works at his own expense and obtain all
information that may be necessary for preparing the quotation.
5.2 Each bidder shall submit only one quotation.
5.3 The quotation submitted by the bidder shall comprise the following:-
(a) Quotation in the format given in Section B.
(b) Signed Bill of Quantities; and
(c) Qualification information form given in Section B duly completed.
5.4 The bidder shall seal the quotation in an envelope addressed to the Project Director,
ICZMP-Odisha (Purchaser). The envelope will also bear the following identification:-
Quotation for Furnishing work of SPMU, Office in new location
(Construction of Cabins, Partition ,electrical ,PH Works etc) (Name of the
Contract)
Do not open before 12 Noon on 04.09.2018 (time and date of quotation
opening).
5.5 Quotations must be received in the office of the Project Director, ICZMP
SPMU,Odisha (Employer) not later than the time and date given in the letter of
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invitation. If the specified date is declared a holiday, quotations shall be received upto
the appointed time on the next working day.
5.6 Any quotation received by the Project Director, ICZMP Odisha (Employer) after the
deadline for submission of quotations will be rejected and returned unopened to the
bidder.
6. Validity of Quotation
Quotation shall remain valid for a period not less than 45 days after the deadline date
specified for submission.
7. Opening of Quotations
Quotations will be opened in the presence of bidders or their representatives who
choose to attend on the date and time and at the place specified in the letter of
invitation.
8. Information relating to evaluation of quotations and recommendations for the award of
contract shall not be disclosed to bidders or any other persons not officially concerned
with the process until the award to the successful bidder is announced.
9. Evaluation of Quotations
The Employer will evaluate and compare the quotations determined to be substantially
responsive i.e. which
(a) Meet the qualification criteria specified in clause 3 above;
(b) Are properly signed; and
(c) Conform to the terms and conditions, specifications and drawings without
material deviations.
10. Award of contract
The Employer will award the contract to the bidder whose quotation has been
determined to be substantially responsive and who has offered the lowest evaluated
quotation price and who meets the specified qualification criteria.
10.1 Notwithstanding the above, the Employer reserves the right to accept or reject any
quotations and to cancel the bidding process and reject all quotations at any time prior
to the award of contract.
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10.2 The bidder whose bid is accepted will be notified of the award of contract by the
Employer prior to expiration of the quotation validity period.
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11. Performance Security
Within 15 days of receiving letter of acceptance, the successful bidder shall deliver to
the Nodal Officer cum Executive officer ,Paradeep Municipality , ICZMP –Odisha,
the performance security ( a bank guarantee) for an amount equivalent of 3 % of the
contract price. The Performance Security shall be valid till the expiry of the period of
maintenance of the work, specified in clause 12.Failure of the successful Bidder to
furnish performance security and signing the agreement within stipulated time shall
constitute sufficient grounds for annulment of award and debarring the bidder for a
period of one year, in which case the employer may make the award to the next lowest
evaluated or seek quotation afresh.
12. Period of Maintenance:
The “Period of Maintenance” for the work is six months from the date of taking over
possession or one full monsoon season whichever occurs later. During the period of
maintenance, the contractor will be responsible for rectifying any defects in
construction free of cost to the Employer.
13. Purchase of all construction materials including cement and steel as per the
specifications (ISI certification marked goods wherever available) shall be the
responsibility of the contractor.
14. Fraud and Corruption
The Bank requires compliance with its policy in regard to corrupt and fraudulent
practices as set forth in Annexure-3.
In further pursuance of this policy, Contractor shall permit and shall cause its agents,
Experts, Sub-consultants, sub-contractors, services providers, or suppliers to permit the
Bank to inspect all accounts, records, and other documents relating to the submission
of the Proposal and contract performance (in case of an award), and to have them
audited by auditors appointed by the Bank.
.......................
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SECTION - B
1. Format for Qualification Information.
2. Format for Submission of Quotation.
3. Format of Letter of Acceptance.
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QUALIFICATION INFORMATION
1 For Individual Bidders
1.1 Principal place of business: ______________________________
Power of attorney of signatory of Quotation.
[Attach copy]
1.2 Total value of Civil Engineering 2014-15 ____________________
Construction of work performed in the last 2015-16 ____________________
Three years (in Rs. Lakhs) 2016-17 ____________________
1.3 Work performed as prime contractor (in the same name) on works of a similar nature
over the last three years.
Project
Name
Name of
Employer
Descrip-
tion of
work
Contract
No.
Value of
contract
(Rs.Lakhs)
Date of
issue of
work
order
Stipulated
period of
comple-
tion
Actual
date of
comple
-tion
Remarks
explaining
reasons
for delay
and work
completed
Existing commitments and on-going works:
Description
of Work
(1)
Place &
State
(2)
Contract No.
& Date
(3)
Value of
Contract
(Rs. Lakh)
(4)
Stipulated
period of
completion
(5)
Value of works*
remaining to be
completed
(Rs. Lakhs)
(6)
Anticipated
date of
completion
(7)
* Enclose a certificate from Engineer concerned.
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1.4 Proposed subcontracts and firms involved.
Sections of the
works
Value of Sub-
contract
Sub-contractor
(name & address)
Experience in
similar work
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
1.5 Evidence of access to financial resources to meet the requirements of working capital :
cash in hand, lines of credit, etc. List them below and attach copies of support
documents.
1.6 Name, address, and telephone, telex, and fax numbers of the Bidders’ bankers who
may provide references if contacted by the Employer.
1.7 Information on litigation history in which the Bidder is involved.
Other
party(ies)
Employer
Cause of dispute
Amount
involved
Remarks showing
present status
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QUOTATION
*
Description of the Works:
To:
Subject :
.............................................................................................
Reference : Letter No....................................dated......................from...................
Sir,
We offer to execute the Works described in your letter referred to above in accordance with
the Conditions of Contract enclosed therewith at ......... percentage above / below the estimated
rates, i.e., for a total Contract Price of -
Rs.** _________________________________________________ [ in figures ]
Rs. _________________________________________________ [ in words ].
This quotation and your written acceptance of it shall constitute a binding contract between us.
We understand that you are not bound to accept the lowest or any quotation you receive.
We hereby certify that we have taken steps to ensure that no person acting for us or on our
behalf will engage in bribery.
We hereby confirm that this quotation is valid for 45 days as required in Clause 6 of the
Instructions to Bidders.
We have not been debarred/removed from approved lists/(dealings suspended) by the
Central/State Governments or by the World Bank.
Yours faithfully,
Authorized Signature : Date: ______________
Name & Title of Signatory : _____________________________________________
Name of Bidder : _____________________________________________
Address : _____________________________________________
* To be filled in by the Employer before issue of the Letter of Invitation.
** To be filled in by the Bidder, together with his particulars and date of submission at
the bottom of this Form.
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LETTER OF ACCEPTANCE
CUM NOTICE TO PROCEED WITH THE WORK
(LETTERHEAD OF THE EMPLOYER)
Dated : ____________________________
To : _________________________________ [Name and address of the Contractor]
_________________________________
_________________________________
_________________________________
_________________________________
Dear Sirs,
This is to notify you that your Quotation dated ____________________ for execution
of the _____________________________________________________________ for the
contract price of Rupees __________________________________________ [amount in
words and figures], is hereby accepted by us.
You are hereby requested to furnish performance security for an amount of Rs.
____________________ (equivalent to 3% of the contract price) within 15 days of the receipt
of the letter. The Performance Security in the form of Bank guarantee or a Bank draft in
favour of ..........................(Employer) shall be valid till the expiry of the period of
maintenance i.e. upto ______________________. Failure to furnish the Performance Security
will entail cancellation of the award of contract.
You are also requested to sign the agreement form and proceed with the work not later
than ____________________________ under the instructions of the Engineer,
____________________________ and ensure its completion within the contract period.
With the issuance of this acceptance letter and your furnishing the Performance
Security, contract for the above said work stands concluded.
Yours faithfully,
Authorized Signature
Name and title of Signatory
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Draft Agreement form for
Construction through National Shopping
ARTICLES OF AGREEMENT
This deed of agreement is made in the form of agreement on ________ day
_______________ month ____________ 2018 ___, between the
_____________________________ (Employer) or his authorized representative (hereinafter
referred to as the first party) and _____________________ (Name of the Contractor), S/O
_______________ resident of ______________ (hereinafter referred to as the second party),
to execute the work of construction of __________________________ (hereinafter referred to
as works) on the following terms and conditions.
2. Cost of the Contract
The total cost of the works (hereinafter referred to as the “total cost”) is Rs. ____ as
reflected in Annexure - 1.
3.1 Payments under its contract:
Payments to the second party for the construction work will be released by the first
party in the following manner:-
3.1.a The Contractor shall submit to the Engineer monthly statements of the estimated value
of work completed less the cumulative amount certified previously along with details of
measurement of the quality of works executed in a tabulated form as approved by the
engineer.
3.1.b The Engineer shall check the details given in the Contractor’s monthly statement and
within 14 days certify the amounts to be paid to the contractor after taking into account any
credit or debit for the month in question in respect of materials for the works in the relevant
amounts and under conditions set forth in the contract data.
3.1.c. The value of work executed shall be determined by the Engineer after due check
measurement of the quantities claimed as executed by the contractor.
3.1.d. The value of work executed shall comprise the value of the quantities of the items in the
Bill of Quantities completed and the rate thereto as in Annexure-I
3.1. e. The value of work executed shall include the valuation of Variations and compensation
Events.
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3.1.f The Engineer may exclude any item certified in a previous certified in a previous
certificate or reduce the proportion of any item previously certified in any certificate in the light
of later information.
3.2 Payments
3.2. a Payments shall be adjusted for deductions for advance payments, retention, other
recoveries in terms of the contract and taxes at source as applicable under the law. The
employer shall pay the Contractor the amounts certified by the engineer within 28 days of the
date each certificate. If the Employer makes a late payment, the Contractor shall be paid
interest on the late payment in the next payment. Interest shall be calculated from the date by
which the payment should have been made upto the date when the late payment is made at 8%
per annum.
3.2.b If an amount certified is increased in a later certificate or as a result of an award by
the Adjudicator or an Arbitrator ,the Contractor shall be paid interest upon the delayed
payment as set out in this clause. Interest shall be calculated from the date upon which the
increased amount would have been certified in the absence of dispute.
3.2.c Items of the works for which no rate or price has been entered in will not be paid for by
the Employer and shall be deemed covered by other rates and process in the Contract
.Payments at each stage will be made by the first party.
4. Notice by Contractor to Engineer
The second party, on the works reaching each stage of construction, issue a notice to
the first party or the Engineer nominated by the first party (who is responsible for
supervising the contractor, administering the contract, certifying the payments due to
the contractor, issuing and valuing variations to the contract, awarding extensions of
time etc.), to visit the site for certification of stage completion. Within 15 days of the
receipt of such notice, the first party or the engineer nominated by it, will ensure issue
of stage completion certificate after due verification.
5. Completion time
The works should be completed in 5 (months) from the date of this Agreement. In
exceptional circumstances, the time period stated in this clause may be extended in
writing by mutual consent of both the parties.
6. If any of the compensation events mentioned below would prevent the work being
completed by the intended completion date, the first party will decide on the intended
completion date being extended by a suitable period:
a) The first party does not give access to the site or a part thereof by the agreed
period.
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b) The first party orders a delay or does not issue completed drawings,
specifications or instructions for execution of the work on time.
c) Ground conditions are substantially more adverse than could reasonably have
been assumed before issue of letter of acceptance and from information
provided to second party or from visual inspection of the site.
d) Payments due to the second party are delayed without reason.
e) Certification for stage completion of the work is delayed unreasonably.
7. Any willful delay on the part of the second party in completing the construction within
the stipulated period will render him liable to pay liquidated damages. @ Rs.
*2000.00per day which will be deducted from payments due to him. The first party
may cancel the contract and take recourse to such other action as deemed appropriate
once the total amount of liquidated damages exceeds 2 % of the contract amount.
(Note: The amount of liquidated damages per day should be determined at not
less than 0.05 % of the contract value of the works and indicated here).
8. Duties and responsibilities of the first party
8.1 The first party shall be responsible for providing regular and frequent supervision and
guidance to the second party for carrying out the works as per specifications. This will
include written guidelines and regular site visit of the authorized personnel of the first
party, for checking quality of material and construction to ensure that it is as per the
norms.
8.2 The first party shall supply 3 sets of drawings, specifications and guidelines to the
second party for the proposed works.
8.3 Possession of the site will be handed over to the second party within 10 days of signing
of the agreement.
8.4 The Engineer or such other person as may be authorized by the first party shall hold
meeting once in a month where the second party or his representative at site will
submit the latest information including progress report and difficulties if any, in the
execution of the work. The whole team may jointly inspect the site on a particular day
to take stock of activities.
8.5 The Engineer shall record his observations/instructions at the time of his site visit in a
site register maintained by the second party. The second party will carry out the
instructions and promptly rectify any deviations pointed out by the engineer. If the
deviations are not rectified, within the time specified in the Engineer’s notice, the first
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party as well as the engineer nominated by it, may instruct stoppage or suspension of
the construction. It shall thereupon be open to the first party or the engineer to have
the deviations rectified at the cost of the second party.
9. Duties and responsibilities of the second party
9.1 The second party shall:
a) take up the works and arrange for its completion within the time period
stipulated in clause 5;
b) employ suitable skilled persons to carry out the works ;
c) regularly supervise and monitor the progress of work ;
d) abide by the technical suggestions / direction of supervisory personnel
including engineers etc. regarding building construction ;
e) be responsible for bringing any discrepancy to the notice of the representative
of the first party and seek necessary clarification :
f) ensure that the work is carried out in accordance with specifications, drawings
and within the total of the contract amount without any cost escalation ;
g) keep the first party informed about the progress of work ;
h) be responsible for all security and watch and ward arrangements at site till
handing over of the building to the first party ; and
i) Maintain necessary insurance against loss of materials/cash, etc. or workman
disability compensation claims of the personnel deployed on the works as well
as third party claims.
f) Pay all duties, taxes and other levies payable by construction agencies as per
law under the contract (First party will effect deduction from running bills in
respect of such taxes as may be imposed under the law).
10. Variations / Extra Items
The works shall be carried out by the second party in accordance with the approved
drawings and specifications. However, if, on account of site conditions or any other
factors, variations are considered necessary, the following procedure shall be
followed:-
a) The second party shall provide the Engineer with a quotation for carrying out
the Variation when requested to do so by the Engineer. The Engineer shall
assess the quotation, which shall be given within seven days of the request
before the Variation is ordered.
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b) If the quotation given by the second party is unreasonable, the Engineer may
order the Variation and make a change to the Contract Price which shall be
based on Engineer’s own forecast of the effects of the Variation on the
Contractor’s costs.
c) The second party shall not be entitled to additional payment for costs which
could have been avoided by giving early warning.
11. Securities
The Performance Security shall be provided to the Employer no later than the date
specified in the Letter of Acceptance and shall be issued in an amount and form and by
a bank or surety acceptable to the Employer. The Performance Security shall be valid
until a date 28 days from the date of issue of the Certificate of Completion in the case
of a Bank Guarantee.
12. Termination
12.1 The Employer may terminate the Contract if the other party causes a
fundamental breach of the Contract.
12.2 Fundamental breaches of Contract include, but shall not be limited to the
following:
(a) the contractor stops work for 28 days and the stoppage has not been
authorized by the Engineer;
(b) the Contractor has become bankrupt or goes into liquidation other than
for a reconstruction or amalgamation;
(c) the Engineer gives Notice that failure to correct a particular Defect is a
fundamental breach of Contract and the Contractor fails to correct it
within a reasonable period of time determined by the Engineer;
(d) The Contractor does not maintain a security which is required;
12.3 Notwithstanding the above, the Employer may terminate the Contract for
convenience.
12.4 If the Contract is terminated the Contractor shall stop work immediately, make
the Site safe and secure and leave the Site as soon as reasonably possible.
13. Payment upon Termination
13.1 If the Contract is terminated because of a fundamental breach of Contract by
the Contractor, the Engineer shall issue a certificate for the value of the work
done less advance payments received up to the date of the issue of the
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certificate, less other recoveries due in terms of the contract, less taxes due to
be deducted at source as per applicable law.
13.2 If the Contract is terminated at the Employer’s convenience, the Engineer shall
issue a certificate for the value of the work done, the reasonable cost of
removal of Equipment, repatriation of the Contractor’s personnel employed
solely on the Works, and the Contractor’s costs of protecting and securing the
Works and less advance payments received up to the date of the certificate, less
other recoveries due in terms of the contract and less taxes due to be deducted
at source as per applicable law.
14. Dispute settlement
If over the works, any dispute arises between the two parties, relating to any aspects of
this Agreement, the parties shall first attempt to settle the dispute through mutual and
amicable consultation.
In the event of agreement not being reached, the matter will be referred for arbitration
by a Sole Arbitrator not below the level of retired Superintending Engineer, PWD to be
appointed by the first party. The Arbitration will be conducted in accordance with the
Arbitration and Conciliation Act, 1996. The decision of the Arbitrator shall be final
and binding on both the parties.
15. Fraud and Corruption:
It is the Bank’s policy to require that Borrowers (including beneficiaries of Bank
loans), contractors, and their agents (whether declared or not), sub-contractors, sub-
consultants, service providers, or suppliers, and any personnel thereof, observe the
highest standard of ethics during the selection and execution of Bank-financed
contracts [footnote: In this context, any action taken by a consultant or any of its
personnel, or its agents, or its sub-consultants, sub-contractors, services providers,
suppliers, and/or their employees, to influence the selection process or contract
execution for undue advantage is improper.]. The Contract would be subject to Fraud
and Corruption as attached in Annexure-3.
16. Right to Audit
The Contractor shall keep, and shall make all reasonable efforts to cause its Sub-
contractors to keep, accurate and systematic accounts and records in respect of the
Works in such form and detail as will clearly identify relevant time changes and costs.
The Contractor shall permit and shall cause its Sub-contractors to permit, the Bank
and/or persons appointed by the Bank to inspect the Site and/or all accounts and
records relating to the performance of the Contract and the submission of the Bid, and
to have such accounts and records audited by auditors appointed by the Bank if
requested by the Bank. The Contractor’s attention is drawn to Clause 13 which
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provides, inter alia, that acts intended to materially impede the exercise of the Bank’s
inspection and audit rights provided for under this Clause 14 constitute a prohibited
practice subject to contract termination (as well as to a determination of ineligibility
under the Bank’s prevailing sanctions procedures.)
Drawings
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Technical Specifications
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1. TECHNICAL SPECIFICATION FOR CIVIL WORKS
1.1 General :
1.1.1 Scope of work:
The work contemplated under this contract includes general Builder‟s work for the
aforesaid project, all as detailed in the Bill of Quantities, Specifications and drawings and
to complete the said work in every respect in accordance with this contract and with the
directions and to the satisfaction of the Engineer-in-charge.
Such other works which are not included in the aforesaid Bill of quantities are generally
intended to be executed through a separate agency. Notwithstanding the above, the
Engineer-in-Charge reserves the right to order additional works under the same Contract.
The Engineer-in-charge also reserves the right to omit any item of work included in the
aforesaid Bill of quantities and award the same to any other contractor or not perform it at
all at his discretion and the Contractor shall not have any claim because of the same.
The Contractor for this work shall be required to work in co-operation and co-ordination
with other agencies on site and give them all reasonable assistance and help for the
execution of the work in an efficient manner all as directed. The words “approved” or “as
directed” shall be deemed to convey approval or the discretion of the Engineer-in-charge
of the work.
1.1.2 Indian Standard Specification:
The particular Specifications for the work are as detailed hereinafter. These specifications
shall be read in conjunction with the relevant Indian Standard Specifications. The
obtainable local practice as detailed in various regional handbooks of practice may be
used subject to specific approval from the Engineer-in-charge. Where the specifications in
any of the standards are at variance with the specifications detailed herein, the
specifications herein shall govern.
1.1.3 Quality of Materials & General Standards of work:
The contractor under this contract commits himself to use materials conforming to
relevant Indian Standards / Codes and assumes full responsibility for the quality of all
materials incorporated or brought for incorporation in the work, the work shall be executed
in accordance with acceptable engineering practice and as per direction of the Engineer-
in-charge.
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1.1.4 Scaffolding:
All scaffolding and ladders required for the proper execution of the work shall be provided
by the contractor. The scaffolding should be stout and strong to prevent any collapse or
displacement. Proper measures for safety of workmen working on scaffolding should be
taken by the contractor.
The mode of measurements, wherever possible is specifically mentioned in these
documents. Where it has not been mentioned, it shall be as per provision of the relevant
Indian Standards. All the measuring tapes and other accessories necessary, shall be
provided by the contractor.
The bidder along with his bid shall furnish a list of tools, plant and machinery which he
intends to use on the works in Bid document. The list should indicate the exact type of
machine, its capacity, year of manufacture, kind and capacity of propelling force, spare
parts readily available and all other pertinent information. The contractor is obliged to use
the machinery mentioned in his list if the Engineer-in-charge considers it necessary.
1.1.5 Surveying and staking:
It is the express responsibility of the contractor to bring to site all surveying instruments
necessary for the marking out, fixation of levels, etc. and conduct these survey operations
himself with utmost accuracy. The contractor shall put up stable bench marks etc. as
necessary for the work. Engineer-in-charge / his representative will be present when this
work is being carried out and will inspect all these operations with the contractor‟s
assistance. The contractor shall be entirely responsible for accurate setting out the work
and he shall at his own expense make good any defects arising from errors in the line and
levels.
1.1.6 Dewatering :
Dewatering of accumulated water in all locations on work site from whatever source of
cause until the virtual completion of the entire work shall be done by the contractor at his
own expenses and shall not be separately paid for. The rates quoted by the contractor
shall be deemed to be inclusive of this.
1.1.7 Access to site, approach roads and roads within the premises:
The contractor shall at his own cost provide all approach roads required for the purpose of
carrying out the work in the most expeditious and efficient manner and shall remove the
temporary roads on completion. He shall acquaint himself thoroughly regarding condition
and suitability of public roads leading up to the limits of the premises and will provide
vehicles for transportation of materials which meet the requirements of these road
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conditions. It shall also be the responsibility of the contractor to maintain at his own cost
the road till the construction is completed. The bidder is also to acquaint himself with local
laws and bylaws and comply with all police and highway authority requirements.
1.2 Earth work:
1.2.1 Excavation:
Excavation for trenches over areas and for pits, etc. shall be done to widths, lines and
levels as shown in drawings or to such lesser or greater widths, lines and levels as
directed. The bottom and side of excavation, required levels, profile, etc. watered and
thoroughly rammed. Where the contractor excavated below required level in good ground
inadvertently or carelessness he shall make up the void in concrete M-10 at his own
expense. During excavation the contractor shall take necessary precaution to retain
earth, so that the earth will not slide or fall down to avoid any accident and hamper the
progress of work. He will take necessary steps to prevent the damage to adjacent
structure or existing services. He shall repair and make good any such damages at his
own expense to the satisfaction of the owner. A suitable path for men and materials
around the excavated pit should be maintained throughout the work. Stacking or
excavated earth from trenches, bids etc. shall be done away from the pit at a minimum
distance equivalent to the depth of pit/trenches/foundation up to a initial lead and lift as
directed by the Engineer-in-Charge.
1.2.2 Dewatering:
All water that may get accumulated in excavations during the progress of work from
whatever cause or source, shall be bailed or pumped out as necessary. The rates for
excavation shall be deemed to include the same, if not otherwise specified.
1.2.3 Timbering & excavation (Shoring)
Where the soil is soft and sides of excavation needs supporting, suitably designed
planking and strutting shall be provided. The rates for excavation shall be deemed to
include all planking and strutting as necessary.
1.2.4 Refilling around foundations:
Refilling around foundations shall be done with approved excavated materials. Refilling
shall be done in layers not exceeding 15cms thick, watered adequately and consolidated
with pneumatic tampers or other suitable compactors. The finished surface of filling shall
be slightly proud to bring it to finished level after watering and consolidation as directed.
The rates for refilling around foundations shall be deemed to include this.
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All materials considered surplus shall be removed to destinations and disposed off as
directed. The disposal of the materials can be in any of the following ways as directed by
the Engineer-in-Charge of the work.
1. Filling in low lying areas.
2. Filling in at places of filling such as under floors, in roads etc.
3. Stacking of materials in pre-designated stacking yard.
4. Removal of materials outside the plot for disposal.
1.2.5 Filling:
Filling under floors or other places indicated shall be done with good quality sand
conforming to zone 2 or 3 I.S: 383. Filling shall be done in layers, each layer watered
adequately and consolidated to specified density by suitable compacting equipment.
Thickness of each layer shall not exceed 15 cm. The surface of the filling shall be
finished to lines and levels as required. The filling shall be compacted in such a manner
as to guarantee full stability. However, the site filling shall be done with Fly Ash from a
source as instructed by the Employer in writing. While the cost of Fly ash shall be borne
by the employer, the transportation and labour costs shall be the responsibility of the
contractor.
1.2.6 Measurement:
Measurement for all excavation, filling, carting away and earthwork shall be in solid
measure. The rates quoted by the bidders are thus for solid measure units. The following
factors shall be applied to obtain quantities of solid measure.
Excavation : No reduction in volume
Filling, watered and : Volume shall be determined by levels
Consolidated in layers before and after compacted filling and by
Measuring the lengths and breadth as required.
The mode of measurement for various types of excavations shall be as under:
a) In case of trenches, pits and areas, measurement shall be on the basis of width of
foundations and the depth of bottom of foundation (bottom of bed concrete, if provided)
formation.
28 NSP/CW
b) In case of pipe trenches and drains, measurement of width of trench shall be diameter of
the pipe plus an allowance of 50 cms. To allow for collars, flanges etc.
c) Excavation in rock shall be measured up to levels indicated or required. No undulations
as physically appearing after excavations shall be taken into consideration while arriving
at the quantities. The rates quoted by the contractor shall be deemed to include for this
and no extra is admissible.
1.2.7 Sub-grade Conditions:
When no data is available of soil formation and depth of water table of proposed work
site, the contractor should make his own arrangements of preliminary site investigation
by actual inspection of the site and surrounding areas to assess the nature of soil and to
foresee the difficulties that may arise during construction period. The contractor shall
acquaint himself of the above before filling up of the bid.
No claim whatsoever will be entertained on any account of conducting these exploratory
works or lack of investigation on the part of the contractor.
1.3 Plain & Reinforced Concrete, Controlled Concrete
1.3.1 General :
Concrete and reinforced concrete work shall be carried generally in conformity with the
latest Indian Standards IS: 456 and for provisions indicated here in below. All work is to
be carried out with utmost precision and up to date scientific know how and the contractor
shall employ thoroughly competent staff to achieve acceptable standards conforming to
technical specifications.
1.3.2 Cement:
Portland slag cement (IS: 455) shall be used wherever so directed by the Engineer in
Charge or as shown in drawings or Bill of Quantities. If directed, the contractor shall
purchase cement as fresh as possible after manufacture and where there is reason to
believe the cement has been long stored, the Engineer-in-charge may demand a
Laboratory Test Certificate regarding the character of cement and the contractor shall
furnish the same at no extra cost. The Engineer-in-charge shall reject any cement which
in his opinion does not meet the required standards.
All bags and containers in which cement is packed shall be stored in a dry, weather tight,
properly ventilated structure with adequate provision for prevention and absorption of
moisture. The contractor shall at all times maintain for the inspection of the Engineer-in-
Charge a log book indicating the receipt of cement, brand and agent from whom obtained
29 NSP/CW
and the age of cement. Cement, which has caked or perished by being wet or otherwise
shall on no account be used on the work.
Cement shall be consumed on the works in the same sequence as that of their receipt at
site. Cement reclaimed from cleaning of bags or from spillage from containers, or
otherwise shall on no account be used.
Portland Slag Cement is to comply to the relevant Indian Standard Specifications IS 455.
This standard stipulates that the slag constituent shall be not less than 25 per cent and
not more than 65 per cent of the Portland Slag Cement.
1.3.3 Fine Aggregate :
(i) Fine aggregate shall conform to latest Indian standards (IS:383). Sand shall be
natural sand, crushed gravel sand or crushed stone sand but it must be a well-
graded sand conforming to IS grading and its FM be 2.4 to 3.2. Use of sea sand
is prohibited. It shall be composed of hard siliceous material and shall be clean
and of sharp angular grit type. Sand shall be properly graded minimizing all voids.
(ii) Allowance for bulking of wet sand shall be made. Bulkage limit is to be restricted to
less than 20%. Silt content in sand should not be more than 5%. Laboratory
equipment such as measuring jars etc. are to be kept at site for time to time
checking of bulkage and silt content.
(iii) Sand shall be free from any harmful organic impurities. Quick colour test should be
made at site for the consignment of sand receiver. Colour test details are given
below:
Colour Test of Sand:
The sand shall be tested with 3% solution of caustic soda (Sodium Hydroxide), which is
called “Colour Test”. This is a reliable indicator of the presence or otherwise of any
organic matter in sand as under.
(i) A colour less liquid indicates clean sand free from organic matter.
(ii) A straw coloured liquid indicates some organic matter but not enough to be
seriously objectionable; and
(iii) A dark colour means that the sand contains injurious amount of organic matter
and should not be used unless it is washed and a retest shows that it is
satisfactory.
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1.3.4 Coarse Aggregate:
Coarse aggregate shall be approved hard aggregate conforming to latest Indian
Standards (IS: 383) details of which are as follows.
(i) Deleterious materials : less than 5%
(ii) Specific gravity : not less than 2.6 (2.6 to 3)
(iii) Water absorption value : about 1% by weight
(iv) Aggregate crushing value : for wearing surface less than 30%
for other concrete surface less than 45%
(v) Aggregate impact value : for wearing surface less than 30%
for concrete other than wearing surface
less
than 45%
(vi) Aggregate abrasion value : for wearing surface less than 30%
for concrete other than wearing
surface less than 50%.
(vii) Soundness (sodium
sulphate method) : less than 12%
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Aggregate, Gradation, storage, etc.
Aggregates of various specified sizes shall be stock piled properly and separately.
Aggregates shall be clean and shall not contain any foreign matter, silt, loose or
destructive substances, harmful chemicals etc.
Aggregates shall be stored in proper bins, which shall have good drainage to
prevent the inclusion of foreign matter and preserve the gradation. Sufficient live
storage shall be maintained to permit segregation of successive shipment, placing
of concrete at the required rate and such procedures as inspection and testing.
If directed, the aggregate shall be washed before use. The grading of aggregate
for use on works shall be as per the Indian Standards (IS : 456 )
1. Grading of Coarse Aggregate as per IS: 456
Sl No. IS size % Passing for graded aggregate of nominal size.
40mm 20mm 16mm 12.5
1 40mm 95-100 100 - -
2 20mm 30-70 95-100 100 -
3 16mm - - 90-100 100
4 12.5mm - - - 90-100
5 10mm 10-35 25-55 30-70 40-85
6 4.75mm 0-5 0-10 0-10 0-10
7 2.36mm - - - -
2. Grading of Single Size Aggregate as per IS: 456
Sl No.
IS size % Passing for single aggregate of nominal size.
40mm 20mm 16mm 12.5mm 10.00 mm
1 40mm 85-100 100 - - -
2 20mm 0-20 85-100 100 - -
3 16mm - - 85-100 -100 -
4 12.5mm - - - 85-100 100
5 10mm 0-5 0-20 0-30 0-45 85-100
6 4.75mm - 0-5 0-5 0-10 0-20
7 2.36mm - - - - 0-5
Proper sieve analysis shall be carried out to determine the best gradation obtainable from the
available aggregates. The sieve analysis shall be performed as per standard practice and as
laid out in the relevant Indian standards.
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1.3.5 Water :
Water for all concrete work shall be clean, free from deleterious matter such as oils,
acids, alkalis, sugar and vegetable matter. Permissible limits for solids shall conform to
IS 456. Every attempt shall be made to use water which is fit for drinking purposes.
Water storage facilities provided by the contractor shall be maintained properly to
preclude contamination of water by any of the harmful substances. The quantity of
water to be added to concrete for mixing shall be such as to afford workability
consistent with strength requirements. Water cement ratio shall be maintained constant
as specified (0.45 for RCC and recorded in every batch of concrete. P.H. of water shall
be in the range 6-9.
The permissible limits, as per IS 456- areas following :
SL. NO. Tested as per Permissible Limit (Max)
(i) Organic------------------- IS 3025 (part – 18)-------------------200 mg/litre
(ii) In organic ---------------- IS 3025 (part 18) --------------------3000 mg/litre
(iii) Sulphates ( as SO3) ----- IS 3025(part 24)---------------------400 mg/litre
(iv) Chlorides (as Cl)--------- IS 3025 (part 32)---------------------2000 mg/litre for
concrete not containing embedded
steel and 500 mg / litre for RCC
work.
(v) Suspended matter----- IS 3025 (part – 17) ---------------------2000 mg/litre
The water cement ratio, being of paramount importance governing the durability of
concrete, it should be of the lowest feasible value. In the subject under reference, it
should be 0.45 for M30 RCC and to achieve sufficient workability, it may be necessary
to use suitable super-plasticizer in the concrete mix to ensure efficient placement of
concrete.
1.3.6 Plasticizers: -
The commonly available admixtures with good to high plastic zing effects are:
(i) Modified ligninsulphonates (MLS)
(ii) Sulphonated melamine condensates (SMF)
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(iii) Sulphonated naphthalene condensates (SNF)
(iv) Poly Carboxylic ethers (CE)
Typical performance of water reducing admixtures are outlined below:
Type of super-plasticiser Typical dosage by cement weight Water reduction
MLS 0.2-0.8% Up to 10%
SMF 1.0-3.0% Up to 25%
SNF 0.8-2.0% Up to 25%
CE (Poly Carboxylic
ethers)
0.5-1.5% Up to 40%
The super-plasticiser based on Poly Carboxylic Ethers (CE) is proving much better than
others. The type and dosage of Super-plasticiser to be used shall be subject to the approval
of the Engineer-in-charge. The dosage shall be arrived at through lab. tests / mix design tests
as approved by the Engineer-in-charge.
1.3.7 Types of concrete, strengths etc. :
The Bill of quantities specifies various types of concrete. The strengths corresponding to
these types is as per table below :
i. Types of Concrete
Sl.
No.
Type of Concrete 28 day Characteristic
Design strength N/mm2
28 day Target Design
Strength N/mm2.
1 M-15 15 15 + 1.65 X 3.5 =20.8
2 M-20 20 20 + 1.65 X 4.0 = 26.6
3. M-30 30 30 + 1.65 X 5.0 = 38.2
Note : The established values of standard Deviations shall be used. When adequate test
results (30 or more) are available and the target strengths revised thereafter. Efforts shall
be made to bring the standard Deviations up to date, preferably once a month.
Even though the Bill of quantities specifies various types of concrete, it is possible that
the type may be altered to suit the site conditions. The compressive strength indicated
above pertains to compressive strength tests on “work test cubes 15 x 15 x 15 cm, after
normal curing for 28 days. The strength of preliminary test cubes shall be as per IS : 456.
The type of concrete for any particular situation of work shall be as per drawings.
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Any construction in the coastal areas may be considered as exposed to “severe”
environmental condition. In assessing the level of severity, it shall be prudent to adopt a
realistic attitude and be even some what conservative in respect of the extent of coastal
zone for the ultimate durability of the structures.
Thus, besides using. Portland Slag Cement, the specific requirement on “durability
aspects”, as per Indian Standard IS 456, in respect of the following parameters, must be
met :-
Minimum Cement Content
Maximum Water / Cement ratio
Cover to Steel Reinforcement.
All these requirements are related to the various „environmental exposure conditions.
The standard IS 456 classifies the environment into 5 levels of severity, that is mild,
moderate, severe, very severe, and extreme.
The parameters relating to minimum cement content and maximum water / cement
ratio, as per IS 456, are summarized below along with the minimum grade of
concrete :-
Exposure
Environment
Exposure
Classifi-
cation
Plain Concrete Reinforced Concrete
Min. (*)
Cement
content)
kg/m3
Max.
water
cement
ratio
Mini. (*)
Grade of
concrete
Min.(*)
Cement
content)
kg/m3
Max.
water
cement
ratio
Min.
Grade of
concrete
Coastal concrete sheltered from saturated salt air.
Moderate 240 0.60 M15 300 0.50 M25
Concrete exposed to coastal environment
Severe 250 0.50 M20 320 0.45 M30
Concrete exposed to sea water spray / or in contact with aggressive soils / ground water
Very Severe
260 0.45 M20 340 0.45 M35
Arrangement for slump cone test shall be kept at site to arrive at workability whenever
theEngineer-in-charge wants to check at site. Arrangement for compacting factor test
shall also be made to Tests for determination of strength of concrete.
ii. Strength of Concrete
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As will be apparent from the Bill of quantities, the strength of concrete specified is the criteria and
the contractor shall make every effort to obtain the strength by good quality. Control. In case of
concrete, which does not obtain the specified strength at 28 days, such work shall be demolished
and reconstructed to obtain the requisite strengths, as directed by the Engineer-in-charge. It has
also to be ensured that the concrete conforms to the durability requirements viz. all requisite
parameters concerning minimum cement content, maximum free water cement ratio and the
specified cover to steel as well as good workmanship to obtain full compaction of concrete with
non honey-combing in the finished concrete etc. have to be meticulously implemented on the job
including fully efficient curing of concrete surfaces. To determine whether concrete in any
particular part of the work is of the requisite strength or not, test cubes (works test cubes) shall be
made from samples collected from the concrete being poured for the particular part and
determined as per acceptance criteria detailed hereinafter. The salient features for the collection
of samples is as indicated below.
Testing of Concrete Cubes for determining Compression strength:
1. Quality
As specified
2. Compression strength
Shall be as specified for the particular type of concrete.
3. Criteria for acceptance of work
Part or element pf concrete work shall be deemed to be acceptable, provided the three cubes tested for 28 days strength conform to the following as per IS 456.
iii. Acceptance criteria of concrete cubes. (As per IS 456)
The Concrete shall be deemed to comply with the strength requirements when both the following conditions are met.
(a) The mean strength – determined from any group of 4 non-over lapping consecutive test:
(b) Any individual test result complies with the appropriate limits in column 3 of the following Table-A
Table A. Characteristic Compressive Strength Compliance Requirement
Specified Mean of the Group of Individual Test
Grade 4 Non-Over lapping Results
in N/mm2
Consecutive Test Results
In N /mm2
1 2 3
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M15 ≥ fck + 0.825 X established Standard deviation (rounded Off to nearest 0.5 N / mm
2) ≥ fck –3 N /mm
2
OR
fck + 3 N /mm2
which ever is greater M 20 ≥ fck + 0.825 X established standard deviation (rounded off to nearest 0.5 N /mm
2 ≥ fck – 4 N / mm
2
OR fck + 4 N / mm2
Whichever is greater fck = 28 days characteristic compressive strength
In the absence of established value of standard deviation, the following values of standard
deviation shall be assumed, and attempt should be made to obtain results of 30 samples as
early as possible to establish the value of standards deviation of the specified grade of
concrete.
Assumed Standard Deviation Grade of Concrete Assumed Standard Deviation (N /mm
2)
M10 & M15 3.5 M20 & M25 4.0 M30, M35 & Above 5.0
The above values correspond to the site control having proper storage of cement‟ weigh
batching of all materials; controlled addition of water regular checking of all materials‟
aggregate grading and moisture content; and periodical checking of workability and strength.
Where there is deviation from the table, the values give above shall be increased by 1 N
/mm2.
Concrete shall be liable to be rejected if it is porous of honey combed, its placement has
been interrupted without providing a proper construction joint, the reinforcement has been
displaced beyond the tolerance specified or the construction tolerances have not been met.
The concrete shall be accepted only after the contractor carries out suitable remedial
measures to the full satisfaction of the Engineer-in-charge.
In case of doubt regarding the grade of concrete used, either due to poor workmanship or
based on results of cube strength tests, core tests shall be carried out. The points from which
cores are to be taken and the number of cores required shall be at the discretion of the
Engineer-in-charge and shall be representative of the whole of concrete concerned. In no
case, however, shall fewer than three cores be tested in accordance with IS – 516. Concrete
in the member represented by a core test shall be considered acceptable if the average
equivalent cube strength of the core is equal to at least 85% of the cube strength of the grade
of concrete specified for the corresponding age and no individual core has a strength less
than 75%.
37 NSP/CW
1.3.8 Quantum of Cubes and testing as per IS 456.
The minimum frequency of sampling of concrete of each grade shall be in accordance
with the following.
Quantity of Concrete No. of samples
In the work (m3)
1 - 5 1
6 - 15 2
16 - 30 3
31 - 50 4
51 and above 4 + one additional sample for
each additional 50 m3 or part there
of.
NOTE: At least one sample shall be taken from each shift. 3 test specimens shall be made from
each sample for testing at 28 days. Additional 3 specimen cubes be cast to determine the
strength of concrete at 7 days.
The direction of the Engineer-in-charge in this regard shall be final and binding.
Batching and making of concrete:
All batching of aggregates and cement shall be by weight. All the necessary equipment such as
weighing equipment, devices for determination of moisture and bulk in sand, slump cone etc.
shall be provided by the contractor. Concrete shall be machine mixed in appropriate mechanical
concrete mixtures until there is a uniform distribution of materials and uniform colour and
consistence is achieved and under no circumstances for less than two and half minutes.
A wooden board approximately 30 cms. X 40 cms. Shall be put up at the concrete mixture on
which shall have been legibly written in English and the local language, the quality of concrete
that is being mixed, the proportions and other relevant data.
1.3.9 Cubes:
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The size of cubes to be prepared and tested shall be 15 X 15 X 15 cm (6” x 6” x 6”)
Cubes each are intended for testing at 7 and 28 days respectively and determining the strength.
Cubes tested at 7 days should give a strength of not less than 70% of the corresponding strength
of structural members and also for works at various levels. It shall also be collected whenever the
usual quality for a particular strength is suspect. The acceptance criteria of concrete cubes as
given above and in IS: 456 is to be followed. The test results of the sample shall be the average
of the strength of 3 specimens. The individual variation shall not be more than ± 15% of the
average. If more, the test results of the sample are invalid.
1.3.10 Preparation and Testing of Cubes:
Casting of cubes, preparation of moulds for the same, processing and curing the cubes and
testing the same shall be as per detailed instruction laid down in the relevant Indian Standard as
amended up to date.
1.3.11 Equipment modules testing etc.
It is entire responsibility of the contractor to prepare and get the cubes tested and provide for all
materials, labour, modules, equipment, faculty and charges for testing etc. The contractor‟s rate
for concrete work shall be deemed to include for these and no extra payment whatsoever is
admissible on this account.
1.3.12 Slump:
The slump cone tests shall be required to be performed to establish workability and the same
shall be carried out free of cost. Suitable Plasticiser / Superplasticiser may need to be used, as
directed by the Engineer-in-charge, in M-20 M-30 & grade RCC to obtain therequisite workability
of concrete at the specified water cement ratio.
1.3.13 Form Work:
Form work shall be properly designed and constructed such that it is rigid enough to remain free
from bulging, sagging or replacement during placing of concrete. It should also be so constructed
as to facilitate removal of the same without damage to concrete. The formwork shall be
adequately watertight to prevent any loss of liquid and grout. All formwork shall be accurately
erected in regard to size, levels etc. In case of timber form work, the surface of forms in contact
with concrete surface shall be wrought. The joints between boards shall be close fitting and very
thin for the concrete surfaces designed to have exposed finish and not intended to be plastered.
Surface of forms coming in contact with concrete shall be treated with approved emulsions or
mineral oil. It shall be ensured that these emulsions do not stain or discolour the natural colour of
concrete.
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All form work shall be removed as per latest IS 456. Form work shall be removed without shock
or vibration. Edges of beams and columns if required to have chamfers shall be obtained by
suitably fixing triangular edge beads 20mm x 20mm to the forms. (No extra is admissible to the
contractor on account of these incidental and minor works for sizes up to and including 20mm x
20mm). Likewise where drip notches are necessary they should be formed by suitably shaped
fillets nailed in forms.
Form work for all beams and other horizontal construction members shall be built to an upward
camber of 1/300” of the span (in the center) to nullify the effects of optical
illusion. The camber shall be in addition to such camber as may be required and shown in the
Static Calculations.
The tolerance on the shapes, lines and dimensions shown in the drawings shall be within the
limits given below:
(i) Deviation from specified dimensions of cross-section of columns and beams……………………………..+ 12mm - 6 (ii) Deviation from dimensions of footings
1. Dimensions in plan…………………………+ 50mm - 12
2. Eccentricity………………………………….0.02 times the width of the Of deviation but not more than 50mm.
3. Thickness…………………………………...± 0.05 times the specified Thickness.
(iii) Plumb, specified Batter, the lines & surface of Columns walls etc…………………………….± 12 mm (in 3m of height) ± 18 mm (in 6m of height) & ± 30 mm (in 12m of height)
After the forms have been erected to line and grade, the same shall be meticulously
inspected as to their adequacy. If the forms are not tight, there will be loss of mortar, which
shall result in honey-combing of concrete or a loss of water which shall cause sand streaking.
If the inspection reveals that the forms are not braced sufficiently to stay in alignment during
concrete placement, concreting operation shall not be commenced till the Contractor sets
right the deficiencies and the forms re-inspected and found O.K. it shall also be checked
during inspection that the formwork as erected conforms to the specified line, grade,
alignment to the specified tolerance limits. Fully adequate rigidity of forms is of paramount
importance since the tolerance limits specified are for the finished concrete and not for the
forms. Consolidation of concrete by the vibrator requires that the forms be tight and strong.
Stability is a very important consideration in the form work and the Contractor shall be made
to understand that the common deficiencies resulting in failure of formwork.
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(i) Inadequate cross bracing: (ii) Inadequate horizontal bracing: (iii) failure to regulate the rate
of placement of concrete in the forms and (iv) abnormal form displacements during & after
concrete placement due to inadequate provision for lateral pressures.
The contractor should ensure that ready access is provided for proper placement of concrete,
vibration of concrete, and for inspection of these operations.
1.3.14 Horizontal Construction Joints :
A very common blemish on formed concrete surfaces in the off “set” often found at horizontal
construction joints where forms have given way (viz yielded) a fraction of couple of
centimeters at the bottom of the new lift. These off –sets should be prevented by so setting
the forms as to fit snugly & tight against the top of concrete in the previous lift and then
securing the forms so as to remain in tight contact during the concrete placement operation.
The anchoring shall be done by using an ample number of ties and bolts above and within a
few centimeters of the construction joint. The ties in the top of previous lift cannot be relied on
to prevent a slight spreading of the forms at the joint. Forms shall overlap the hardened
concrete in the lift previously placed by not more than about 50 mm, though 25 mm lap is
considered satisfactory. The Contractor should take utmost care to ensure that the
construction joints are smooth, free from sharp deviations, projections or edges.
1.3.15 Spalling from the face of concrete :
Occasionally, spalling may occur from the face of concrete when forms are removed. This is
often caused by rough spots on the forms where mortar adheres strongly enough to
overcome the tensile strength of green concrete. Such areas on the forms must be cleaned,
polished and the covered with form oil by the contractor. Wire brushing of timber forms shall
be done very carefully to remove the set-mortar.
1.3.16 Filling of Bolt Holes
(she – Bolts ) or Holes of ties / Rods. The holes left in the concrete surfaces by the She –
bolts or rods etc. shall be duly reamed, cleared, cleaned and filled with – “dry pack mortar” by
the Contractor within a reasonable period of the removal of formwork. Such filling shall be
made flush with the concrete surface. No holes shall be left without the dry-pack mortar filling.
1.3.17 Inspection of Forms :
The Contractor shall inform the Engineer-in-charge well in time (well before commencement
of placement of concrete in the forms) to enable him or his representative to inspect the
formwork as to its adequacy, suitability, alignment, strength and overall fitness. However,
such inspection shall not relieve/ absolve the Contractor of his SOLE RESPONSIBILITY for
41 NSP/CW
the proper formwork, and safety of men, materials, equipment and the consequent results /
consequences.
1.3.18 Transporting and Pouring of Concrete :
No mixing of concrete shall be started unless the situation where they are to be poured are
prepared and kept ready. Concrete shall be poured immediately on preparation. Transporting
of concrete shall be done as speedily as possible and also in a manner to prevent
segregation of aggregates. No re-tempered concrete shall be allowed to be used on the
works. No concrete shall be allowed to fall from a height more than 1.2o Mt. Where the
concrete is to be placed at more depth it should be done through chute as directed by
Engineer-in-charge.
Lift of concreting shall normally be not greater than 2.00 m in height.
Before fresh concrete is placed against an already cast and hardened section, such surfaces
shall be roughened, swept clean, moistened with water and treated with cement slurry. Fresh
concrete shall then be poured as required. Under no circumstances, concrete mixed for more
than 20 minutes shall be used where initial setting has commenced. Dewatering of
excavations for concreting where necessary shall be carried out by the contractor as directed
and the rates quoted by the contractor are deemed to be inclusive of such dewatering. No
concreting shall be done in adverse weather condition without proper precautions or approval
from Engineer-in-charge. No hand-mixing of concrete shall be allowed. In an exceptional /
unavoidable circumstance, it shall be allowed under the specific approval of Engineer-in-
charge and that too for a small or restricted quantity only , and in such a situation, 10% more
cement shall be used than that used when concrete ingredients are machine mixed.
1.3.19 Consolidation and processing of Concrete :
Concrete for all works shall be compacted by means of suitable vibrating equipment. Spare
vibrators needles which are in complete working condition shall always be kept ready at sites
to be put into commission incase of failure of the vibrators or needles under use. The
vibrators shall be operated by skilled personnel, thoroughly instructed as regards the mode,
frequency, duration etc. regarding vibration.
1.3.20 Finish to concrete surfaces :
Finish to concrete surfaces at various situations shall be as per directions of engineer-in-
charge. Where, form finish is specified, the final surface shall be smooth and even and no-
undulations, ridges, spots etc. shall be permitted. They shall be laid to pattern as directed. In
case surfaces intended and directed for form finish, exhibit any of the defects above
mentioned, the surfaces shall be rubbed with carborundum and finished as directed at the
risk and cost of the contractor. The decision as to the acceptability or otherwise of a surface
42 NSP/CW
will be notified by engineer-in-charge and the contractor will implement the instructions
accordingly. The honey-combed concrete shall be meticulously rectified to the full satisfaction
of the engineer-in-charge.
1.3.21 Concrete Cover for Reinforcement:
Where not specifically indicated in the drawings, concrete cover for reinforcement shall be as
per the latest Indian Standards and as per directions at site from time to time. Proper
concrete cover blocks to suite various covers as required shall be provided in adequate
numbers sufficiently ahead of the work.
In respect of the nominal cover to all steel reinforcements including links., it should not be
less than the following to meet the durability requirement ( as per IS 456:2000) :-
Exposure Environment Exposure classification Nominal concrete cover in
mm not less than
Concrete surfaces sheltered from saturated air in coastal areas
Moderate 30
Concrete exposed to coastal environment
Severe 45
Concrete exposed to sea water spray / or in contact with aggressive soils / water.
Very Severe 50
The actual cover should not deviate from the required nominal cover by +10mm and -
0mm.
1.3.22 Construction Joints :
Construction joints in concrete work shall be provided as far as possible only at
predetermined places in consultation with Engineer- in-charge. Joints shall be provided as
specified in latest Indian standards or as directed by Engineer-in-charge.
1.3.23 Curing :
It is very important that all cement concrete work shall be cured properly. All concrete work
shall be kept continuously in a damp or wet condition by pouring or by covering with a layer of
moist sack, canvas, hession or similar material for a minimum period of 14 days from the
date of concreting as per IS 456, prolonged curing beyond even 14 days shall be desirable
(viz keeping the concrete continuously wet). Since the Water –cement ratio of concrete shall
be low (0.45 for RCC M30 grade concrete & 0.5 for M20 grade concrete as per IS 456:2000
Table 5), it is all the more important to ensure prevent of moisture loss from the concrete
43 NSP/CW
through fool-proof and prolonged curing. Water used for curing shall also be free from any
deleterious substances and shall generally be fit for drinking. The work shall be adequately
protected from drying, winds and direct sun rays. The contractor should arrange at his own
cost a temporary water supply line with provision of suitable lines, pump etc. for curing and
constructional purpose to reach all heights.
The contractor shall not be allowed to commence the work of concrete placement until he
makes all the curing arrangements to the full satisfaction of the engineer-in-charge (viz. water
tanks, pumps, delivery lines, spray nozzles etc. as well as the requisite crew earmarked
specifically for undertaking curing). Payment for the concrete placed shall be made only after
its specified curing has been done to the full satisfaction of the engineer-in-charge.
1.3.24 Membrane Curing :
Curring constitutes one of the most vital requirement for the strength & durability of concrete.
Any slackness in curing or doing inadequate curring will adversely affect the durability of
concrete. Fool-proof curring by the contractor is, therefore, a “must”. In case the Engineer-in-
charse finds that the moist curring(viz water curring) by the contractor is not being efficiently
done (particularly on the under sides of slabs & beams etc.), he shall direct him to resort to
the curring by membrane forming “curring compound”. The curing compound should be white
pigmented of approved quality conforming to ASTM-C-309-81 Type-2. This should meet the
requirement of water retention test as per ASTM designation C-158-80. Loss of water in this
test for acceptable curing compound should not be more than 0.55kg/m2 of exposed surface
in 72 hours . The curing compound should also meet the day light reflectance test . Curing
compound is to be sprayed with a nozzle . It should be applied as soon as the bleeding water
disappears ,leaving a dull appearance. This is when there is no free moisture on the surface.
If applied too early, the free moisture will prevent the compound from forming a moisture-
proof film. If applied too late, some of the moisture will have already been lost that should
have been retained for the hydration process. Proper time range will vary from about
30minutes to 2 hours after placement of concrete depending upon humidity and
temperature.Uniform coverage of curing compound on the concrete surface is very important
and, accordingly, it should be mechanically sprayed with a nozzle. The dosage of curing
compound sprayed on the concrete surface should normally be not more than 1litre for about
3.75m2
(sq m) concrete surface area. The contractor shall be allowed to use the curing
compound only upon his furnishing its test reports in respect of the water retention tests &
day light reflectance test. The Engineer may also get the curing compound tested in a
reputed laboratory for its suitability. Payment for the concrete placed shall be made only after
the completion of proper application of membrane-forming curing compound.
1.3.25 Opening and inserts:
All opening and inserts which are designated in due time or as required for services, will be
exactly provided by the contractor including supply of materials. The contractor should also fix
44 NSP/CW
the anchors or such items which maybe supplied by the proprietor in exact position and in
perfect lines and levels, inserts apply to such items as timber, dowels, bolts, loop, brackets,
suspension, irons, hooks , screws, plates, pipe, pipe of various types and diameter etc.
Openings in concrete or masonry must be provided in exact location, to correct shape, size
and depth or slightly bigger, as shown in drawings or as instructed. It must be clearly
understood that provisions of inserts and openings as contemplated in this contract are to be
carried out with “utmost precision” and any deviation of the same from that as shown in
drawing or instructed have to be rectified by the contractor at his own cost and responsibility.
The contractor should make provision of openings to deep beams and their members at
bottom or at lower level as necessary for cleaning purpose prior to concreting.
1.3.26 Steel reinforcement:
All reinforcement for concrete work shall be Fe-500/Tor steel (HYSD) and conforming strictly
to the latest Indian Standards. They shall be of tested quality. Reinforcement shall be
fabricated to shapes and dimensions shown on the drawing and shall be placed where
indicated on the drawings or required to carry out the intent of drawing and specifications or
as directed by Engineer in charge. Before placing, reinforcement shall be thoroughly cleaned
of loose rust, coating etc. which would result in reducing or destroying the bond. Oiling the
bars to clean them is strictly prohibited. Bending, straightening, cutting etc. operations shall
be carried out in a manner not injurious to the material. Assembly of reinforcement, placing of
reinforcement, Tolerance for Cover, welding of joints etc. shall generally conform to the
Indian Standard specifications. IS 456.
1.3.27 Placing of Reinforcement.
Before the reinforcement is placed, the surfaces of bars and the surfaces of any metal bar
supports shall be cleaned of all rust, loose mill scale, dirt grease and any other objectionable
matter.
(ii) All reinforcement bars shall be accurately placed in exact position shown in
drawings and shall be securely held in position during placement of concrete by
annealed binding wire, and by using stays, blocks, metal chairs, spacers or other
approved devices at sufficiently close intervals (less than 1 m interval) so that the
bars do not sag.
(iii) Wire for binding reinforcement shall be soft and of annealed mild steel of 16
SWG and shall conform to IS 280
(iv) The bars shall not be allowed to sag between the supports and also not allowed
to be displaced during concrete placement. Also, the contractor has to ensure that
no disturbance is caused to the reinforcement bars already placed in concrete.
45 NSP/CW
(v) All devices used for positioning of bars shall be of non-corrodible material. Metal
supports shall not extend to the surface of concrete except where shown in the
drawings. Pieces of broken stone or brick or wooden block shall not be used.
(vi) The contractor must ensure that the CONCRETE COVER AS SPECIFIED IS
METICULOUSLY PROVIDED.
All bars protruding from concrete and to which other bars are to be
spliced, and which are likely to be exposed for a long period. SHALL BE
PROTECTED BYA THICK COAT OF NEAT CEMENT GROUT.
(vii) Reinforcing bars of 25 mm in diameter and less may be either lapped or but
welded whichever is considered more practical by the Engineer.
(viii) Reinforcing bars of 28 mm in diameter and larger may be connected by butt
welding provided that the lapped devices will be permitted if found to be more
practical than butt welding and furthermore that the lapping does not encroach on
cover limitation or hinder concrete or reinforcement placement. Electric are
welding shall, preferably, be used.
(ix) Tolerance for Cover. Unless specified otherwise, actual concrete cover should not
deviate from the required /specified nominal cover by + 10 mm.
All reinforcement shall be bent cold. Unless otherwise directed,
reinforcement shall not be spliced at points of maximum stresses. Engineer in
charge shall be informed of the same before such splicing is taken up. Laps and
splicing shall conform to the latest Indian Standards.
Reinforcement shall be accurately tied at all intersections and laps with 16
SWG soft drawn binding wire, such that the reinforcement will give a rigid
structure. Binding wire will not be measured or accounted for separately. The
contractor‟s rate for reinforcement will be measured and paid for according to
bending lists without allowances for cutting, wastage, binding wire etc. authorised
laps, hooks, chairs, spacers etc. shall however be accounted for in case, the
contractor or engineer desires to resort to welding or swivel nuts, there shall
however be made as if the laps have been provided and no extra claim
whatsoever shall be admissible on this account
Reinforcement shall be assembled in place with proper concrete cover
blocks to suite various covers as required.
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1.3.28 Measurements:
All measurements shall be as given below or where not given as per latest IS :
1200. Concrete will be compensated for according to its actual volume.
The computation will be based upon the construction plans only and no site
measurements shall be taken for this purpose. All incidental work stated in the Technical
specifications and also dewatering at the time of concreting are deemed to have been
included for in the unit prices quoted by the contractor. Opening with an area larger than
0.1sqm shall be deducted from concrete quantity and where openings are smaller, these
shall not be deducted.
Form work will be measured and paid for according to their contact area. The unit
prices of the forms incorporates all scaffolds, nails, clamps, and all incidental work.
Openings with an area larger than 2m2 shall be deducted from work quantities and the
form work required for sides of such openings shall be paid for. Openings of less than 1
m2 area shall not be deducted from work quantities and no allowance for from work for
sides of such openings shall be made.
Reinforcement steel will be compensated for according to the approved bending
lists without allowances for cutting, rolling margin and waste. Binding wire, cover blocks
etc. will not be measured or paid for separately. The contractor shall prepare the Bar
Bending Schedules and incorporate the same on the reinforcement drawings as directed
and submit it to engineer in charge for approval.
All openings and inserts which are indicated in drawings and as per requirements
for services shall be provided at exact positions and no payments shall be made for
providing or fixing these. Only such openings or inserts which have not been indicated
earlier or such additional openings / inserts required specially due to changes made by
engineer in charge shall be paid for. Excepting for the above, all other measurements
shall be as per stipulations under the latest Indian Standards Mode of Measurements for
Building works.
Information on cement concrete
Sl.
No.
Information Item No.1 of BOQ
Item No.4 of BOQ
Item No.5 of BOQ
Item No.6 of BOQ
Item No.22 of BOQ
1. Type of Mix Design Mix Design Design mix Design Nominal
47 NSP/CW
(Design mix or nominal mix)
mix mix mix
2. Grade designation M30 M15 M20 M30 M20
3. Type of cement Slag cement (I.S : 455 )
Slag cement (I.S : 455)
Slag cement (I.S : 455 )
Slag cement (I.S : 455 )
Slag cement (I.S : 455 )
4. Maximum nominal size of aggregates (mm)
20 20 20 20 12
5. Minimum cement content(kg) / m
3 of cement
(for design mix content)
320 - 250 320 -
6. Maximum water cement ratio ( for design mix concrete)
0.45 - 0.50 0.45 -
7. Maximum quantity of water for 50 Kg. Of cement (Nominal mix)
- - 32 - 32
8. Workability
(slump in mm)
100 to 150 (water-free unlined holes) 150 to 200 (for concreting by tremie)
75 to 100 50-75 25-75 -
9. Exposure condition Severe Severe Severe Severe Severe
1.4 Under reamed Piles :
Latest I.S. specifications to be followed for execution of the items are (1) I.S. 2911 (Part –
III & part IV) . revised, (2) I.S. 455 (3) I.S.-1489, (4) I.S. -456, (5) I.S. 383, (6) I.S. 1786 &
(7) I.S. -2720.
1.4.1 General: At the time of filling his tender, the contractor shall visit and inspect existing site
to examine the nature of ground, type of soil levels etc. No claim or allowance what so
ever shall be admissible on this account or on account of omissions in the levels or the
48 NSP/CW
description of the ground turning out to be different from what was shown on the
drawings.
1.4.2 Setting out: The contractor shall locate and layout all the piles at his own cost or as per
drawings and approval of the Engineer in charge. If at any time during the progress of the
work any error shall appear or arise in the position, levels, divergence & alignment of any
part of the work, the contractor on being required to do so by the engineer in charge shall
at his own cost rectify such errors to the satisfaction of the engineer in charge unless
such error is based on incomplete data supplied to the contractor. The contractor shall
carefully protect all bench marks. Pillars, sight rails, pegs and other things used tin setting
out.
1.4.3 Material:
i. Concrete: The concrete for piling work shall be controlled as per specifications for
the cement concrete and of grade specified on the drawings.
ii. Reinforcement: The reinforcement for piling work shall be as per specifications for
the cement concrete and of grade specified on the drawings.
iii. Bentonite : Bentonite as brought to the site and prior to mixing shall be in
accordance with the following specifications :
(a) a certificate is to be obtained by the contractor from manufacture of the bentonite
powder stating the manufacturer‟s consignment and the properties of consignment as
determined by the manufacturer. The certificate shall be made available to the engineer
in charge on request.
(b) The bentonite powder shall be mixed thoroughly with clean fresh water. The
percentage of bentonite used to make the suspension shall be such as to maintain the
stability of the excavation trench / bore.
(c ) Control tests are to be carried out on the bentonite suspension using suitable
apparatus to determine.
A. The density
B. The viscosity
C. The shear strength
D. The PH value of the freshly mixed bentonite
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These tests shall be carried out initially until consistent working pattern has been
established.
1. When the tests show consistent behaviour some or all tests maybe discontinued
at the discretion of the engineer in charge.
2. Prior to placing concrete the contractor shall ensure that contaminated bentonite
suspension has not accumulated in the bottom of the trench to impair the free
flow of concrete. The contractor shall state the method of testing checking this
item along with the tender and obtain approval of the engineer in charge prior to
commencement of the work.
3. The temperature of the water used in mixing bentonite suspension and of the
suspension and of the suspension supplied to the trench excavation shall not be
less than 5 deg. Centigrade.
4. During construction the level of the bentonite suspension in the trench shall be
maintained within the depth of the guide walls and at a level not less than 1.0 m.
above the level of external standing water if any.
5. In the event of the sudden loss of bentonite suspension, the trench shall be
backfilled without delay and the instruction of the engineer-in-charge shall be
obtained on further course of action.
6. Where saline or chemically contaminated water is encountered, special measures
shall be taken as desired by the Engineer-in-charge.
7. All reasonable steps shall be taken to prevent the spillage of bentonite
suspension on the site away from the immediate vicinity of the wall. Discarded
bentonite and suspension, which has been pumped from the trench, shall be
immediately removed from the site.
1.4.4 Piling System.
i. These specifications cover only bored cast-in-situ under reamed piles.
ii. Termination levels of piles shall be as shown on the drawings or as decided by the
engineer-in-charge during the progress of construction keeping in view the initial test
result.
iii. In order to satisfy himself about the adequacy of the proposed length and anticipated
safe load carrying capacity of the piles the contractor shall examine the soil data
available with the engineer-in-charge.
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iv. A pile capacity assumed by the contractor in his quotation whether it is the one that is
given in the drawing or is the one computed by him will be guaranteed by him.
v. The assumed safe carrying capacity of the piles shall confirm to relevant I.S.
specification for working piles.
vi. If the interpretation of load test indicates that the safe bearing capacity of the piles is
less than the assumed and guaranteed by the contractor additional piles will be
provided by the contractor at his own cost.
vii. The contractor shall guarantee safe bearing capacity of all piles.
1.4.5 Under Reamed Piles:
i. Under reamed piles shall generally be in accordance with the relevant provisions of IS
2911.
ii. The diameter of the under reamed bulb shall be 2.5 times the diameter of the pile
stem.
iii. Unless shown the center to center spacing to the piles shall not be less than twice the
diameter of the bulb.
iv. The piles shall be designed to carry compressive as well as up lift forces due to ground
water head.
v. The theoretical calculation of the load carry capacity and the uplift or anchorage capacity
of the piles based on the soil conditions shall be submitted to the Engineer-in-charge.
vi. Effect of grouping the piles shall be considered in the design calculations.
vii. The Engineer-in-charge reserves the full right of demanding modification or complete
revision of design calculations submitted by the contractor.
viii. The Engineer-in-charge reserves the full right to adjust the bearing capacity of the piles
depending on the performance of test loading.
1.4.6 Construction of Techniques:
i. Safety of existing structure: The contractor shall take every precaution to avoid damage
to the existing structures in the vicinity as a result of construction of pile foundations. All
claims arising out of damage to the existing structure due to the construction of piles shall
be done by contractor.
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ii. Bore holes: Boreholes shall be made by any standard method. The contractor will
submit along with the tender a description of the equipment and of the method of the
boring he proposes to use for checking and approval by the Engineer-in-charge.
iii. If high water table is encountered causing possible instability of the bores, boring and
under reaming shall be carried out using a suitable fluid such as betonies slurry. In
addition normal spiral or modified augers having arrangements to avoid back suction
shall be used.
1.4.7. Placing of Concrete:
i. The boreholes shall be cleaned of all soil cuttings and sediments before placing concrete.
ii. Concrete shall be placed through a funnel so as to fill the entire volume of borehole
without formation of voids. Mechanical vibrators shall not be used.
iii. Under water concreting shall be carried out by displacement method and a termite pipe of
diameter of not less than 15 cm having suitable protective arrangement at the lower end
may be used.
iv. The minimum pile stem diameter for under water concreting shall be 25 cm.
v. The volume of concrete placed shall be observed in the case of first few lines. The
average figure thus obtained shall be used to check possible undue variations in the
volume in the subsequent piles. In case of significant variations, the contractor shall
investigate the possible causes to the complete satisfaction of the Engineer-in-charge
whose decision in this regard will be final and binding on the contractor.
vi. When using the bentonite slurry technique utmost care shall be taken to avoid mixing of
slurry with concrete. In any case the method of concreting shall be subject to the
approval of the Engineer-in-charge.
1.4.8 Finish Pile Heads:
i. The top of the piles shall be brought up above the specified cut off level by at least
30cm. To permit all the laitance and weak concrete to be removed and to ensure that
the pile can be properly keyed into the pile cap by a minimum of 5 cm. This additional
concrete shall not however be paid extra.
ii. The reinforcement in the pile shall be exposed for a length of at least 50 times the
diameter of the Tord steel used or as specified in the drawings beyond the theoretical
point of cut off of the pile to permit to be adequately bended into the pile cap.
1.4.9 Control of Alignment and Tolerances:
52 NSP/CW
i. Errors in setting out shall not exceed 12mm, measured horizontally from the center of
the piles.
ii. If the piles are not found to be in the exact position or out of plumb by more than 1%
or if they are found to be skew or defective in any other manner, they shall be rejected
and the decision of the Engineer-in-charge will be final and binding in this regard.
1.4.10 Defective Piles:
i. The Engineer-in-charge will have full authority to reject any pile at the time of
chipping of excess concrete to bring the level of the pile head to the cut off level,
in case it is found that,
a. Diameter of the pile at the cut off level is smaller than the diameter specified.
b. Location of the pile is outside the limitations prescribed in these specifications.
c. Concrete at the cut off level is of poor quality or is of less strength than had been
specified.
d. Diameter of bars, spacing, shapes or lengths of piles reinforcement do not
conform to details given in the drawings or the reinforcement cage is disfigured,
distorted, displaced or other wise damaged in any manner.
e. Anchorage length of the reinforcement bars at the cut of level is inadequate.
ii. The contractor shall make good the piles, pull out the piles or provide new piles in
place of the rejected piles at his own cost and without any additional cost to the
client even if the pile had been accepted at the time of boring. The final
acceptance of all piles shall be made after the pile head has been brought to the
cut off level, all reinforcement required to be embodied in pile cap exposed and
after all measurement have been completed vis a vis the layout of the piles.
1.4.11 Load Tests:
i. Testing Procedure: The contractor, along with his tender, shall submit a
description of his procedure for carrying out load tests. The engineer-in-charge
reserves the full right to demand a modification of the test procedure proposed by
the contractor at no extra cost.
ii. Number of Initial test Piles: To determine the safe load of a pile or group of
piles the cyclone shelter as per IS 2911 (Part IV). No payment shall be made for
initial test piles and it‟s testing. The contractor should include in his rate his
expenditure towards initial load test piles and initial load testing.
53 NSP/CW
iii. Routine Load test: Routine test shall be conducted on 2% of the total number
of piles, for which the contractor will be paid as per relevant items in the BOQ.
iv. Equipment: The contractor shall provide all necessary equipment for applying
specified vertical load on the top of the test pile and for measuring the settlement of
the pile.
v. Loading device: the device for giving the vertical load shall be of suitable design to
avoid impact, lateral forces, tilting etc. and shall have an arrangement for gradual
application of load and for readings at close intervals. The load shall be in the form
of suitable Kent ledge.
vi. Apparatus for measuring settlement: The apparatus for measuring settlement shall
consist of a dial gauge permitting a reading of 0.02 mm accuracy. The dial gauges
shall be fixed to the datum bar whose ends rest upon non-movable supports. The
supports for datum bar with reference to which the settlement of the pile would be
measured shall be at least 5 d away, clear from piles, “d” being the diameter of the
piles.
vii. Loading procedure: the head of the pile shall be at the cut off level and shall be
capped in such a manner as to prepare a horizontal place – bearing surface. The
maximum test load shall be twice the anticipated working load on the pile
Alternative loading and un loading shall be carried out for 25, 50, 75, 100, 125, 150,
175, 200 percent of the anticipated safe test load. Settlement and time shall be
recorded in the beginning and end of loading and also for at least 2 hours after
completion of each loading and unloading.
viii. Sustained loading: The maximum test load of twice the anticipated working load on
the pile shall be applied in increments of 25, 50, 75, 100, 125, 150, 175, and 200
per cent of the anticipated working load. Settlement reading shall be taken to the
accuracy of 0.02 mm before and after the application of each new load increment.
Additional load shall not be applied until the rate of settlement under the previous
increments is less than 0.02 mm per hour or 2 hours have elapsed which ever
occurs first. When loading has been completed, the full test load shall remain on
the pile for 24 hours or for a longer period if the necessity is there or if indicated by
the rate of the settlement of the pile and settlement reading shall be taken during
and at the end of the period. During the unloading of the pile, the rebound shall be
measured when the load remaining on the pile amount to 75, 50, 25 and 0% of the
full test load with decrements of load released at not less than half hour intervals
and with measurements of the rebound being released at not less than half hour
intervals and with measurements of the rebound being made immediately before
and after each decrement. The final rebound shall be recorded 24 hours after the
entire test load has been removed.
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ix. Reports: The contractor shall submit the report of the load test, which shall
include the following information.
a) A description of the soil condition at the location of each test pile.
b) A description of the pile and its boring record including boring time,
rate, types of soil strata encountered and the stability of the sides, density of the
bentonies used and any other relevant data.
c) A tabulation of the loads and settlement readings during the loading
and unloading of the pile.
d) Time load settlement curves.
e) Remarks concerning unusual occurrences if any during boring or loading of
piles.
1.4.12 Basis of measurement:
i. The length of the pile shall be measured from the theoretical cur-off point of the
pile to its termination level.
ii. The length of the empty boring will be measured from the top of existing ground
level at the time of starting of the particular pile to top of the theoretical point if cut
off of the particular pile.
iii. The rate for the piles shall include the boring concreting with slump as per IS
specifications complete in all respects in respective of the construction technique
used unless otherwise specified in the schedule of quantities.
iv. The rate for load testing shall include the cost of all different operations involved
like arrangements of the equipment including all Kent ledge, or dial gauge as well
as preparation and furnishing of reports complete in all respect.
v. The payment for the routine test pile or group of piles shall be made to the
contractor only when the test is found to be satisfactory. For tests, which are
found to be unsatisfactory, or which are not completed due to any reason
whatsoever, no payment shall be made to the contractor.
1.4.13 Interpretation of test results:
i. All test results and piling records shall be submitted to the engineer-in-charge in
duplicate for his confirmation.
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ii. Test results shall generally be interpreted is per relevant Indian Standard Code of
practice. The engineer-in-charge may refer the test results to the consultants for
their opinion and decision.
1.5 MASONRY
1.5.1 Materials:
i. Brick:
(a) All bricks shall be table moulded, burnt bricks of required class & quality. They shall be
hard sound and well burnt with sharp edges and of uniform sizes & shapes. Bricks shall
be a neither under burnt nor over burnt and shall be free from cracks, stone floats, or
other such defects.
(b) When immersed in water for 24 hours, a brick shall not absorb more water than 20% of its
dry weight. All bricks shall be identical / equal to samples submitted and approved by
Engineer-in-charge before the commencement of the work. Crushing strength of the class
bricks shall not be less than 75kg. / cm2. Metallic sound of brick is also a criteria for the
above class and quality.
ii. Sand
IS gradation of sand for masonry and plastering work should be as follows:
The sand shall be well graded so as to impart good workability and good finishing. The
gradation requirement of sand shall be as follows:
1. Sand for masonry work( As per IS 2116)
Sl.
No.
IS Sieve size Percentage of passing by weight
1. 4.785 mm 100
2. 2.36 mm 90-100
3. 1.18 mm 70-100
4. 600 microns 40-100
5. 300 microns 5-70
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6. 150 microns 0-15
2. Sand for Plastering (As per IS 1542)
Sl.
No.
IS Sieve size Percentage of passing by weight
1. 10 mm 100
2. 4.75 mm 95-100
3. 2.36 mm 95-100
4. 1.18 mm 90-100
5. 600 microns 80-100
6. 300 microns 20-65
7. 150 microns 0-50
iii. Cement: As described under clause 1.3.2 of technical specification
iv. Additives :
Additives, like integral water proofing compounds, shall be of the approved type from
reputed manufacturers. These shall be used strictly in accordance with the
manufacture‟s instructions/ specifications. The additives shall confirm to IS 9103.
1.5.2 Samples:
When demanded by engineer-in-charge, the contractor shall produce samples of materials
/ carryout samples of work for Engineer-in-charge. All materials used as also works carried
out shall conform to the quality of approved samples Production of these samples shall be
at contractors cost.
1.5.3 Brick masonry:
Brick shall be soaked in clear water for at least six hours in a vat before use. The
average water absorption of brick after immersion in water shall not be more than 20 %
by weight. Bricks shall be laid in English bond unless specified otherwise. No half or
quarter brick shall be used except as closures. Bricks shall be accurately raised to
plumb.
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Brick work shall be raised uniform all round and no part shall be raised more than 1
meter above another at any time. And the work shall be properly toothed and racked
back.
In case of 12.5 cm thick brick walls, hoop iron reinforcement 25mm x 12 to 16 gauge or
wire netting reinforcement shall be provided in every fourth course. The reinforcement
shall be properly bedded in mortar, properly lagged etc. all as directed.
The contractor will have to build in holdfast and such other fittings in brick work without
extra cost.
Joints in brick work shall not be more than 10 mm thick. Brick work shall not be raised
more than 10 to 12 courses a day. The work shall be kept watered thrice a day for 10
days and afterwards twice a day for 3 weeks. All joints shall be thoroughly flushed with
mortar at every course. Care shall be taken to see that bricks are properly bedded and
all vertical joints completely filled to the full depth. The joining of brick work shall be
hauled out to a depth not less than 10 mm as the work proceeds. The surface of brick
work shall be cleaned down and watered properly before the mortar sets.
Construction joints are to be provided at an interval of 30m in case of boundary wall or
where the length of brick wall is long.
The contractor shall also make or leave holes recesses as required and fill in the same
at a later date with lean concrete of m.5 as directed with no extra cost.
“FALG” bricks of proper size & quality as approved by engineer-in-charge can be used
in walls in place of clay bricks. Hollow concrete blocks of approved size, strength&
quality can also be allowed to be used in masonry as approved by engineer-in-charge
at site in place of clay bricks.
1.5.4 Measurements:
i. General
All the rates quoted by the contactor shall be for a fully finished item of work and shall include
for all material, labour, miscellaneous works like storage, loading / unloading, scaffolding,
hoisting gear etc. and also all taxes, duties, overhead, profits, etc.
ii. Masonry
Accounts on masonry shall be settled on the basis of cubic meters or square meters as
indicated in the bill of quantities. Quantities will be decided on the basis of pertinent plants.
Openings and recesses which exceeds 0.10 cum will be deducted from the quantities.
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Openings left initially on specific instructions or as required shall be closed at a later date, if
so instructed by Engineer-in-charge, at no extra cost. Similarly, all openings, recesses,
grooves etc, shall be provided at no extra cost. All materials supplied by clients shall be fixed
in masonry free of charge.
1.6 Wood work and joinery:
1.6.1 Timber:
i. Unless otherwise specified all timber for frames of door, windows & ventilators should
be best quality sal wood. The timber should be free from knots, shakes, fissure, flaws,
sub-cracks & other defects. The surface shall be smooth & free from blemishes &
discolorations.
ii. All timber for carpentry and joinery in touch with masonry or concrete shall be painted
with wood preservative before fixing.
iii. All fully fabricated timber shall be seasoned and chemically treated. The preparation
of timber for joinery is to commence simultaneously with the beginning of the project
work generally and should proceed continuously until all the wood work is prepared
and fixed / stacked on/ near the site as the case may be.
1.6.2 Workmanship and Construction:
a) The workmanship shall be first class and to the approval of the Engineer-in-charge.
Scantling and boardings shall be accurately sawn and shall be of required width
and thickness. All carpenters work shall be wrought except where other wise
described. The workmanship and joinery shall be accurately set out in strict
accordance with the drawing and shall be framed together and securely fixed in
approved manner and with properly made joints. All work is to be properly made
joints. All work is to be properly tenoned, shouldered wedged, pinned, braded etc.
and properly glued with approved quality adhesive to the satisfaction of the
Engineer-in-charge. Door / window frames shall have cut rebates. Planted rebated
shall not be permitted. Where door frames are fixed flush with plaster to walls,
wooden cover mould of 40mm x 12 mm to be provided.
b) Doors, windows Frames :
c) The specification for frames of doors, windows, ventilators and clear story windows
are described here. The frames shall wrought, framed and fixed in position as per
detailed drawing and as directed by the engineer in charge. Specified timber shall
be used, and it shall be sawn in the direction of the grains. Sawing shall be truly
straight and squre. The scanting shall be planed smooth and accurate to the full
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dimensions, rebates, rounding and mouldings as shown in the drawings made,
before assembling. Patching or plugging of any kind shall not be permitted except
as provided. A tolerance of 2 / 3 mm shall be allowed in the finished cross section
dimensions of door and windows frames.
d) Joints :
e) These shall be of mortise and tenon type, simple, neat and strong. Mortise and
tenon joints shall fit in fully and accurately with out wedging or filling. The joints shall
be glued, framed, put together and planned with hard wood or bamboo pins not less
than 10 mm diameter after the frames are put together in position by means of a
press.
f) Glueing of joints :
g) The contact surface of tenon and mortise joints shall be treated before putting
together with synthetic resin adhesive of make, approved by the engineer.
h) Fixing in Position :
i) Before the frames are fixed in position, these shall be inspected and passed by the
engineer. The frame shall be placed in proper position and secured to walls or
columns as the case maybe with metallic fastener, iron hold fasts as per direction of
the Engineer-in-charge.
j) Incase of door frames without sills the vertical members shall be embedded in the
flooring to its full depth. When sills are provided,. these sills shall be embedded and
sunk in the floor to its full depth. The door frames without sills while being placed in
position, shall be suitably strutted and wedged in order to prevent warping during
construction. the frames shall also be protected from damage, during construction.
1.6.4 Measurement:
Wood work wrought and framed shall be measured for finished dimensions. No allowance shall
be made for wastage and for dimensions supplied beyond those specified. Length of each peace
shall be measured over all nearest to one cm, so as to include projections for tenons, scarps or
meters, width or thickness shall be measured to the nearest mm.
In case of moldings, rounding, rebates, circular and varying section, the sectional area of the
piece shall be taken as the area of the least square of the rectangle from which such a section
can be cut.
Rate:
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The rate is to include the cost of all materials required and labour involved in all the operations,
described above.
1.6.5 Paneled Shutter:
a) General :
Solid wood panel for shutters shall be pattered and sized as specified. Where ever possible
each panel shall be in a single width piece. But where two pieces were used, width of each
panel should not be less than 12.5 cm. When made from more than one piece, the pieces
shall be jointed with a continuous tongued and grooved joint and glued together and a
reinforced with metal dowels. The grains of solid panel shall be framed in to grooves to the
full depth of the grooves leaving in air space of 1.5 mm and the faces shall be closely fitted to
the sides of the grooves. Moldings to the edge of panel opening shall be scribed at the joints.
Approved sample should be kept at the site office as per direction of engineer.
b) Joinery work:
Joinery work shall be started immediately, after the commencement of the buildings work. All
pieces shall be accurately cut and planed smooth to the full dimensions without any patching
or plugging of any kind. Rebates rounding and moldings as shown in drawings shall be made
before assembling. The thickness of styles and rails shall be as specified for the shutters. All
members of the door shutters shall be straight without any warp or bow and shall have
smooth, well planed faces at right angles to each other. The corners and edges of planed
faces should be at right angles to each other. The corners and edges of panels shall be
finished as shown in drawings, and these shall have mitered joints with the styles. Styles and
rails shall be properly and accurately mortised and tenoned. Rails which are more than 180
mm in width shall have two tenons. Styles and end rails of shutters shall be made out of one
piece only. The tenons shall pass through styles of at least 3/4th of the width of the style.
When assembling a leaf, styles shall be left projecting as a horn. The styles and rails shall
have 12 mm grove in paneled portion for the panel to fit in.
The depth of rebate in frames for hosing the shutters shall in all cases be 1.25 mm and the
rebate in shutters for closing in double shutter doors or windows shall not be less than 2 cm
in the case of double leafed shutters, the meeting of the styles shall be rebated 20 mm. The
rebate shall be splayed.
The joinery work shall be assembled and passed by the Engineer-in-charge and then the
joints shall be pressed, and secured by bamboo pins of about 6 mm diameter. The horns of
styles shall be sawn off.
c) Tolerance:
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The finished work with a tolerance of + 1 mm in thickness + 2/3 mm in width of styles and
rails shall be accepted.
d) Grounding of joints:
The contact surface of tenon and mortis joints shall be treated before putting together with
bulk type synthetic resin adhesive of a make approved by the Engineer. Shutters shall not be
painted, oiled or otherwise treated, before these are fixed in position and passed by the
Engineer-in-charge. Mountings and glazing bars shall be stationed to the maximum depth of
25 mm, whichever is less. Thickness of each tenon shall be approximately one third the
finished thickness of the members and the width of each tenon shall not exceed five times its
thickness.
e) Beading:
Timber, plywood, hard board and particle board panels, shall be fixed only width grooves but
additional beading may not be provided either on one side or on both sides. In so far as glass
is concerned, beading shall always be provided without grooves. Where beading is provided
without grooves, the beading shall be only one side, the other side being supported by rebate
from the styles. For external doors and windows beading shall be fixed on the outside.
f) Fittings:
Details of fittings to be provided as per the schedule of fittings.
1.6.6 Measurements:
Length and width of the shutters shall be measured to the nearest cm in closed position
covering the rebates of the frame but excluding the gap between the shutter and the frame.
Overlap of two shutters shall not be measured. All work shall be measured net as fixed.
No extra payment shall be made for shape joints etc.
1.6.7 Rate:
It includes the cost of all materials and labour involved in all the operations described above.
1.6.8 PVC Door Frame:
PVC Door Frame shall be made out of PVC section in an overall size of 40 mm x 58 mm
having multi chamber cross section with a minimum wall thickness of 2.5 mm + 0.3 mm to
miter cut at the corner and welded. The frame shall be reinforced with steel or other
appropriate materials as per requirement.
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1.7 CEMENT PLASTERING (Internal & External):
The cement plaster shall be 8 mm, 12mm or 20mm or any thickness as specified in the item.
i. Scaffolding:
For all exposed brick work or tile work, double scaffolding having two sets of vertical supports
shall be provided. The supports shall be sound and strong, tied together with horizontal
pieces over which scaffolding planks shall be fixed. For all other brick work in buildings,
single scaffolding shall be permitted. In such cases the inner end of the horizontal scaffolding
pole shall rest in a hole provided only in the header course for the purpose. Only one header
for each pole shall be left out. Such holes for scaffolding shall, however, not be allowed in
pillars / columns less than one meter width or immediately near the skew portion of arches.
The holes left in masonry works for scaffolding purposes shall be filled with lean concrete and
made good before plastering.
ii. Preparation of surface:
The joints shall be raked out properly. Dust and loose mortar shall be brushed out.
Efflorescence if any shall be removed by brushing and scarping. The surface shall then the
thoroughly washed with water, cleaned and kept wet before plastering is commenced.
In case of concrete surface if a chemical retarder has been applied to the formwork, the
surface shall be roughened by wire brushing and all the resulting dust and loose particles
cleaned off and care shall be taken that none of the retarders is left on the surface.
iii. Application of Plaster:
Ceiling plaster shall be completed before commencement of wall plaster.
Plastering shall be started from the top and worked down towards the floor. All scaffolding
pole holes shall be properly filled in advance of plastering as the scaffolding is being taken
down. To ensure even thickness and true surface, plaster about 15 cm x 15 cm shall be first
applied, horizontally and vertically at not more than 2m. intervals over the entire surface to
serve as gauges. The surfaces of these gauged areas shall be truly on the plane of the
finished plaster surface. The mortar shall then be laid on the wall, between the gauges with
trowel. The mortar shall be applied in a uniform surface slightly more than the specified
thickness. This shall be beaten with thin strips of bamboo about 1 meter long to ensure
thorough filling of the joints, and then brought to a true surface, by working a wooden straight
edge reaching across the gauges, with small upward and side ways movements at a time.
Primarily the surface shall be finished off true with trowel or wooden float according as a
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smooth or a sandy granular texture is required. Excessive trowel in or over working the float
shall be avoided. During this process, a solution of like putty shall be applied on the surface
to make the later workable.
All corners, angles and junctions shall be truly vertical or horizontal as the case may be and
shall be carefully finished. Rounding or chamfering corners, junctions etc. where required
shall be done with out any extra payment. Such rounding or chamfering shall be carried out
with proper templates to the sizes required.
In suspending work at the end of the day, the plasters shall be left out clean to line both
horizontally and vertically, when recommencing the plastering, the edge of the old work shall
be scraped cleaned and wetted with lime putty before plaster is applied to the adjacent areas,
to enable the two to properly joint together. Plastering work shall be closed at the end of the
day on the body of wall and not nearer than 15 cm to any corners. Its shall not be closed on
the body of the features such as plasters bands and cornices nor at the corners. Horizontal
joints in plasterwork shall not also occur on the parapet tops and copings as these invariable
lead to leakage.
No portion of the surface shall be left out initially to be patched up later on.
Finish:
The plaster shall be finished to a true and plumb surface and to the proper degree of
smoothness as required. The works shall be tested frequently as the work proceeds with
a true straight edge not less than 2.5.m long and with plumb bobs. All horizontal lines and
surfaces shall be tested with a level and all jambs with a plumb bob as the work
proceeds.
iv. Thickness:
The thickness of the plaster specified shall be measured exclusive of the thickness of the
key i.e. grooves or open joints in brickwork. The average thickness of plaster shall not be
less than the specified thickness. The minimum thickness of any portion of the surface
shall not be less than the specified thickness by more than 3mm. The average thickness
should be regulated at the time of plastering by keeping suitable thickness of the gauges.
Extra thickness required in dubbing behind rounding of corners at junctions of wall or in
plastering of masonry cornices etc. will be ignored.
Curing shall be started 24 hrs after finishing the plaster. The plaster shall be kept wet for
a period of 7 days. During this period it shall be suitably protected from all damages at the
contractor‟s expense by such means as the engineer may approve. The dates on which
plastering is done shall be legibly marked on the various section plastered so that curing
for the specified period thereafter can be watched.
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Any cracks which appear in the surface and all portions, which sounds hollow when
tapped or are found to be soft or other wise defective, shall be cut out in rectangular
shape and re done as directed by the Engineer-in-charge.
1.8 CEMENT PLASTER WITH A FLOATING COAT OF NEAT CEMENT:
The cement plaster shall be 8mm, 12mm or 20mm 16 mm thick, finished with a floating
coat of neat cement, as described in the item.
When the plaster has been brought to a true surface with the wooden straight edge, It
shall be uniformly treated over its entire area with a paste of neat cement and rubbed
smooth, so that the whole surface is covered with neat cement slurry 1.5mm thick while
the plaster surface is still fresh. Smooth finishing shall be completed with trowel
immediately and in no case later than half an hour adding water to the plaster mix.
1.9 CEMENT CONCRETE FLOORING:
1.9.1 Cement Concrete:
i. General:
Cement concrete of specified mix shall be used and it shall generally conform to the
specifications described in plain concrete.
ii. Sub-Grade:
Flooring shall be laid on concrete sub-grade where so provided. The sub-grade shall be
provided with the slopes required for the flooring. Flooring in verandas, kitchens, baths,
water closets and courtyards shall invariably be provided with suitable slope to drain off
washing and rain water.
If the sub-grade consist of concrete, it shall be allowed to set for 7 days and the flooring
shall be laid in the next 3 days.
If the sub-grade is of lean cement concrete, the flooring shall be commenced preferably
within 48 hrs of the laying of sub-grade. The surface of the sub-grade shall be roughened
with steel wire brushes without disturbing the concrete. Before laying the flooring the sub-
grade shall be wetted and smeared with a coat of cement slurry at 2 Kg. of cement
spread over an area of 1 m2 so as to get a good bond between the sub-grade and
concrete floor.
If the cement concrete flooring is to be laid directly on the RCC slab, the surface of RCC
slab shall be cleaned and the laitance shall be removed and a coat of cement slurry at 2
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kg of cement per sqm shall be applied so as to get a good bond between RCC slab and
concrete floor.
Thickness of floor shall be as specified in the description of the item.
iii. Laying:
Panels:
Flooring of specified thickness shall be laid in the pattern as given in the drawings or as
directed by the engineer. The border shall have metered joints at the corners of the
rooms and intermediate joints shall be in the straight line with the panels. The panel shall
be of uniform size.
The panel shall be bounded by wooden angle iron battens. The battens shall have the
same depth as the concrete flooring. These shall be fixed in position, with their top at
proper level, giving required slopes. The surface of the batten or flats, to come in contract
with the concrete shall be smeared with soap solution or non-sticking oil (form oil or raw
linseed oil) before concreting. The floorings shall butt against the masonry wall, which
shall not be plastered.
The concreting shall be done in the manner described in plane cement concrete. The
battens used for shuttering, shall be removed on the next day of the laying of cement
concrete. The ends thus exposed shall be repaired, if damaged, with cement mortar 1:2 (
1 cement 2 coarse sand) and allowed to set for minimum period of 24 hour the alternate
panels shall then be cleaned of dust, mortar droppings etc. and concrete laid. While
laying concrete, care shall be taken to see that the edges of the previously laid panels are
not damaged and fresh mortar is not splashed over them. The joints between the panels
should come out as fine and straight lines.
iv. Finishing:
The finishing of the surface shall follow immediately after the occasion of beating. The
surface shall be left for some time, till moisture disappears from it. Excessive trawlingshall
be avoided. Use of dry cement or cement and sand mixture sprinkle on the surface to
stiffen the concrete or absorb excessive moisture shall not be permitted.
Fresh quantity of cement shall be mixed with water to form a thick slurry and spread over
of flooring while the concrete is still green. The cement slurry shall then be properly
pressed and finished smooth.
v. Curing:
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The curing shall be done for a minimum period of ten days. Curing shall not be
commenced until the top layer has hardened. Covering with empty cement gunnies shall
be avoided as the color is likely to be bleached with the remnants of cement matter from
the bags.
vi. Precautions :
Flooring in lavatories and bath rooms shall be laid after fixing of water closets and
squatting pans and flooring traps. Traps shall be plugged, while laying the floors and
opened after the floors are cured and cleaned. Any damage done to S.C.‟s squatting
pans and floor traps during the execution of work shall be made good.
The floor shall be protected from any damage during the execution of work.
vii. Measurements:
Length and breadth shall be measured correct to a cm and its area as laid shall be
calculated in sqm correct to two places of decimal. Length and breadth shall be
measured before laying skirting dado or wall plaster. No deduction shall be made nor any
extra paid for any opening in the floor of area up to 0.10 m2.
viii. Rate:
The rate shall include the cost of all materials and labour involved in the operations
described above including application of cement slurry on RCC and or on sub-grade
including roughening and cleaning the surface. Nothing extra shall be paid for laying the
floor at different levels in the same room or count yard and rounding of edges of sunk
floors.
In case the flooring is laid in alternate panels, it includes the cost of shuttering.
1.9.2 a. Glazed ceramic tile flooring
b. Glazed ceramic tile fixing:
6 mm thick glazed ceramic tiles of approved size and colour upto 2100 mm height from
floor level of approved make confirming to IS : in Dado /Skirting in toilets. Ground Floor
fixed in neat cement slurry after soaking the tiles in water over 12 mm thick cement
plaster (1:3) with white cement pointing in joints, including washing and cleaning with
oxalic acid etc. complete.
1.9.3 Kota stone flooring
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Kota stone flooring with 25 mm thick kota stone dressed and polished tiles bottom coated
with neat cement slurry and fixing in flooring on 25 mm thick bed of cement mortar (1.3)
mix and joints filled with grey cement slurry, properly leveled, washed, acid cleaned and
polished.
1.10 WHITE WASHING
i. Materials:
White wash shall be prepared from 5 parts of stone lime and 1` part of shell lime . The
lime shall be dissolved in a tub with sufficient quantity of water ( about 4/5 liters / kg.) lime
and the shole thoroughly mixed and stirred until it attains the consistency of thin cream.
The wash shall be taken out in small quantities and strained through a clean course cloth.
Clean gum dissolved in hot water shall then be added in suitable proportion of 2 kg. Per
m3. Of lime to prevent the white wash coming of easily when rubbed. Indigo as necessary
shall be mixed as per standard practice and as per the direction of Engineer-in-charge.
Preparation of Surface.
The surface shall be prepared removing all mortar droppings and foreign matter and
thoroughly-cleaned with hair or fibre brush or other mean as may be ordered by the
Engineer-in-charge to produce an approved clean and an even surface. All loose pieces
and scales shall be scrapped off and holes racks etc. stopped with mortar to match with
the surrounding finish. The matter should be cured sufficiently.
ii. Application of white wash:
On the surface so prepared, the white wash shall be laid on with a brush, shall be from
top downwards, another from bottom upwards over the first stroke and similarly one
stroke from the right and another from the left over the first brush before it dries. This will
form one coat. Each coat must be allowed to dry and shall be subject to inspection and
approval before the next coat is applied. When dry, the surface shall show no signs of
cracking. It shall present a smooth and uniform finish free from brush marks and it should
not come off easily when rubbed with a finger, minimum 3 coats of white wash shall be
applied or as directed by the Engineer-in-charge.
No portions in the surface shall be left out initially, to be patched up later on.
For new work, the white washed surface shall present a smooth and uniform finish.
Doors, windows, floors and other articles of furniture etc. shall be protected from being
splashed upon. Splashing and droppings, if any, shall be removed and the surfaces
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cleaned. Apart from other factors, mentioned else where in this contract, the rates for
white wash shall include for the following:
a) All labour, materials, equipment required for white washing.
b) Scaffolding including erection and removal.
c) Providing and preparing the white wash
d) Preparing the surface for white wash including the scaffolding.
e) Applying the white wash in three coats minimum if a proper even surface is not
obtained to the satisfaction of the Engineer-in-charge, contractor shall carry out
additional coats of white wash till approval, at contractor‟s expense.
1.11 Weather Coat Cement Paint
i. Materials:
Weather coat cement paint of approved brand and manufacturer shall be used. The
primer where used as on new work shall be cement primer suitable for weather coat
painting as described in the item. These shall be of the same manufacturer as cement
paint. The paint shall be diluted with water or any other prescribed thinner in a manner
recommended by the manufacturer. Only sufficient quantity o paint required for day‟s work
shall be prepared.
The paint and primer shall be brought by the contractor in sealed tins in sufficient quantities
at a time to suffice for a fortnight‟s work, and the same shall be kept in the joint custody of
the contractor and the Engineer-in-charge. The empty tins shall not be removed from the
site of work, till this item of work has been completed and passed by the Engineer-in-
charge.
ii. Preparation of the Surface:
For new work the surface shall be thoroughly cleaned of dust, old white or colour wash by
washing and scrubbing. The surface shall then be allowed to dry for at least 48 hours. It
shall then be sand papered to give a smooth and even surface. An unevenness shall be
made good by applying putty, made of plaster of paris mixed with water on the entire
surface including filling up the undulation and then sand papering the same after it is dry.
Pitting in plaster shall be made good with plaster of paris mixed with the colour to be used.
The surface shall then be rubbed down again with a fine grade sand paper and made
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smooth. A coat of the distemper shall be applied over the patches. The patched surface
shall be allowed to dry thoroughly before the regular coat of distemper is applied.
iii. Application:
a) Primer Coat –
The Primer coat shall be cement primer, as required in the description of the item.
Note:
If the wall surface plaster has not dried completely cement primer shall be applied before
painting the walls.
For new work, after the primer coat has dried for at least 48 hours, the surface shall be
lightly sand papered to make it smooth for receiving the distemper, taking care not to rub
out the priming coat. All loose particles shall be dusted off after rubbing. One coat of
distemper properly diluted with thinner.
water or other liquid (as stipulated by the manufacturer) shall be applied with brush in
horizontal stokes followed immediately by vertical ones which together constitute one
coat.
The subsequent coats shall be applied in the same way. Two or more coats ofweather
coat paint as are found necessary shall be applied over the primer coat to obtain an even
shade.
A time interval of at least 24 hours shall be allowed between consecutive coats to permit
of the proper drying of the proceeding coat.
15 cm. Double bristled distemper brushes shall be used. After each day‟s work, brushes
shall be thoroughly washed in hot water with soap solution and hung down to dry. Old
brushes, which are dirty and caked with distemper shall not be used on the work.
1.12 CEMENT PRIMER:
1.12.1 General
Cement primer coat is used as a base coat on wall finish of cement, lime or lime cement
plaster surface before oil emulsion distemper paints are applied on them. The cement
primer is composed of a medium and pigment which are resistant to the alkalis present in
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the cement, lime or lime cement in well finish and provides a barrier for the protection of
subsequent coats of oil distemper paints.
Primer coat shall be preferably applied by brushing and not by spraying. Hurried priming
shall be avoided particularly on absorbent surface. New plaster patches.
1.12.2 Preparation of the Surface:
The surface shall be thoroughly cleaned of dust, old white or colour wash by washing and
scrubbing. The surface shall then be sand papered to give a smooth and even surface.
Any unevenness shall be made good by applying putty, made of plaster of parties mixed
with water on the entire surface including filling up the undulation and then sand papering
the same after it is dry.
Application:
The cement primer shall be applied with a brush on the clean dry and smooth surface.
Horizontal strokes shall be given first and vertical strokes shall be applied immediately
after wards. This entire operation will constitute on coast. The surface shall be finished as
uniformly as possible leaving no brush marks. It shall be allowed for at least 48 hours,
before oil emulsion paint is applied.
1.13 CEMENT PAINT:
i. Materials:
The cement paint shall be (conforming to IS: 5400) of approved brand and manufacture.
ii. Preparation of Surface:
For new work, the surface shall be thoroughly cleaned of all mortar dropping, dirt, dust,
leaned of all dirt, dust, algae, oil etc. by brushing and washing. Pitting in plaster shall be
made good and a coat of waterproof cement paint shall be applied over patches after
wetting them thoroughly.
iii. Preparation of Mix:
weather coat paint shall be mixed in such quantities as can be used up within an hour of
its mixing as other wise the mixture will set and thicken, affecting flow and finish.
Weather coat paint shall be mixed with water in two stages. The first stage shall comprise
of 2 parts of cement paint and one part of water stirred thoroughly and allowed to stand for
5 minutes. Care shall be taken to add the cement paint gradually to the water and not vice
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versa. The second stage shall comprise of adding further one part of water to the mix and
stirring thoroughly to obtain a liquid of workable and uniform consistency. In all cases the
manufacturers instructions shall be followed meticulously.
The lids of cement paint drums shall be kept tightly closed when not in use, as by exposure
to atmosphere the cement paint rapidly becomes air set due to its hydroscopic quality.
Iv. Application:
The solution shall be applied on the clean and wetted surface with brushes or spraying
machine. The solution shall be kept well stirred during the period of application. It shallbe
applied on the surface, which is on the shady side of the building so that the direct heat of
the sun on the surface is avoided. The method of application of cement paint shall be as
per manufactures specification. The completed surface shall be watered after the day‟s
work.
The second coat shall be applied after the first coat has been set for at least 24 hours.
Before application of the second or subsequent coats, the surface of the previous coat shall
not be wetted.
For new work, the surface shall be treated with three or more coats of waterproof cement
paint as found necessary to get a uniform shade.
Water cement paint shall not be applied on surface already treated with white wash, colour
wash, distemper dry or oil bound, varnishes, paints etc. It shall not be applied on gypsum,
wood and metal surface.
Weather Coat Cement Painting to outside walls
1.14 PAINTING
i. Materials:
Paints, oil, varnishes etc. of approved brand and manufacturer shall be used ready mixed
paint as received from the manufacturer without any admixture shall be used.
If for any reason thinning is necessary in case of ready mixed paint, the brand of thinner
recommended by the manufacturer or as instructed by the Engineer-in-charge shall be
used.
Approved, paints, oil or varnishes shall be brought to the site of work by the Contractor in
their original containers in sealed condition. The material shall be brought in at a time in
adequate quantities to suffice for the whole work or at least a fortnight‟s work. The materials
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shall be kept in the joint custody of the contractor and the Engineer-in-charge. The empties
shall not be removed from the site work, till the relevant item of work has been completed
and permission obtained from the Engineer-in-charge.
ii. Commencing Work:
Painting shall not be started until the Engineer-in-charge has inspected the items of work to
be painted, satisfied himself about their proper quality and given his approval to commence
the painting work. Painting of external surface should not be done in adverse weather
condition like hail storm and dust storm.
Painting, except the priming coat, shall generally be taken in hand after practically finishing
all other builder‟s work.
The rooms should be thoroughly swept out and the entire building cleaned up, at least one
day in advance of the paint work being started.
iii. Preparation of Surface:
The surface shall be thoroughly cleaned and dusted. All rust, dirt scales, smoke and
grease shall be thoroughly removed before painting is started. The prepared surface shall
have received the approval of the Engineer-in-charge after inspection, before painting is
commenced.
iv. Application:
Before pouring into small containers for use, the paint shall be thoroughly in its
containers, when applying also the paint shall be continuously stirred in the smaller
containers so that its consistency is kept uniform.
The painting shall be laid on evenly and smoothly by means of crossing and laying off,
the later in the direction of the grain of wood. The crossing and laying off consists of
covering the area over with paint, brushing the surface hard for the first time cover and
then brushing alternately in opposite direction, two or three times and then finally
brushing lightly in a direction at right angles to the same. In this process, no brush mark
shall be left after the laying off is finished. The full process of crossing and laying off with
constitute one coat.
The left over paint shall be put back into the stock tins. When not in use, the containers
shall be kept properly closed.
No hair marks from the brush or clogging of paint putties in the corners of panels, angles
of mouldings etc. shall be left on the work.
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In painting doors and windows, the putty round the glass panes must also be painted, but
care must be taken to see that no paint stains etc. are left on the glass. Tops of shutters
and surfaces in similar hidden locations shall not be left out in painting.
In painting steel work, special care shall be taken while painting over bolts, nuts, rivets,
overlaps etc.
The additional specifications for primer and other coats of paints shall be as according to
the detailed specifications under the respective headings.
Brush and Containers:
After work, the brushes shall be completely cleaned of paint and linsed oil by rinsing with
turpentine. A brush in which paint has dried up in ruined and shall on no account be used
for painting work. The containers when not in use shall be kept closed and free from air
so that paint does not thicken and also shall be kept safe from dust. When thepaint has
been used, the containers shall be washed with turpentine and wiped dry with soft clean
cloth. So that they are clean, and can be used again.
v. Measurements:
The length and breadth shall be measured correct to a cm. The area shall be calculated
in sq. meters (correct to two places of decimal), except otherwise stated, small articles
not exceeding 10 sq. decimeters (0.1 Sqm.) of painted surfaces where not in conjunction
with similar painted work shall be enumerated.
Painting up to15 cm in width or in girth and not in conjunction with similar painted work
shall be given in running meters.
1.15 Priming coat on wood, Iron, or plastered surface:
1.15.1 Primer:
The primer for woodwork, ironwork or plastered surface shall be as specified in the
description of the item.
The primer shall be ready mixed primer of approved brand and manufacturer.
i. Preparation of surface.
a) Wooden Surface:
The woodwork to be painted shall be dry and free from moisture.
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The surface shall be thoroughly cleaned. All unevenness shall be rubbed down smooth
with sand paper and shall be well dusted Knot, if any shall be covered with preparation of
red lead made by grinding red lead in water and mixing with strong glue sized and used
hot. Appropriate filler material with same shade as paint shall be used where specified.
The surface treated for knotting shall be dry before painting is applied. After the priming
coat is applied the holes and indention on the surface shall be stopped with glazier putty
or wood putty respectively. Stopping shall be not done before the priming coat is applied
as the wood will absorb the oil in the stopping and the later is therefore liable to crack.
All rust and scales shall be removed by scraping with steel wire brushes. Hard skin of
oxide formed on the surface of wrought iron during rolling which becomes loose by
rusting, shall be removed.
All dust and dirt shall be thoroughly wiped away from the surface.
If the surface is wet, it shall be dried before priming coat is undertaken.
b) Plastered Surface:
The surface shall ordinarily not be painted until it has dried completely. Trial patches of
primer shall be laid at intervals and where drying is satisfactorily completed, painting shall
then be taken in hand. Before primer is applied, holes and undulations, shall be filled up
with plaster of paris and rubbed smooth.
ii. Applications:
The primer shall be applied with brushes, worked well into the surface and spread even
and smooth. The painting shall be done by crossing and lying off as described in painting.
All other specifications described under painting shall hold good so far as they are
applicable.
1.16 Painting with ready mixed paint:
Ready mixed paints of approved brand and manufacture and of the required shades shall
be used. They shall conform in all respects to the relevant IS specifications.
1.16.1 Painting of New Surface:
a) Wood Work – The surface shall be cleaned and all unevenness removed as
specified in priming coat on wood, iron & plastered surface, knots if visible, shall be
covered with a preparation of red lead. Holes and indentations on the surface shall
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be filled in with glazier putty or wood putty and rubbed smooth before painting is
done. The surface should thoroughly be dry painting.
b) Iron and Steel work – The priming coat shall have dried up completely before
painting is started. Rust and scaling shall be carefully removed by scraping or by
brushing with still wire brushes. All dust and dirt shall be carefully and thoroughly
wiped away.
c) Plastered Surface- The priming coat shall dried up completely before painting is
started. All dust and dirt that has settled on the priming coat shall be thoroughly
wiped away before painting is started.
The specifications described in painting shall hold good as far as applicable. The number
of coats to be applied will be as stipulated in the item. The painted surface shall present a
uniform appearance and glossy finish, free from streaks, blisters etc.
i. Preparation of surface:
Painting shall be done only when the surface is perfectly dry to permit of good absorption.
All dirt, dist or other foreign matter shall be removed from the surface to be painted. All
roughness shall be sand papered and cleaned.
ii. Application:
The preservative shall be applied liberally with a stout brush and not daubed with rags of
cotton waste. It shall be applied with a pencil brush at the joints of the wood work. The
first coat shall be allowed at least 24 hours to soak in before the second (the final) coat is
applied. The second coat shall be applied in the same manner as the first coat. The
excess of preservative, which does not soak into the wood, shall be wiped off with a clean
dry piece of cloth.
1.17 Water Proofing:
Chemical Waterproofing treatment on R.C.C Roof ( IS: 9103-1999)
General :- A selective product for making a cement based polymer modified water proofing slurry walling is applied to concrete and mortar surface to prevent water in filtration and as well as dampness.
Uses : It is used for external & chemical water proofing, hairline cracks sealing and protection from the chloride in structure as under.
(a ) Terrace and Balconies (b) Water tanks.
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Coverage: Two coats are required. The compound will require 0.8kg/m for two coats. In extreme case 3 coats may required.
Instruction for use:
(a) Surface preparation: Concrete, mortar or masonry surface must be clean and made free
from grease, oil , mud and loosely adhering particles. All surfaces must be on true flat as
far as possible. Surface preparation is essential to achieve high adhere quality.
(b) Mixing : A pre-batched mixture of good quality cement with clean find sand (500micros)
should be prepared with cement & sand in equal proportion by weight. This shall be
mixed with polymer complex in proportion of one part of polymer to four parts of cement
sand mixture to form a slurry. For consistency, the proportion of polymer should be
adhered. Mixing shall be done in a clear container by slowly adding the ponder
component to polymer and stirring with a slow spared mixer. Mixing should be done until
the slurry is free from lumps.
(c) Application : Dampen the surface immediately ahead of slurry application, while the
surface is still damp, apply the first coat and leave to harden for 6-12 hours. For slurry
consistency apply with a hard plastic bristled brush and broom. After the second coat has
been applied, finish by rubbing down with a soft dry sponge. For water proofing, slurry
should be applied to the rate of 3-4 kg/m for two coats depending on smoothness or
roughness of surface.
(d) Curing: Protect the freshly applied slurry against fire or sunlight and strong wind. Use
damp Hessian to aid curing for 3 days.
(e) Grading over the polymer base: Do not leave materials to Hessian before cleaning tools
and equivalent with wall. Left over materials can be removed mechanically. After
application of 2 coats or polymer mix with a sand and cement apply a coat of grading
plaster with average thickness of 20mm using mortar 1:4 using 2% compound of
approved make and quality in a continuous manner to protect the water proofing layer.
2. TECHNICAL SPECIFICATION FOR SANITARY & PLUMBING WORKS
2.1 Sanitary Ware & Allied Fittings:
2.1.1 General:
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All sanitary fixtures and their allied fittings should be of best quality, manufactured by
reputed manufacturer . These should be approved by the consultant / Engineer-in-charge
before use.
2.1.2 Squatting pattern W.C. pan (Orissa Pattern Closets)
The water closets shall be of vitreous china of specified size and pattern, integral flushing
rim. It shall have the flushing inlet at the back. The Orissa closets should be I.S.I marked of
approved quality conforming to IS –2556.
The squatting type Indian water closets (Orissa Closet) shall be sunk in floor sloped
towards the pan in a workmanship like manner. The closet shall be fixed on a proper
cement concrete base of 1:3:6 proportion, taking care that the cushion is uniform and even
without closet, to receive the specified thickness of the floor finishing. The joint between the
closet and the PVC. Trap shall be made with W.C. ring and rubbed lubricant and shall be of
leak proof.
2.1.3 Flushing Cistern:
The flushing of the Indian water closet (Orissa closet ) shall be done polystyrene high level
valve less symphonic flushing cistern ( PVC low level cistern) of approved brand and quality
I.S.I. marked and capacity as specified. The connection between the cistern and water
closet shall be made by 32 mm dia G.I. flush pipe, made from G.I. pipe ( Light quality) or 32
mm dia. PVC pipe as specified in the tender schedule. The flush pipe with an off set should
be fixed to wall using C.I. holder bat clamps. The capacity of the cistern should be 10 ltrs.
As per I.S.S. the cistern shall be fixed on cast iron or rolled steel /PVC cantilever brackets (
built in type) which shall be firmly embedded screwed in the wall, with C.C. M20. the cistern
shall be provided with 20mm dia PVC. Overflow pipe with fittings which shall terminate into
mosquito proof coupling secured in a manner that will permit it to be readily cleaned or
renewed.
2.1.4 WashHandBasin:
The wash hand basin shall be of the white vitreous china of approved quality, make and
brand I.S.I. marked. It shall be one piece construction with an integral combined overflow.
The size of the basin shall be as specified. Each basin shall be provided with one 15 mm
dia C.P. Brass pillar Tap, 32 mm dia C.P. waste C.P. chain and rubber plug, unions, joints,
C.P. Bottle trap casted PVC waste pipe complete in all respects of approved quality.
The basin shall be supported on a pair of R.S. or C.I. cantilever brackets (built in type) and
embedded and fixed in wall with cement concrete, M20. these brackets shall be painted to
the required shade with two coats of synthetic enamel paint over coat of priming. The waste
of the basin shall discharge into a floor trap of channel through bottle traps PVC waste pipe
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as specified. One 32 mm dia C.P. bottle trap is to be fixed to the waste of the basin, & the
outlet of the bottle trap is to be connected to the waste pipe to discharge the waste to the
aforesaid floor trap. The inlet connection to the basin shall be made with 450 mm long
15mm dia heavy type P.V.C. connection pipe.
2.1.5 Standing Urinals:
The urinals shall be flat pattern lipped front basin of required dimension of the white
vitreous china and one piece construction with internal flushing box, rim of an approved
make and brand as specified. It shall be fixed in the position by using wood unplug
embedded in the wall with screws of proper size. Each urinal shall be connected to a 40
mm dia PVC waste pipe which shall discharge into a channel or floor trap. The lip of urinal
shall be kept at 525 mm from floor level, while fixing the urinal on the wall.
Where no of urinals are fixed in a line, the distance between the center to center of each
urinal shall be kept 750mm and each urinal should be separated from one to other by a
partition plate. The center to center partition plates shall be kept 750 mm.
The partition plates shall be of one piece kota stone plates, cut to size or partition wall and
front corners rounded. The partition parttion plates are embedded in wall with cement
concrete and finished smooth. The bottom of the partition plates should be kept 500 mm
above floor level and top should be kept at 1250 mm above floor level. The plates should
project 600mm from wall surface. The width of the plates should be embedded inside the
wall and should not be less than 100 mm. The thickness of the plates shall be minimum of
25 mm to 32 mm. Thickness of partition wall should be limited to 150 mm including smooth
surface finishing.
For flushing the urinals each urinal shall be, connected with one 20 mm dia G.I. Pipe
(Midium class). One end of each of this pipe 15 mm PVC connection pipe shall be inserted
into the inlet of the Urinal and jointed with jute and putty where as the other end is
connected either with a tee or bend with water pipe line fixed on the wall horizontal above
the urinals. In each 20 mm dia flush pipe one 20 mm dia –gun-metal gate valve angle
stopcock to the fixed. By opening this valve, the water will flow to the rims of urinal through
the inlet pipe and flush the urinal. After flush, the valve can be closed to avoid wastage of
water. One 40 mm dia P.V.C. waste pipe shall be connected to the waste of each urinal, to
discharge the waste into the channel or trap. One end of this waste pipe shall be made a
cup size to fit into the projected waste and tightened with screws and waste clamp.
2.1.6 Squatting Urinal Plates:
The urinal plates shall be of white glazed vitreous china with integral flusuing rim of size
450 mm x 350 mm of approved make and brand as specified. There shall be white vitreous
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channel with stop and outlet pieces in the front. These plates shall be fixed on C.C. at 75
mm to 100 mm above floor level.
For flushing arrangement, one 25 mm dia G.I. common water pipeline(minimum s9ze) shall
be fixed on the wall parallel to floor. For each urinal one 20mm dia. G.I. Branch pipe shall
be taken down upto 12mm from floor level just at the center of each plate, in which one 20
mm dia gate valves is fixed at 1500 mm above floor level. At 1200m height, the 20mm dia
flash pipe shall be divided into two branches with a tee and fixed horizontal. 300mm on
either side and then with the help of elbows, both the branches shall be taken downward
and connected to the inlets of the urinal plates at floor level. By operating the valve as
above, the water will rush into the rims of the urinal plate and flush it.
Where there are number of urinals fixed in a line, each urinal should be separated by a
partition plate fixed in the centre of two urinal plates. The centre to centre distance of the
partition places shall be kept 750mm minimum.
The partition plates shall be of one piece kota stone plate, 25 mm to 52 mm thick, cut to
sizes and front corners rounded. The plates are embedded in wall with cement concrete
and finished smooth. The bottom of the partition plates wall shall be kept flushed to urinal
top level, the top level shall be kept at 1200 mm from the urinal plate top and the projection
from the wall shall be 600 mm. the width of the plate to be embedded inside the wall should
not be less than 100mm.
2.2 P.V.C. (S.W.R.) AND P.V.C. (Rigid) Pipes and Fittings:
2.2.1 General
The PVC (SWR) and PVC(Rigid), soil waste and vent pipes (spigot and socket, and
couples joints), shall be of make and brand as specified (under specification of materials)
confirming to I.S.S., B.S.S. and DIN are to be used.
The main specification of PVC, soil and waste pipes and fittings are as below.
a) Materials – unplaticised Poly vinyl Chloride (UPVC) b) Color –Grey. c) Dimensions –
i) diameter – fittings – 75mm. 110mm /63 mm and 634mm. ii) Pipes –75mm, 110mm, in lengths of 3 or 6 mtr.
d) Wall thickness - fittings – minimum 3.2 mm at any point Pipes – as per application. For rain water – 75mm – 1.8 to 2.2 mm
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110mm – 2.5 to 3 mm Waste and soil :- 75mm – 1.8 to 2.2 mm 110mm – 2.5 to 3 mm Underground drainage with Light / Nil traffics – 110 mm – 2.5 to 3 mm Under ground Drainage with Heavy traffic – 110mm –3.7 to 4.3 mm. e) Standards confirming to attributes Attributes Confirms to standard No. i. fittings and wall thickness - B.S. 4514. DIN 10531 DIN 10532, I.S. 7834 – PVC(Rigid) ii. Pipe wall thickness I.S. 4985 iii. Rubber ring IS 5382. iv. Fittings Dimensions DIN 19531 I.P.V.C. DIN19534 I (SWR) IS –7834 PVC (Rigid) v. Pipe dimensions IS –4985
2.2.2 Leaving instructions and joint procedure
i. Jointing a PVC (SWR) pipes and fittings.
Clean the outside of the pipes spigot and the inside of the sealing groove of the flitting.
Apply the rubber lubricant, to the spigot end, sealing ring and pass the spigot and into the
socket, containing sealing ring, until fully home. Mark the position of the socket edge with
the pencil on the pipe and then withdraw the pipe from the socket by approx 10 mm
towards thermal expansion gap.
ii.Fixing of the pipes and fittings on wall surface :
PVC pipes both (SWR) and (Rigid), fixed on wall surface, are to be supported by PVC pipe
clips specially made for these pipes. With horizontal runs. The pipe clips should be spaced
at intervals of more then 10 times the outside diameter of the pipes. In verticals of one
meter to a maximum of two meters according to pipe diameter or wherever specified.
iii. Jointing of P.V.C. (Rigid) pipe fittings.
Clean the outside of the pipes and inside of the socket of a fitting or the inside of the
couplers (where 2 plain ended pipes are jointed) of. Apply solvent cement solution, evenly
and smoothly on the outer surface of the pipe end and inside surface of either the coupler
or the socket and pass the pipe end into the socket of the fittings, up to the half depth on
the end of one pipe and the outer half of the coupler should be pushed to the end other
pipe and thus, both pipes are jointed.
iv. Fixing of P.V.C. pipes & fittings through holes of walls or chaja or roofs etc.
The wall / concrete slots should allow for a stress free installation, pipes and fittings to be
inserted into the slots, without a cement base, have to be applied first with a thin coat of
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P.V.C. solvent cement, followed by sprinkling of dry sand (medium size). Allow it to dry.
This process gives a sound base for cement concrete fixation, around the pipes / fittings
while mending the damages.
v. Antisyphonage Pipes
All the antisyphonage pipes and fittings to be used are of 63 mm. If these are not available
under the items of P.V.C. (SWR) materials, 63mm pipes and fittings, manufactured under
P.V.C.(Rigid) material can be used, since the raw materials for both is same.
vi. Installation of Traps
All traps should have a minimum water seal of 60mm as per I.S. 5329 AND i.s. 2552(Part –
XIII). Where anti-syphonage connection is required, the traps to be supplied and used
should have a 50 mm antisyphonage vent horn on the outlet side. All the traps used with
the closets, should be of the size 125mm x 110mm i.e. inlet (socket end) of 125mm and
outlet (spigot end) of 110mm only.
vii. Installation of water closet
Determine the correct location of the P/S trap and set it on a firm base, relative to the floor
finish by pouring concrete around on a slab. Bedding can be endured that the raps outlet is
left clear of concrete. Place the W.C. connector ring to the locketed pipe of 125/110 mm
R/S trap. Apply rubber lubricants on W.C. connector ring as well as outer side of water
closet (connection point) and now complete the joint by pushing the W.C. to home of
125mm socket of the trap.
viii. P.V.C.(Rigid) pipes and Fittings
63mm (O.D.) P.V.C. Pipes to be used for these works either in antisyphonage system or
else where, should be of “Quick Fit” pipes Class 2 (4kg F/cm2), quick Fit. Pipes have one
end socketted.
The P.V.C.(rigid) fittings, such as 63 mm elbow, 63 mm equal tee 110 x 63 mm reducer etc.
used in the work, should be of injection moulded fittings.
ix. One jointing rubber ring will be available, with each P.V.C.(SWR) pipe and fitting and
hence, the cost of the ring will not be added in the joint.
All pipes shall be measured net / length as laid or fixed and shall be measured over all
fittings such as bends junctions traps etc. the length shall be taken along the centerline of
the pipes and fittings. Fittings will be counted extra over.
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x. Fore fixing and painting, the pipe shall be tested hydraulically to a pressure 0.4Kg/cm2
for pipes under I.S. 1729 and at a pressure 0.7 Kg. Cm2 for pipes under I.S. 3989 with out
showing any sign of leakage, sweating of or other defect of any kind. The pressure
should be applied internally and shall be maintained for not less than 15 seconds.
2.3 WATER SUPPLY PIPES AND FITTINGS
2.3.1 Materials
P.V.C pipes of approved quality conforming to IS 1239& bearing ISI Marks,
manufactured by reputed firms and approved brands as specified.
2.3.2 Laying of Pipes.
The layout of the mains and service pipe set etc. will be done in accordance with
the drawings. The contractor is to mark out the exact position of the pipes and fittings at site
and take approval of the consultant / Engineer in –charge, before taking up the work.
Where the pipes are laid, underground these must not be laid less than 450 mm below
ground level and coated with one coat of approved black bituminous paint. For laying the
G.I. Pipes and Fittings below ground level, the width and the depth of the trenches for
different dimensions of the pipes shall be given as below :
Dia of pipe Width of Trench Depth of Trench
15mm to 50 mm 300 mm 600mm
65mm to 100 mm 450mm 750mm
The pipes shall be laid on a layer of 75 mm thick sand and filled up with sand and filled up
with sand up to 75 mm above pipes and the remaining portion of the trench shall then be
filled up with excavated earth with proper ramming as described in “Excavation and refilling
“. The surplus earth shall be disposed of as directed.
Thrust or anchor blocks of cement concrete !:2:4 in hard granite chips shall be constructed
on all `bends or branches to transmit the hydraulic pressure without impairing the ground
and spreading it over a sufficient area. Pipes shall not be laid to pass through manholes,
catch pit, drain. Where it is unavoidable the pipes shall be carried in sleeve pipes of M.S. /
G.I. as approved by the consultant / Engineer-in-charge. The rates should include such a
situation.
4. Where pipes run along walls, the same are to be fixed to the wall with holder bat clamps
/M.S. Hooks as below:
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Dia of pipe in mm 15 20 25 32 40 50
Horizontal Line 2m 2.5m 2.50m 2.503m 3m 3m
Vertical Line 2.5m 3m 3m 3m 3.5m 3.5m
Where the pipes are passing through the R.C.C. /Masonry wall / Column / beam of Pillars,
these must pass through the appropriate higher sizes of C.I. / G.I. Sleeve Pipes and are to
be included in the rates.
In case the Pipes are embedded in walls and floors it should be painted with one coat of
anticorrosive paint of approved quality.
All pipes should be fixed horizontal and vertical. For taking the pipes through the walls and
floors and roof slabs etc. the holes shall be made by filling with Chisel or jumper and not by
dismantling the brick work of concrete. After fixing, the holes shall be made god with
cement concrete 1:2:4 and properly finished with C. Plaster 1:4 to match the adjacent
surface.
Union Nuts are to be provided in each of the Vertical riser or drop on and from G.I. Tank
and near the Valve and as and where necessary.
The long screw fittings of 3 Mtrs. For long horizontal lines and inside the lavatory / kitchen
etc.,
After laying and jointing the Pipes and fittings shall be inspected under working condition of
pressure and flow. Any joint found leaking pipes should be removed and replaced without
extra cost. The pipes and fittings after they are laid shall be tested to hydraulic pressure of
6 Kg. Cm2. the test pressure should maintain without loss of for atleast half an hour.
2.3.3 Painting
On completion of the test, the exposed pipes and fittings are to be painted with two coats of
synthetic enamel paint of approved colour and brand over a coat of priming.
Measurement
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The length shall be measured in running meter correct to centimeter for the finished work,
which shall include the pipes and fittings such as Bends, Tees, Elbows etc., but excludes
Brass of Gun-metal fixture like Tap, Cocks, Valves, PVC connection Pipes etc.
2.3.4 Ball Valve
The ball valve shall be high class and shall confirm to I:S 1703. The nominal size of ball
valve shall be that corresponding to the size of pipe for which it is used. The ball valve shall
be of brass of gun-metal and the float for low pressure in Polyethylene and for high
pressure in copper.
Each and every ball valve while in closed position shall withstand an internally applied
hydraulic pressure of 20 kg /Cm2 for a minimum period of two minutes without leakage or
sweating.
Every high pressure ball valve when assemble in working condition, with the float immersed
to not more than half its volume shall remain closed against a test pressure of 10.5 Kg.
/Cm2.
Polyethylene floats shall be watertight and non-absorbent and shall not contaminate water
and with no jointing adhesive jointing parts.
The minimum thickness of the copper sheet used for making copper floats shall be of 0.45
mm. The thickness of materials of the float shall be uniform throughout.
2.3.5 Ferule:
The ferrules for connection with C.I. Main shall generally confirm to I.S 2692 and shall be of
nominal bore as specified. The ferrule shall be fitted with 3 screw and plug or value capable
or complete cutting off the supply to the connected pipe as and when required. For fixing
the ferrule the C.I. main shall be drilled and tapped during non-supply hour at 45o to the
connected pipe as and when required. The ferrule must be so fitted that no portion of the
sunk shall be left projecting with in the main on which it is fitted. After the ferrule is
connected, one C.I. bell mouth cover or with bricks ( as specified) shall be kept over the
ferrule to cover the ferrule to protect it and the cost thereof is to be included in the item,
even if there is not mention.
2.3.6 Non – return Valve (Check Valves)
The Non-return valve shall be of Brass or Gun-Metal and shall be of horizontal or vertical
flow type and of the size as specified and confirm to I:S 7810 and I:S 778. The
approximate weight of the valves are given below:
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Dia in mm Horizontal type in Kg. Vertical type in Kg.
15 0.30 0.25
20 0.55 0.25
25 0.90 0.75
32 1.25 0.90
40 1.70 1.20
50 2.90 1.45
65 5.25 2.15
80 7.70 4.10
Tolerance 5%
2.3.7 Foot Valve
Foot valve is generally placed at the lower and of the suction pipe of the centrifugal pump to
prevent the suction pipe from empting. Vertical non-return valve may also be fixed in place of foot
valve.
The foot valve shall confirm to IS: 038.
2.3.8 Water meters (Domestic Type)
Water meter up to 50mmm nominal size shall confirm to I:S 779. The meter body shall be bronze
/ Gun-Metal and marked to read in liters complete with registration box and lid. The water meters
shall be provided with Strainers. Strainers shall be of material which is not susceptible to
electrolyte, clean and shall be fitted on the inlet side of water meter. It shall be possible to remove
and clean the strainer and not permit disturbing the registration box. The offer should include the
same. The water meters shall bear ISI Mark.
2.3.9 Bibcock and Stop Cock
These shall conform to I:S 781 bear ISI Mark. The Bib cock is a draw off tap with a horizontal
inlet and free outlet and stopcock is a valve with a suitable means of connection for insertion in a
pipeline for controlling or stopping the flow. This shall be of screw down type. The cocks shall
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open in anti-clockwise direction. The stopcocks should be C.P. concealed stopcocks and C.P.
angle valves type as specified in tender schedule. Bib cocks should be also C.P. Brass hid cocks.
2.3.10 Full way Valve (Brass)
Full way valve is a valve with suitable means of connection for insertion in a pipeline for
controlling or stepping the flow. The valve shall be of brass fitted with a cast-iron wheel and shall
be of gate valve type confirming to I:S 780 brass rod latest one, opening full way and of the size
as specified.
The approximate weight of the valves are indicated below for guidance.
Dia in mm Flanged End valves in Kg. Screwed End valve in Kg.
15 1.021 0.567
20 1.503 0.680
25 2.498 1.077
32 5.232 1.559
40 6.082 2.268
50 6.691 3.232
65 10.149 6.840
80 13.381 8.845
2.3.11 Gun-Metal Full way Valve
This shall be of the Gun-Metal fitted with wheel and shall be of Gate-Valve type opening full way.
This shall confirm to I:S 778. Class I. The valves should bear I.S.I. Mark.
2.4 TECHNICAL SPECIFICATION FOR STONE WARE PIPE ETC.
2.4.1 Stone ware pipes (Materials)
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The S.W. Pipes and Fittings should be of Grade „A‟ confirming to I :S 651/1965. The pipes shall
be sound free from visible defects such as fire crack or hair crack and flaw or blister. The pipes
shall give a sharp clear line when struck with a light hammer and should be perfectly salt glazed.
Pipe in mm. Thickness of the Weight of Each
___________ Barrel in mm. Pipe in Kg.
100 12 14
150 16 22
200 17 33
230 19 44
250 20 52
300 25 79
350 30 100
400 35 125
450 38 147
The length of pipes are 600 mm exclusive of the internal depth of Socket.
2.4.2 Excavation of Trench for Laying Sewer Pipes:
The trenches for the pipes shall be excavated to the lines and level as directed. The bed of the
trench shall have to be evenly dressed throughout from one change of grade to the next. The
gradient is to stout by means of sight rails and booing rods and the required depth the excavated
at any point. The depth of the trench shall not be less than one meter, measured from top of the
pipe to the surface of the ground under roads and not less than 0.75 mtr. elsewhere. The width of
the trench shall be the nominal diameter of the pipe plus 400 mm. The bed of the trench if in soft
or made up earth, shall be well watered and rammed before laying the pipes and the depressions
if any shall be properly filled with sand and consolidated in 200 mm layer. Depending on soil
condition piling way even be necessary if so desired by the consultant / Engineer-in-charge. If
rock is met with, it shall be removed 150 mm below the level of the pipe and the trench will be
refilled with sand and consolidated.
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The excavated materials shall not be placed within one mtr. Or half of the depth of the trench
which ever is greater, from the edge of the trench.
The trench shall be kept from water, shoring and shuttering shall be provided wherever required.
Excavation below water table shall be done after dewatering the trenches.
After the excavation of the trench is completed foundation of cement concrete M20 in hard
granite metal ( size 25 to 40 mm) shall be laid with proper level all along under the length of the
pipe with hunching or all around concrete as per drawing.
Laying, jointing, hunching of the pipes and fittings. Drain Pipes( S.W. Pipes and other pipes used
for drain and sewer) shall be laid in straight lines and to the even gradients as shown in the layout
drawings.
The socket end of the pipes shall face upstream. Adequate care shall be exercised in setting out
and determining the level of the pipes and the Contractor shall provide suitable instruments,
templates, sight rails, boning rods and other equipments necessary for the purpose. In the case
of pipes with joints to be made with loose collars. The collars shall be slipped on before the next
pipe is laid. In those joints a tight ring of twisted jute tarred soaked in cement slurry filling to
ensure proper alignment and prevent. Cement entering the pipes. Cement compound joints is to
be finished with proportion 1:1 with 450 beveling. The joints are to be kept wet with wet bag until
the same are properly set with beveling. The cement mortar joints shall be cured at least for 7
(seven) days.
In the case of S.W. Pipe joints (socket and Spigot), they should be caulked first with tarred jute
(spun) of required diameter, almost quarter depth of the socket, after which cement mortar 1:3 is
pushed in with wooden chisel and finishing beveled at outside at 450. Instead of jute of hemp
rubber gasket of proper size may also be used. The whole joint must be cured for not less than
three days. In case of pipes less than 250 mm dia, joints should be made at ground level with
three pipes at a time and for larger ones two pipes at a time and after curing they should be soled
in foundation with the help of the ropes. All pipes should be properly hunched with cement
concrete 1:3:6 with hard granite metal of size 25 mm to 40 mm or otherwise specified as shown
in the drawing. Where the pipes are crossing the drain or road, all –round concrete 1:3:6 with
H.G. Metal of size 25 mm to 40 mm is to be done to 150 mm thick over the barrel of the pipe.
The whole of the drain work shall be tested when laid, and at the completion of the contract, to
the satisfaction of the consultant / Engineer-in-charge and shall be retested if necessary, until
found satisfactory. The test shall be made by means of water under pressure at the highest point
of the section under test and providing an air pipe at the lower end of the line. Maximum head of
5 )five) feet (1.5 Mtr ) must be maintained.
2.4.3 Excavation and refilling
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Excavation for drain and pipe trenches shall be straight and to the correct depth and gradient.
The trench bottom shall be of sufficient width to allow working space for pipe jointing.
Excavated materials shall be damped away from the side as directed by Engineer-in-charge.
Suitable precautions are to be taken to prevent inflow of water into the excavated area, during
construction.
The Contractor at his own expense shall pump out or otherwise remove any or all water, which
during the continuance of contract, may be found in the excavated trenches to keep the trench
clear of water during the work under progress.
No excavation for pipe line shall be filled and line covered, until the line therein has been passed
and tested.
2.4.4 Burried Services
All pipes, cable mains and other services exposed by the excavations shall be effectively
supported by timbering or other means for which no extra payment will be allowed. The
Contractor shall be responsible for any damage occurring to buried services and make good the
same at his own cost to the satisfaction of the Consultant / Engineer-in-charge.
2.4.5 Trench condition
Where a trench is excavated and refilled after laying the pipe, settlement of the earth in the
refilled trench take place. The filling above the top of pipe, settles relatively, more than the sides
of the trench, thereby developing frictional resistance. The contractor is required to take special
precaution against this while refilling the trenches, procedure for back filling as stipulated earlier
should be strictly followed.
2.4.6 Inspection chambers / Manholes
At every change of alignment, gradient or diameter of a drain, there shall be a manhole or
inspection chamber. The maximum distance between Manhole Chamber shall be 30 Mtrs. For
the lines laid straight.
All Manholes and inspection chambers shall have internal dimensions as shown on drawing and
B.O.S. the depth of invert shall be according to the gradient.
The foundation for Manhole shall be 150 mm thick and with cement concrete M20 in hard granite
well graded metal of 25 mm to 40 mm size. The concrete shall project 75 mm beyond the
external faces of the brick work.
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The brick masonry shall be done in cement mortar in the proportion of 1:4 and thickness of the
brick wall should be 250 mm thick upto 1200 mm depth from Ground Level and beyond that the
wall thickness shall be maintained 375 mm. Both the inside and outside surface of the walls of
the chamber, shall be finished with cement plaster 1:4 – In addition to this, the inside surface
should also be provided with cement punning.
On the top of base slab channeling on C.C. M20 with granite chips is to be done keeping the
diameter equal to the dia of drain pipe and depth equal to ¼th of the dia of the pipe. The channel,
should be done longitudinally at the center, connecting both the ends of the pipe. The channel is
to be hunched up with concrete M20 with hard granite chips of size 20 mm and below) sloping
upwards from the edge of channel to meet the side of chamber at gradient of 1:6. The channel
and benching are to be finished smooth and cement mortar 1:4 and punning.
Sewers of un-equal sectional area and branch sewers shall not be jointed at the same invert in a
Manhole inspection chamber unless it is unavoidable. The branch sewers should deliver sewage
in the Manhole in the direction of main flow and the junction must be made with case so that the
flow in the main is not impeded. Channels for drains coming from the side of the Manhole
chamber, shall be curved to meet the main drainage channels.
The Manhole and Inspection Chambers shall be covered with R.C.C. cover slab or thickness 100
mm to 150 mm according to the requirement at site. One C.I. Manhole cover of diameter and
weight as stipulated in the tender schedule shall be fixed, on the cover slab. Unless otherwise
mentioned the C.I. cover and Frames and shall confirm to I:S 1726. Heavy duty covers etc.,
under heavy vehicular traffic condition and capable of bearing wheel loads up to 11.25 Tor are to
be used and medium duty under light type wheel traffic loads and light duty for domestic
premises are to be used. Covers and Frames shall be clearly cast, double water seal type and
they shall be free from air and sand holes. The cover shall be gas tight and water tight with
proper water-seal. The C.I. Cover and Frame shall be coated with two coats of black bituminous
paint. The frame of Manhole cover shall be fixed on the slab while the slab is casted.
2.4.7 Gully Trap chamber
The size of Chamber for 1500 x 100 mm S.W. Yard gully shall be 300 x 300 mm (inside).
Foundation 100 mm thick in cement concrete m20 in hard granite metal of size 25 mm to 40 mm.
The foundation should project 75 mm, from outer surface of wall. Brick work in cement mortar 1
:4 /125 mm thick, depth upto 600 mm maximum. The finishing of masonry walls both inside and
outside should be done in cement mortar 1:4 Cement punning should be provided on the inner
surface. One C.I. frame and cover of (Clear Opening 300 x 300 mm wt. 7 kg. ) shall be fixed on
the top of Chamber, duly embedded in C.C. 1:2:4 with granite chips and finished with Cement
Plaster 1:4. The trap should be buried in cement concrete M20 in H.G. Chips upto the mouth and
one C.I. Grating of size 225 mm X 225 mm are to be fixed on the top of mouth of Gully Trap to
arrest rubbishes.
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3. TECHNICAL SPECIFICATION FOR ELECTRICAL INSTALLATION
WORK UNDER ICZMP-,ORISSA
3.1 General Requirements
The installations shall generally be carried out in conformity with the requirements of
Indian Electricity Act, 1910 as amended up to date and Indian Electricity Rules, 1956 framed
there under, the relevant regulations of the Electric Supply Authority concerned and also with the
specifications laid down in the Indian Standard IS:732/1963 "Code of Practice (Revised) for
Electrical Wiring Installations (System Voltage not exceeding 650V)". The work shall be executed
as per National Electrical Code and if any item is not covered there under or there is any doubt,
the specification approved by the Engineer-in-charge will be final and binding.
3.1.1 Ambient Conditions
All Electrical installations and equipments shall be suitable to work in following ambient
conditions.
Maximum Temperature : 50 degree Celsius
Relative Humidity : 100%
In the vicinity of : _________, Orissa.
System Conditions
The Electrical installations and equipments shall be suitable for operation in following
system conditions.
Supply voltage : 415 Volts +/-10%
Supply frequency : 50Hz +/-5%
Number of Phases : Three
3.1.1 Scope
3.1.2 Materials:-
All materials, fittings, appliances used in electrical installations shall confirm to Indian
Standard Specifications wherever these exist. A list of approved materials is attached in
annexure-I. Materials not included in the list as well as any particular make should be approved
by the Consultant or Engineer-in-charge before use. All required materials covered under this
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specification except mentioned otherwise clearly, shall be supplied and installed by the contractor
complete in all respect. The materials and accessories required for completing the work will form
part of the work although they have not been specified separately.
Selection of materials and installation work shall be such as to simplify operation,
inspection, maintenance and testing. The work shall include all reasonable precautions and
provisions for safety of operation and maintenance personnel.
3.1.3 Standard:-
(a) Unless otherwise specified, all materials covered under this specification shall be
designed, manufactured, tested and installed in conformity with the latest Indian
Standard Specifications. In case such Indian Standard Specifications are not
published equivalent British Standard Specifications shall be followed. All
equipments shall confirm to latest Indian Electricity Rules, PWD and Local/State laws
or byelaws as regards to safety, earthing and other essential provisions specified
therein.
(b) All equipments and materials selected shall also be supplied and installed taking into
consideration the Factories Act, Fire Regulations and Local laws or byelaws. All light
fittings and equipments selected shall be of well tied out design. All materials used in
the assembly of fittings and their accessories shall be of high quality and
manufactured in accordance with the best modern practice.
(c) All the materials supplied by the contractor according to the contract conditions will be
subject to inspection and approval by the Consultant or/and Engineer-in-charge or
their authorised representative from time to time. The contractor shall extend all
required facilities for such inspection free of cost. At the time of inspection, the
inspecting officer shall have full liberty to reject any such material, which does not
confirm to specifications or the requirements. No claim for any rejected materials shall
be entertained by the owner. The contractor shall remove all rejected materials from
the site at his own cost.
(d) No surplus material procured by the contractor will be accepted by the owner.
(e) The contractor will be responsible to get electrical installations inspected by the
Electrical Inspector of the State Government and to obtain the statutory clearance for
energisation. The owner, on production of documentary evidences, will reimburse the
necessary inspection fees.
(f) The contractor should possess valid electrical contract licence and labour licence
issued by the appropriate statutory authority of the State Government during the
execution of the contract.
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3.1.4 Inspection and Approval
The contractor shall put up samples of all major items for inspection and testing by the
Consultant and/or Engineer-in-charge for which the contractor shall furnish minimum 10 days
clear notice in advance to enable them to depute their Inspecting Officer. Similar procedure shall
be adopted for the approval of s
Samples of minor materials/ accessories to be used for the work.
3.2.0 GENERAL TECHNICAL SPECIFICATION OF MATERIALS
3.2.1 Switches & Plug Sockets:-
All switches, 5A plug sockets, power plug sockets, TV sockets and Telephone sockets
shall be flush mounting type with ISI mark of approved make. The switches and plug sockets
shall confirm to IS:3854/1988, IS:1293/1988, IS:6538/1971 & IS:4615/1968.
3.2.2 Fan Regulators & Dimmers:-
Electronic type fan regulators and light dimmers of approved make shall generally be used
and shall be of flush mounting type.
3.2.3 Wires:-
The wires used for internal electrical wiring shall be of single core PVC insulated sheathed/
unsheathed 1100V grade stranded copper/ aluminium conductor wires (suitably colour coded to
distinguish different phases and neutral) of approved make with ISI mark. The wires shall
confirm to IS:694 (Part-I & Part-II)/1964. The minimum cross sectional area of conductors for the
different uses shall be as specified below.
(a) Lighting point wiring : 1.5sqmm Copper or 2.5sqmm Aluminium.
(b) Power point wiring : 2.5sqmm Copper or 4.0sqmm Aluminium.
(c) HPSV/HPMV Luminaries : 2.5sqmm Copper or 4.0sqmm Aluminium.
(d) Circuit wiring : 2.5sqmm Copper or 4.0sqmm Aluminium.
(e) Sub-main wiring : 4.0sqmm copper or 6.0sqmm Aluminium.
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3.2.4 Non-Metallic Conduit and Accessories:-
All non-metallic conduits shall confirm to IS:2509/1963 and their accessories to
IS:3419/1965. The conduits may be either threaded type or plain type and shall be used with the
corresponding accessories.
3.2.5 Switch Boxes:-
Metal boxes for switchboards shall be made of GI. sheet and round junction boxes shall be
made of cast iron. The minimum wall thickness of GI. boxes shall be 1.5mm (16swg) and cast
iron boxes shall be 3mm. Fan hook boxes shall be made of m.s./GI sheet of 1.5mm wall
thickness with a 10mm round steel hook inside. The size of the fan hook box shall be 150mm dia
and 65mm high. All GI boxes shall have not less than 4 screwed holes for fixing the top cover
and a earthing stud. All metal boxes shall be provided with a cover of phenolic laminated sheet
(Bakelite sheet), not less than 3mm thick fastened to the box with brass screws and cup washers.
The covers should have a minimum overlap of 12.5mm on all sides of the box for concealed
wiring. The boxes shall be painted both inside and outside in case of m.s., with two coats of
anticorrosive primer and two coats of enamelled paint of approved shade. Adequate numbers of
half punched holes shall be provided for conduit entry.
The following sizes of GI boards shall normally be used unless otherwise specified.
Switch board size
Length Breadth Height
100mm 100mm 50mm
100mm 100mm 65mm
150mm 100mm 65mm
200mm 150mm 65mm
250mm 200mm 65mm
300mm 250mm 65mm
450mm 300mm 65mm
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3.2.6 Angle/ Batten/ Pendant Holder & Ceiling Rose:-
Brass or Bakelite type 5A, 250V, Angle Holders, Batten Holders, Pendant Holders & three way
ceiling rose confirming to IS:732(Part-2)/1982 & IS:371/1979 of approved make and design with
ISI mark shall be used.
3.2.7 Distribution Boards:-
All the L.T. Distribution Boards shall be suitable for operation in 3 phase/ single phase,
415/240 Volts, 50Hz, neutral grounded at transformer system and a short circuit level of not less
than 35MVA at 415 Volts. All Distribution Boards shall generally confirm to all relevant Indian
Standards amended up to date.
Distribution boards shall be of wall/ floor mounting type and totally enclosed having hinged
doors, dust, damp and vermin proof construction. These should be made out of CRCA sheet
steel and the enclosure should be acid treated for rust proofing, thoroughly cleaned, painted with
two coats of anticorrosive primer and two coats of white enamel paint for interior and industrial
grey enamel paint for exterior. All doors and covers shall be fully gasketed with neoprene PVC
strips and shall be lockable. All the hinged doors shall be effectively earthed with flexible copper
wires. Cadmium plated fixing screws shall enter holes tapped into an adequate thickness of
metal or provided with hank nuts. Self-threading screws shall not be used.
The distribution boards shall be of adequate size with a provision of 25% spare space to
accommodate possible future additional switch-gears. Knock out holes of appropriate sizes and
number shall be provided on detachable plates in the board in conformity with the location of
incoming and outgoing cables/ conduits. The switches shall be so arranged that fuses are not
alive when the switch is in OFF position. No apparatus shall project beyond and edge of the
panel. No switch body shall be mounted within 25mm of any edge of the panel and no holes,
either than meant for fixing the panel shall be drilled within 13mm of the edge of the panel. The
various live parts shall be effectively screened by barriers of non-hygroscopic, non-inflammable
insulating materials or shall be so spaced that an arc can be maintained between such parts and
earth. All items of switch-gears shall be readily accessible and all connections, including those to
instruments and apparatus, be easily traceable.
The busbars and interconnections shall be of electrolytic annealed copper/ high
conductivity electrolytic wrought aluminium of rectangular cross section suitable for carrying full
load current for phases & neutral busbars and shall be extensible on either side. The maximum
current density shall be 1.00 Amp/sqmm for Aluminium and 1.25 Amp/sqmm for copper busbars.
The busbars shall be supported on SMC/ DCM/ Glass fibre reinforced polyester, non-breakable
non-hygroscopic insulators at regular intervals to withstand the forces arising from short circuit in
the system. All busbars shall be provided in a separate chamber and properly ventilated. The
minimum clearance between the phases shall be 25mm and between phase and earth shall be
20mm. The interconnection between busbars and switchgears of rating above 63A shall be
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through strips having 125% of the switch-gear current rating. All busbars shall be suitably
insulated by means of heat resistant PVC sleeves or PVC insulating tapes and colour coded in
phase sequence of R-Y-B & N. The entire busbar shall be covered on the front with a Bakelite
sheet barrier. In longer sections of busbars, provision shall be made for thermal expansion by
providing flexible joints made out of multi-foil thin copper/ aluminium foils. All joints shall be of
clamped type as far as possible else of bolted construction with double cover fish-plates.
All connections between pieces of apparatus or between apparatus and terminal on a
board shall be neatly arranged in a definite sequence, following arrangements of the apparatus
mounted there on, avoiding unnecessary crossings. Wire interconnections shall be colour coded
and connected to terminals only by soldered lugs, crimped lugs without cutting away the strands.
No interconnecting wires shall come in contact with the live busbars other than the terminal
points. The arrangement of busbars shall confirm to IS:375/1963.
An enamelled danger notice plate shall be provided on the boards connected to medium
voltage supply & above.
Adequate space shall be provided for accommodating various instruments. These shall be
accessible for testing and maintenance without any accidental contact with live parts of circuit
breakers, switch-gears, busbars and interconnections. The indicating lamps shall be provided
with individual switch and fuses. The voltmeters shall be provided with fuses for each phase. The
control wires shall be of 2.5sqmm copper for CT circuits and 1.5sqmm copperfor the rest. The
control wires shall be neatly bunched together inside PVC trunking securely fasten to the
compartment properly marked with ferrules at the end. A separate tamper proof compartment
with locking arrangements as per the requirements of the supply authority shall be provided for
housing of the energy meters.
(a) Branch Distribution Boards (BDB):-
The branch distribution boards shall be surface mounted or concealed type and made out
of 1.6mm (16 swg) CRCA sheet steel. At least one number hexagonal earthing stud for single
phase BDBs and two numbers earthing studs for three phase BDBs shall be provided. The
components of the BDBs shall be mounted on a detachable 2mm thick CRCA sheet steel frame
works for easy maintenance. The minimum size of wires to be used as interconnecting wires
shall be 2.5 sqmm copper or 4.0 sqmm aluminium. Each outgoing circuit of the BDB shall be
provided with a fuse/ MCB on the phase or live conductor. The earthed neutral conductor shall be
connected to a common link and be capable of being disconnected individually for testing
purpose. Door interlocking with MCBs shall be provided such that doors shall open only with
MCBs in OFF position. All the live parts inside the BDB shall be covered with a Bakelite sheet
with at least 3mm thick.
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(b) Main Distribution Boards and Sub Distribution Boards:-
The Main Distribution Boards (MDB) and Sub Distribution Boards (SDB) shall be wall
mounted or floor mounted type and made out of 2.0mm (14swg) CRCA sheet steel. In case of
wall mounted boards the entire sheet steel enclosure shall be mounted on a m.s. angle frame
work with adequate fixing arrangement for grouting. In case of floor mounted boards the
enclosure shall be fixed to a m.s. angle framework with m.s. base channels. All the incoming and
outgoing switch-gears and breaker other than MCBs shall be fixed in separate compartments.
All switch-gears above 63A rating and breakers shall be provided with door interlocks so as
to open only in OFF position. All MCCBs shall be provided with external operating handle. The
ON, OFF, TRIP (where available), Rating marking and nomenclature plates shall be provided
near operating handle. A continuous earth bus made out of Galvanised Iron or Aluminium strips
of adequate size shall provided at the bottom of panel for the entire length. Arrangement shall be
made at both the ends of earth bus for easy entry and termination of earthing lead from external
earth installations.
Cable compartments of adequate size shall be provided for easy termination of all
incoming and outgoing cables entering from bottom or top. Proper cable supports shall be
provided in cable compartments. All incoming and outgoing terminals shall be brought out to
terminal blocks or to a extended rigid strip directly from the switch-gear/ breaker. Separate cable
compartments shall be provided for incoming and outgoing cables. Ventilation arrangement in the
form of finely divided wire mesh shall be provided at both sides towards the top.
3.2.8 Miniature Circuit Breaker (MCB):-
The miniature circuit breakers of approved make shall be ISI marked and capable of
withstanding minimum 25000 switching operations and fully automatic with provision of thermal
and magnetic tripping arrangements. All MCBs shall be of minimum 9KA short circuit rating and
confirm to IS:8828/1993 & BS:3871.
3.2.9 Changeover Switches:-
The changeover switches shall be load break types having three distinct position of
operation. The ON and OFF positions of the switch shall be clearly indicated. The door interlock
with defeat mechanism shall be provided for switch units confirming IS:8623/1977. The
changeover switches shall confirm to IS:4064/1978 and IEC:408 and bear ISI mark.
3.2.10 Rewire able Fuses
The re-wire able fuses (Kitkat) shall be semi-enclosed type consisting of a re-wireable fuse
carrier and fuse base and shall be made out of either porcelain or Bakelite. The breaking
capacity of these fuses shall be 4000 Amp on 400 Volt. These shall bear ISI mark.
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3.2.11 Energy Meters (KWH Meter)
The Energy Meters (KWH meter) shall be either whole current or CT operated type.
These shall be duly tested and calibrated by the supply authority prior to fixing and necessary test
certificate shall be furnished.
3.2.12 LT Power Cables
The LT power cables shall be of PVC insulated and PVC sheathed, 1100 Volt grade,
single core or multi core, un-armoured or GI wire / strip armoured, stranded aluminium conductor
cables of approved make and should bear ISI mark. The armoured cables shall confirm to
IS:1554(Part-I)/1976 and un-armoured cables to IS:694/1977.
3.2.13 Fluorescent Fittings
The Fluorescent fittings shall be of the following type.
(a) Box type fitting
All Fluorescent fittings shall be of approved make and in general confirm to IS:1913/1969.
These shall be complete with all standard accessories as per specification such as choke,
capacitor, starter and lamp holder etc duly factory wired. Provision shall be extended to earth all
the metallic part of the fixtures and all the detachable metal parts such as stove enamelled
reflector of industrial fitting, metallic louver of mirror optic fitting etc shall be provided with loop
earthing by flexible wire. The choke shall be copper wound and polyester filled. Powerfactor
improvement capacitor shall be provided confirming to IS:7752(Part-I)/1975 and of such rating to
improve the power factor to 0.9.
3.2.14 Incandescent Fittings
The Incandescent fittings shall be of the following type.
(a) Ceiling flush type
(b) Bulk head type
These shall be complete with all standard accessories as per specification and provision
for earthling the metallic parts of the fitting.
3.2.15 Street Light Luminaries
The street light luminaries shall be of the following types.
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(a) HPSV street light fitting
These shall be of approved make complete with all standard accessories as per
specification such as ballast, capacitor, igniter, starter, lamp holder etc and shall have provision
for earthling of all the metallic parts of the fitting. The luminaries shall in general conform to
IS:10322 (Part-1 to Part-5).
3.2.16 Ceiling Fans
The a.c ceiling fans shall be of approved make & brand and suitable for operation on
230V 50Hz single-phase supply. The fans shall consist of all standard accessories such as
300mm long down rod, canopies, shackle, 3 or 4 fan blades, capacitors etc but excluding speed
regulator. The fan motor shall be of permanent capacitor run totally enclosed with double ball
bearing and the winding shall be made of super enameled copper wire with class-E insulation.
These fans shall confirm to IS:374/1979 with amendment number 1, 2 & 3.
3.2.17 Exhaust Fans
The exhaust fans shall be of approved make & brand and suitable for operation on single/
three phase 230/ 415V 50Hz supply. The fans shall consist of all standard accessories such as
impeller blade, fixing frames, capacitors, anti vibration pads etc. The exhaust fan motor shall be
of permanent capacitor run, continuous rated, totally enclosed with double ball bearing and the
winding shall be made of super enamelled copper wire with class-A /class-E insulation. Sound
level of the exhaust fans shall not exceed 60db for domestic application and 65db for industrial
application. Gravity louver shutters made out of aluminium sheets with a steel frame/ wire guard
shall be provided with these fans. These shall have IP:44 degree of protection. The exhaust fans
shall bear ISI mark and confirm to IS:2312
3.3.0 INSTALLATION
3.3.1 Portions of Wiring
3.3.1a Point Wiring
Point wiring shall consist of a switch on the board and wiring up to termination point via
the control switch and neutral. These termination points can be :
(a) A ceiling rose or connector in case of call bell or ceiling fan or exhaust fan point wiring.
The wiring from ceiling rose or connector to ceiling fan or exhaust fan point shall be
considered with the installation of fans.
(b) A ceiling rose in case of directly fixed type fluorescent fixtures, suspended pendants.
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(c) A back plate in case of suspended type fluorescent fixtures, suspended or stiff pendants,
wall brackets, bulk heads, spot light similar fittings.
(d) A lamp holder in case of angle or batten holders.
(e) A convenient wall plug in case of plug on board or separate board points.
Wiring for light points and fan points shall be carried out with minimum 1.5 sqmm copper
stranded conductor wire. For the purpose of measurement the points are classified as below
wherever specified.
(a) Short points : Up to 3.0m long
(b) Medium points : 3.0m to 6.0m long
(c) Long points : 6.0m to 10.0m long
(d) Special long points : Above 10.0m long (As specified)
Where classification of points are not specified, the point wiring shall mean wiring to the
all types points as described above irrespective of the length of the point.
The wiring whether concealed or surface shall be easily accessible for inspection. Power
and Heating sub-circuits shall be kept separate and distinct from lighting and fan sub-circuits.
The balancing of circuits in three phase installations shall be arranged before hand. Circuits of
different phases of a.c. system shall be kept minimum 2.0m apart or enclosed in earthed metal
casing. Medium voltage wiring and associated apparatus shall comply, in all respect, with the
requirements of rules 50, 51 and 61 of Indian Electricity Rules, 1956.
The position of runs of wiring and the exact position of all points, switch boards,
distribution boards shall be marked in the building for approval of Engineer-in-charge prior to
execution. The wiring shall be carried out in looping back system in which the phaseconductor
shall be looped at the switch box and that of neutral at the junction box and point terminals. In no
case, joint shall be made bare or by twisting the conductors.
Lights and fans may be wired on a common circuit. Such circuit shall not have more than
a total of either 10 points or a load of 800 watts.
For the purpose of determining load per circuit, the following rating for points shall be
assumed.
(a) Light points (Incandescent) : 60 watts
101 NSP/CW
(4' fluorescent tubes) : 40 watts
(2' fluorescent tubes) : 20 watts
(b) Ceiling fan points : 80 watts
(c) Exhaust fan points : 80watts
(d) 5Amp plug points : 100 watts
(e) 15Amp plug points : 1000 watts
Unless and otherwise specified, the following minimum mounting height of the bottom
most part of the fittings and fixtures from finished floor level shall be maintained.
(a) Distribution Boards : 2.130 metre
(b) Switch board : 1.300 metre
(c) 5A & 15A plugs on separate
board
: 0.300 metre
(d) Ceiling fan : 2.750 metre
(e) Light fittings : 2.600 metre
(f) TV antenna and Telephone
outlets
: 0.300 metre
3.3.1b Circuit Wiring
Circuit wiring shall mean wiring from BDB/ SDB upto the junction boxes for switch boards
containing 5A/15A switches and plugs. For the purpose of measurement, in case of multiple
switch boards under one circuit, the circuit wiring shall mean the sum of the length of wiring from
BDB/ SDB upto junction box of first switch board and junction box of first switch board to the
junction box of next switch board and so on. The minimum size of conductor for circuit wiring
shall be 2.5 sqmm copper or 4.0 sqmm aluminium. A circuit shall not contain more than 2 number
power plugs. If not specified in point wiring to power plugs, the wiring to the same shall be treated
as circuit wiring.
102 NSP/CW
3.3.1c Sub-main Wiring
Sub-main wiring shall mean wiring from Main switch/ Meter board upto BDB/ SDB. The
minimum size of wire shall be 4.0sqmm copper or 6.0sqmm COPPER. There shall be no jointing
of wires as far as practicable. PVC ferrules shall be provided at both the ends of the wire for easy
identification.
3.3.2 Types of Wiring
3.3.2a Concealed Non-metallic Conduit Wiring
The concealed non-metallic conduit wiring shall be completed in the following three
phases.
(a) Conduit laying in roof before casting.
(b) Conduit laying in walls & fixing of switch board before plastering.
(c) Wire drawing inside conduit, fixing of switch, socket accessories, testing of
installations complete.
The size of conduit shall be so chosen that the wires provided inside shall not occupy
more than 50% of the cross sectional area. The maximum permissible number of single core
wires, which can be drawn inside non-metallic conduit, shall be as per the table given below.
Size of wire in mm2 Size of conduit in mm
(Maximum no. of wires permissible)
Remarks
16 20 25 32 40 50
1.0 mm2 5 7 13 - - -
1.5 mm2 4 6 10 - - -
2.5 mm2 3 5 10 - - -
4.0 mm2 2 3 6 10 - -
6.0 mm2 - 2 5 9 - -
103 NSP/CW
10.0 mm2 - - 4 7 9 -
16.0 mm2 - - 2 4 5 -
25.0 mm2 - - - 2 4 6
35.0 mm2 - - - - 2 5
50.0 mm2 - - - - 2 3
A detail conduit route layout avoiding unnecessary crossing shall be prepared by the
contractor and get it approved from Engineer-in-charge prior to laying of conduit in roof slab. The
conduits and junction & fan hook boxes shall be rigidly tied to the reinforcement of the slab.
Minimum 75mm x 75mm size sheet metal inspection cum pull box shall be provided within 5
metre run of conduit. Suitable type expansion joint fittings shall be provided along the conduit run
crossing the expansion joint of the building. The junction boxes shall be provided 300mm off the
centre for 4' long tube light fitting and 150mm off the centre for 2' long tube light fitting. Dummy or
spare conduits shall be laid wherever required as per direction of Engineer-in-charge.
The drops from the roof slab in walls and columns shall be made vertical as far as
practicable. Horizontal run of conduit on brick or stone masonry walls shall be avoided. The
conduit and the switch boards shall be fixed in the wall by cutting chase and neatly finished with
plastering after fixing. All curves in the conduit pipe shall be made by bending pipe with a long
radius which will permit easy drawing of conductors. The m.s. boxes shall be provided with
temporary covers to safe guard against filling of cement mortar etc within the tendered cost.
The wires shall be properly colour coded and carefully drawn inside the conduit through
use of fish wire. All the metal boards shall be suitably earthed by earth continuity conductor. All
Conductors shall be provided with cable sockets at termination points expect at switchboard
looping and joint boxes. Wires carrying current in a conduit shall be so bunched that the outgoing
and the return wire are drawn into the same conduit. Wires of different phases from different
circuits shall not run in one conduit. In three phase installation, plans shall be made for
balancing of loads in all phases before commissioning.
3.3.3 Cable Laying & Installation
The cables shall be of approved make and tested at factory in presence of Engineer-in-
charge or his authorised representative. The cables shall be despatched to the work site packed
on wooden drums with both ends properly sealed. Jointing of the cables in between the terminal
points shall be avoided as far as possible. For longer length of cable exceeding the normal length
of manufacture, cables may be joined by means of jointing kits only. The cables shall be tested
for insulation resistance by 500-volt insulation Megger for cables upto 1100 volt grade and by
104 NSP/CW
2500 volt insulation Megger for cables beyond 1100V grade prior to laying of the same. Cable
loops for future requirement shall be kept at both ends as per direction of the Engineer-in-charge.
One number 6 swg G.I. wire in case of single phase 230V a.c. system and either 2
numbers 6 swg G.I. wire or 2 numbers suitable size G.I. flat in case of multi phase 400V or
more a.c. system shall run all along the trench or tray with the cables as earth continuity
conductor. The supply and laying of earth continuity conductor such as G.I. wire or flat has been
considered separately in the schedule of quantity.
Minimum bending radius for PVC insulated armoured cables shall be 1200mm. At joints
and terminals, the individual cores of multi-core cable should never be bent so that radius of
bending is less than 12 times the overall diameter of the cable.
Wherever more than one cable shall exist, suitable marker tags inscribed with cable
identification details shall be permanently attached to all cables in the man hole, pulpits, joints,
open ducts, underground cables etc at suitable intervals.
The laying and installation of cable shall be carried out as per IS:1255/1983. The
methods of cable laying shall be of following types depending upon the requirements.
(a) Laying directly under ground
(b) Laying inside ducts
(c) Laying on racks or trays in air
(d) Laying along building structural elements
3.3.3a Laying Directly Under Ground
Cable trenches shall be excavated cutting all types of soil and rock upto a minimum depth
of 750mm for L.T. cables & 1200mm for H.T. cables and of appropriate width (not less than
350mm) to accommodate the cables and cable protecting materials within the tendered rate.
The sides and bottom of the trench shall be dressed and filled with 75mm thick layer of
fine sand. The cables shall then be laid with bricks on both side of each cable continuously along
the length. Space between the bricks shall be filled with fine sand upto 75mm above the top of
the cable. The top layer bricks shall be placed side by side continuously as protective cover. The
horizontal distance between the adjacent cables shall be minimum 200mm. The clearance
between the outer cable to the sides of the trench shall be at least 150mm.
105 NSP/CW
In case of multiple tiers, same procedure shall be applied keeping a vertical clearance of
300mm among the tiers and the top most layer shall be kept at a depth of 750mm for LT cables
and 1200mm for H.T. cables from finished ground level.
The trench shall then be filled up with the excavated materials free from stone or sharp
edged debris and duly compacted. A crown of earth neither less than 50mm nor more than
100mm in the centre and tapering towards the sides of the trench shall be left to allow for
subsidence.
Cable route markers shall be installed at salient and strategically located points parallel to
and 500mm or so away from the edge of the trench for easy identification of cable routes at a
maximum interval of 10 metre for straight run.
In locations such as road crossing, pipe line crossing, entry to buildings or poles in paved
area etc, the cables shall be laid in pipes or closed ducts. Pipes provided for entry to building
shall slope upward to prevent entry of water to the building. Stone ware, cast iron, NP-2 class
RCC pipes or medium class M.S./G.I. pipe of appropriate diameter shall be laid during the
construction to avoid damage later on.
In case of stone ware pipes, a 100mm thick 1:3:6 cement concrete covering shall be
provided. In case of cast iron or RCC pipes no concrete covering is required. The collars in case
of RCC pipes shall be embedded by 1:2:4 cement concrete. Top surface of pipe shall be at a
minimum depth of 1.0 metre. The minimum size of hume pipes shall not be less than 100mm in
diameter for a single cable and not less than 150mm for multiple cables.
The diameter of the cable protecting pipes shall be at least 1.5 times the outer diameter
of the cable. In one pipe, single core cables shall not be laid individually but instead, all the
three/four cables of the same system shall be laid.
3.3.3b Laying along Building Structural Elements
Cables can be routed inside the buildings along the structural elements such as walls,
columns etc or inside trenches or hume pipes or G.I. pipes under floor. The cables shall be laid or
fixed along the wall or column with the help of M.S./G.I. flat clamps or saddles with an interval not
exceeding 0.5 metre. The cables inside brick masonry trenches shall be laid on racks or directly
above the floor of the trench and the trench shall be covered with m.s. chequred plates. In case
of laying inside hume pipes or G.I. pipes, man hole chamber with RCC cover shall be provided at
suitable location for easy maintenance. The cables shall not intersect each other along its route.
3.3.4 Jointing of Cables
The quality of joints shall be such that it does not add any resistance to the circuit. The
materials and techniques employed for jointing should give adequate mechanical and electrical
106 NSP/CW
protection to the joints under all service conditions. The joints shall be resistant to all corrosion
and chemical reactions. The following three basic types of cable joints shall be used.
(a) Straight through joints
(b) Tee or branch joints
(c) Termination or sealing joints
3.3.5 Installation of Distribution Boards
All main switch-gears shall be installed in dry situation as near as possible to the point of
supply. The neutral wires shall be continuous except at the linked switch-gear. Main distribution
boards shall be installed in well-ventilated rooms or cupboards accessible to only authorised
persons or recessed having locking arrangement. The distribution boards shall not be installed in
damp situations, in the vicinity of storage batteries, places exposed to chemical fumes or
where inflammable or explosive dust, vapour or gas is likely to be present. These boards shall
not be erected above gas stoves, sinks, in bath rooms, lavatories, toilets, kitchens, places
exposed to weather or within 2.5 metre of a washing unit in the washing rooms and wash basins.
Fixing of distribution boards in places likely to be exposed to weather, drip or abnormal
moist atmosphere shall be avoided. Where it is unavoidable, outdoor distribution boards with
outer casing on the switch boards shall be installed making it weather proof and shall be provided
with gland or bushings or adapted to receive screwed conduit according to the manner in which
cables are run.
The indoor distribution boards shall be mounted concealed or semi-concealed or surface
to the wall or on foundations above the floor. The panels shall be so mounted that it is accessible
for fuse replacement and operation of switch-gears & breakers.
The top most height of the panel shall not be more than 2 metre from the floor level. In
case of Branch Distribution Boards shall generally be installed at a height of 2.13 metre from
finished floor level. A minimum clearance of 1 metre shall be provided from the surface of door
opening of the boards for maintenance.
All distribution boards shall be marked lighting or power, voltage, number of phases of
supply, circuit list, current rating of the circuit and rating of fuse element. All wiring and
terminations shall be provided with cable lugs and neatly arranged.
Adequate space shall be provided on bottom or top or back as required for easy cable
and conduit entry. The cables shall be terminated at the distribution board with corresponding
size of brass cable gland. The glands shall be fixed tightly to the panel without allowing any gap
or opening on the hole. The armours of the cable shall be suitably earthed. For conduit entry,
107 NSP/CW
PVC couplings for non-metallic flexible conduit and brass coupling for G.I. flexible conduit shall
be used. No holes shall be kept open on any side of distribution board.
Distribution boards shall be earthed at two points from two separate & distinct earth
electrodes in case of three phase boards and one point in case of single phase boards effectively
by means of G.I. wire or flat as specified.
3.3.6 Installation of Fluorescent Fixtures
The fluorescent fixtures shall be either directly fixed on walls or ceiling or suspended from
ceiling of buildings. The contractor shall make proper marking for alignment and level of fitting as
per the drawing prior to installation and get it approved from Engineer-in-charge. The contractor
shall assemble and install the fittings as per the manufacturer's instructions. Connection from
ceiling rose or connector shall be done with 3 core 1.5 sqmm flexible copper cord. Each fitting
shall be effectively earthed.
For fixing the fitting directly on walls and ceiling, the same shall be fixed on two numbers
seasoned wooden round blocks. The round blocks shall be duly painted and fixed to wall or
ceiling by means of PVC fill plugs and screws.
In case of fitting being suspended from ceiling, the same shall be fixed by means of two
numbers 16 swg stove enamelled m.s. conduit down rods along with cast aluminium ball sockets,
conduit check nuts, circular Bakelite cover etc. The down rods shall be painted with 2 coats of
enamel paint of approved shade. The fixing arrangement to the ceiling shall be capable of
sustaining the entire load of fitting and down rod. The minimum mounting height of the fitting shall
not be less than 2.5 metre from the finished floor level.
3.3.7 Installation of Incandescent Fittings
The incandescent fittings shall be rigidly fixed to wall or ceiling using Bakelite sheet. The
metal parts of the fitting shall be effectively earthed by the earth continuity conductor. The flexible
pendants, chandeliers etc shall be suspended from a hook provided in the slab during casting.
The bulkhead fittings shall be recessed/ surface mounted on wall or ceiling.
3.3.8 Installation of Street Light Fittings
The street light fittings shall be fixed by means of either suitable G.I. bracket or on arms
of tubular pole. The G.I. bracket shall be fixed by means of minimum two pairs of m.s. flat clamps
duly painted. Loop-in-loop-out junction boxes shall be embedded inside the bottom foundation
of the support wherever required. The wiring to the fitting shall be carried out by minimum 2
core 2.5 sqmm PVC insulated stranded copper wire along with 16 swg hard drawn bare copper
earth continuity conductor. The fitting shall be assembled and mounted as per the manufacturer's
instructions.
108 NSP/CW
3.3.9 Installation of Ceiling Fans
Unless otherwise specified, the bottom most part of the ceiling fans shall normally be kept
at a height of 2.75 metre above finished floor level. In no case, it shall be lower than 2.4 metre
above the finished floor level. A minimum clearance of 300mm shall be maintained from the
ceiling/beam to the plane of fan blades. The mounting height of all ceiling fans installed inside a
hall or room shall be same. The metal parts of the ceiling fans shall be effectively earthed. The
fans shall be assembled and mounted as per the manufacturer‟s instructions.
The wiring to the ceiling fan from the nearest point shall be carried out with 3 core 1.5
sqmm PVC insulated stranded copper conductor cords. The down rod & clamp shall be painted
with enamel paint of approved shade without involving any extra cost. Round Bakelite sheet shall
be provided on the fan hook boxes.
3.3.10 Installation of Exhaust Fans
Exhaust fans shall be fitted by means of rag bolts embedded in the wall. The required
holes in the wall shall be made and finished neatly with cement plaster and brought to the original
finish of the wall within the tendered rates. Gravity louver shutters of suitable size shall be fixed
on the outside wall covering the hole for the exhaust fan in order to restrict the inrush of rainwater
etc. A wire mesh shall be provided in place of gravity louver shutters to restrict the entry of birds
where there is no chance of inrush of rainwater. All the metal parts of the exhaust fans shall be
effectively earthed. The fans shall be assembled and mounted as per the manufacturer‟s
instructions. The wiring to the exhaust fan from the nearest point shall be carried out with 3 core
1.5 sqmm PVC insulated stranded copper conductor cords.
3.3.11 Installation of Earthling
The earthling installations shall generally conform to IS:3043/1966 and requirements of
Indian Electricity Rules, 1956.
All three-phase medium voltage equipment‟s shall be earthed by two separate and
distinct connections with earth through earth electrodes. Single phase equipments shall be
earthed at least at one point. In case of high & extra high voltages, the neutral point shall be
earthed by not less than two separate and distinct connetion with earth each having its own
electrode.
An earthing electrode shall not be situated within a distance of 1.5 metre from the building
whose installation system is being earthed. The cross sectional area of earth continuity conductor
in electrical installation shall no where be less than 16swg copper or 14swg GI wire. The earth
resistance for various installations shall be restricted within the following maximum permissible
limits.
109 NSP/CW
Non industrial Buildings : 5 ohms
Earth continuity inside an installation : 1 ohm(From electrode to any point in installation)
The following types of earthing installations shall in general be provided.
(a) Pipe earthing
3.3.12 Pipe Earthing
Pipe earth electrodes shall be of perforated class B G.I. pipe of specified length and
diameter. Galvanising of pipes shall conform to relevant ISS. The G.I. pipe electrode shall be cut
tapered at the bottom and provided with holes of 12mm dia drilled not less than 75mm from each
other in zigzag manner upto 500mm from the top of the electrode. A pair of 50mm x 5mm G.I. flat
clamp with 2 nos 18mm dia drilled holes on either side shall be welded to the electrode at about
150mm below the top of the pipe.
The electrode shall be buried in the ground vertically with its top not less than 200mm
below the ground level. The pipe earth electrode shall be surrounded by, either salt & charcoal in
alternate layers or a homogeneous mixture of the both, for a radius of about 150mm and upto a
height of about 250mm below the top of the electrode. The balance portion of the excavated pit
shall be filled with good quality soil and properly compacted.
A brick masonry chamber with hinged cast iron/ removable RCC inspection cover of size
300mm x 300mm shall be constructed within the tendered rate. Watering arrangement shall be
made with funnel and wire mesh fixed by means of a reducer socket on the top of the electrode.
3.3.13 Installation of Earthing Leads
The earthing lead connecting the earth electrode to the apparatus or installation directly
shall be of the same material as earth electrode. The earthing leads shall be either wires or strips
of adequate size as specified and of either G.I. or tinned copper. The G.I. leads shall be
connected to the electrode by means of 16mm dia G.I. nut bolts with flat & spring washer and the
tinned copper leads shall be connected to the electrode by means of 16mm dia brass nut bolts
with flat & spring washer.
All earth connections shall be visible for inspection. The earthing lead from electrode
onwards shall be suitably protected from mechanical injury by means of 20mm dia G.I. pipe for
G.I. wires. The portion of this protection pipe within ground shall be buried at least 300 mm deep
from ground level. (Subject to increase upto a depth of 600mm in road crossings and
pavements.) The portion within the building shall be recessed or clamped at not more than
500mm interval in the walls/ columns/ beams etc and recessed in the floors. Joints in the earthing
lead from earth electrode to apparatus shall be avoided as far as practicable. However if joints
110 NSP/CW
are inevitable, same shall be done by welding or proper bolting in case of G.I. strips and brazing
or proper bolting in case of tinned copper strips. The welded joints in G.I. strips shall be applied
with bituminous paint and wrapped with bituminous tape.
3.4.0 TESTING
Before a completed installation or an addition to an existing installation is put into service,
the following tests shall be carried out by the electrical contractor in presence of Engineer-in-
charge.
(i) Polarity test
(ii) Insulation resistance test
(iii) Earth continuity test
(iv) Earth electrode resistance test
3.4.1 Polarity Test
It shall be ensured by this test that the single pole switches have been fitted on the live
side of the circuit they control. In a two-wire installation, test shall be made to verify that all
switches in every circuit have been fitted to phase conductor or non-earthed conductor of the
circuit. In three or four-wire installation, test shall be performed to verify that every non-linked
single pole of switch is connected to one of the phase conductor of supply.
3.4.2 Insulation Resistance Test
The insulation resistance shall be measured by applying between earth and whole
system of conductors or any section thereof with all fuses in place and all switches closed and
except in earth concentric wiring, all lamps in position or both poles of installation otherwise
electrically connected together, a d.c. voltage of not less than twice the working voltage,
provided that it does not exceed 500 volts for medium voltage circuit. Where the supply is derived
from 3 wire a.c. or d.c. or polyphase a.c. system the neutral pole of which is connected to earth
direct or through added resistance, the working voltage shall be deemed to be that which is
maintained between the outer or phase conductor and neutral.
The insulation resistance of an installation measured as above shall not be less than 50
Mega-Ohms divided by the number of points of the circuit provided that the whole installation
shall be required to have insulation resistance greater than one Mega-ohm.
Control rheostats, heating and power appliances and electric signs may, if desired, be
disconnected from the circuit during the test, but in this case the insulation resistance between
111 NSP/CW
the case of frame and all live parts of each rheostat, appliances and signs shall not be less than
half a Mega-ohm.
The insulation resistance shall also be measured between all conductors connected to
one pole or phase conductor of the supply and all conductors connected to the neutral or the
other pole or phase conductor of supply. Such test shall be made after removing all metallic
connections between two poles of the installation. The insulation resistance between the
conductors of installation shall not be less than that specified above.
3.4.3 Earth Continuity Test
The earth continuity conductor including metal conduits and metallic envelope of cables
in all cases shall be tested for electric continuity and electrical resistance of the same along with
the earthing lead but excluding any added resistance of earth leakage circuit breaker measured
from the connection with the earth electrode to any point in the earth continuity conductor in the
completed installation shall not exceed 1 ohm.
3.4.4 Earth Electrode Resistance Test
The resistance of each earth electrode shall be tested with an earth tester and the
combined earth resistance of the earth grid of an installation shall be maintained as
mentioned below.
Distribution Substations : 2 ohms
Industrial Buildings : 4 ohms
Non industrial Buildings : 5 ohms
Earth continuity inside an
installation
: 1 ohm(From electrode to any point in
installation)
3.4.5 The completed installation shall be taken over only if the results obtained from the above
tests are within the limits mentioned above and in accordance with I.E. Rules. On
completion of testing of installation, a certificate shall be furnished by the contractor
countersigned by the certified supervisor having a valid electrical supervisory licence issued
by Electrical Licensing Board of the State Government under whose direct supervision the
installation was carried out. This certificate shall be in a prescribed form obtainable from
local supply authority.
3.5.0 SPECIAL CONDITIONS OF CONTRACT FOR ELECTRICAL INSTALLATION
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3.5.1 Authorities
The contractor while executing the work shall obey to the provisions of the Government
Acts relating to the work and the regulations and by-laws of statutory bodies or local authorities
and supply authorities. The contractor shall undertake to provide all test certificates and make
necessary arrangements to obtain electric supply.
3.5.2 Drawings
The installations work shall be carried out as per the approved execution drawings. Prior
to laying of conduits or cables, the contractor shall submit drawings for same indicating the route,
conduit size and numbers, location of inspection boxes etc. for approval.
The contractor on completion of the installation shall submit the following drawings in
tracing paper.
As built electrical layout drawings of each floor showing the position of points & outlets,
type of fittings & fixtures, location of switch boards & distribution boards, circuit & phase
indication, position of earth electrodes, cable & conduit routes, position of lightning terminals &
conductors etc neatly drawn.
As built schematic single line diagram of the entire installation showing
(i) all distribution boards having description of capacity, system & source of supply, type &
their numbers;
(ii) location, size, type, length of main and sub-main cables/ wires;
(iii) Load details of each circuit or ways of distribution board or switch gear.
The drawings shall furnish the identification details such as name of work, job no.,
accepted tender no., date of completion, site location, name & address of owner, name &
address of consultant, signature & name of contractor, his address, scale of drawing.
3.5.3 Commercial
All types of labourers referred in the schedule such as masons, electricians, wiremen,
cable jointers, helpers, labourers etc are required to carry out electrical installation work to a
building with all necessary tools and plants with them.
After completion of the installation, the contractor shall test the same in the presence of
Engineer-in-charge for safety and durability as per IS specification and I.E. Rules. He shall get
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the electrical installation inspected by the Electrical Inspecting Authority and obtain necessary
inspection report and statutory clearance to energise the installation at his own cost. However all
fees for inspection prescribed by the statutory authority paid by the contractor shall be
reimbursed by the owner on production of documentary evidence. The contractor shall submit
necessary test certificates as and when required.
After completion of testing, necessary statutory inspection by competent authority and
contract/ agreement with local supply authority, the contractor at his own cost shall arrange for
final commissioning and energisation of installations before final handing over to the owner.
Rate quoted shall include all cost of labours with tools and plants, sundries and
accessories, transportation of materials from local store, insurance, storage and handling,
providing watch and ward to the installation carried out by him and materials in his custody, and
expenses for maintaining the installation in proper order till final taking over. The contractor shall
make good the damages caused during the course of work at his own cost.
Only materials of approved make shall be used. All other materials not included in the list
of approved materials shall be got approved from Engineer-in-charge. If required, the materials
may be sent for testing to any standard testing laboratory for conforming the quality and
specification as per ISS. The cost towards testing shall be borne by the contractor. No surplus
material procured by the contractor shall be accepted by the owner.
The work shall be carried out in accordance with the specification of the schedule
complete with cost of all materials (except otherwise mentioned), all types of labour involved, all
types of tools & plants required, sundries and accessories and as per the drawing, design and
direction of Engineer-in-charge.
The electrical installation work shall be carried out by a registered and licensed electrical
contractor duly authorised by the local Electrical Licensing Authority. The work shall be directly
supervised by a Licensed Electrical Supervisor. Copy of valid license and details of previously
executed works of the contractor and his supervisor shall be furnished alongwith the tender.
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3.5.4 Terms of Payment
Payment, up to maximum 80% of the quoted rate on each item completed but awaiting
testing and commissioning, shall be made. Another 10% payment shall be made after successful
testing in presence of Engineer-in-charge & inspection by statutory authority. The balance 10%
payment shall be made after completion of work with final commissioning, energisation, handing
over to owner & submission of performance bank guarantee.
3.5.5 Performance Guarantee
The entire electrical installations carried out by the contractor shall be guaranteed for a
trouble free operation against any bad workmanship, bad quality of material used for a minimum
period of 12 months from the date of taking over by the owner or 18 months from the date of
commissioning, whichever is earlier. Any defects found during this period shall be rectified and all
faulty materials shall be replaced by the contractor free of cost.
The performance guarantee shall be executed in shape of a bank guarantee, in the
prescribed format of the owner, amounting to 5% of the total value of electrical works executed,
through any Nationalised Bank valid till completion of the guarantee period.
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Annexure I
BILL OF QUANTITIES
S.no Description Quantity Unit Unit Rate in Rs
Total
1
Single under reamed 300mm Dia pile
foundation upto a depth of 8m with R.C.C.
M20 using 12mm size black hard granite
(crusher broken)stone chips including cost
of boreholes and cost of M.S. rod/Tor steel
and labour sundries T&P etc complete and
as per direction of engineer -in- charge
88 No
2
Earth work in oridinary soil within 50m,
initial lead and 1.5m, initial lift including
rought dressing and breaking clods to
maximum 5cm to 7cm and laying in layers
not exceeding 0.3m in depth as per
direction of the Engineer-in-charge
206.69 cum
3
Supplying and filling plinth with sand well
watered and rammed in layers not
exceeding 23 cm in depth with all lead and
lift including cost,
conveyance,loading,unloading,royalities
and taxes of all materials cost of all labour
sundries T&P required for the work etc
complete in all respect as directed by the
engineer in charge (Measurement will be
taken on finished compacted section only.)
5871.59 cum
4
Providing and Laying plain cement
concrete 1: 3: 6 .( 1 cement : 3 sand : 6
stone Agregate 12mm nominal size ) As
levelling course in foundation and plinth
etc. complete all depth and height. using
12mm size crusher broken HG metal of
approved quality from approved quarry
including hoisting. Lowering and laying
concrete to the required level ramming,
watering & curing etc complete including
cost conveyance of all materials with all
taxes and royalties all labour with sundries
T&P including hire and running charges of
machineries required for the work etc
complete in all respect and as per the
107.12 cum
116 NSP/CW
direction of Engineer-in-charge.
5
Cement concrete M 15 grade with 40 mm
to 10 mm size hard crusher broken granite
chips including cost of material, labour
required for the work, watering, curing etc.
Complete as per direction of E-I-C.
117.35 cum
6
Providing, lifting, hoisting and laying
Reinforced Cement Concrete of M-20
grade in Column base, Column Footings,
Raft Foundation,Stem of the Columns,
beams, chaujja, fin, lintel, stair case, jali ,
shelves and slab etc as per approved
designs and drawings having a minimum
compressive strength ( in work test) 20N. /
Square mm. in 15 cm. cubes at 28 days
after mixing and test conducted in
accordance with I.S. 456 and I.S. 516 using
screened & washed sharp river sand for
mortar and 10 mm. to 20 mm. size black
hard crusher broken granite stone chips of
approved quality from approved quarry,
washed and cleaned to be mixed in
concrete mixture with approved quality of
cement including hoisting, lowering, laying
and compacting concrete by using
vibrators, watering and curing for 28 days
including, centering and shuttering then
after dismantling and removing the
debrises away from the work site and
finishing the exposed surface smooth
providing grooves or beads wherever
necessary including cost, conveyance,
loading, unloading, royalties and taxes of
all materials ,
6.1 Pile Cap 53.46 cum
6.2 Coloumn in Superstructure 12.62 cum
6.3 Tie Beam Plinth band 44.98 cum
117 NSP/CW
6.4 Lintel 4.4 cum
6.5 Chajja 20.79 sqm
7
Cutting,Straightening coiled or bent up M.S
plain HYSD/TMT reinforcement bars
welding or jointing if necessary
bending,binding,tying the grills as required
for R.C.C works,providing fan hooks where
necessary and hoisting, lowering and
placing in proper position according to
approved designs and drawings including
cost, conveyance,loading, unloading &
taxes of M.S plain/HYSD/TMT
reinforcement bars and binding wires of 18
to 20 gaugo required for the work and cost
of all labour, sundries, T&P and scaffolding
complete in all respect as directed by the
Engineer in charge (payment will be made
according to the actual weight of M.S
plain/HYSD/TMT reinforcement bars
consumed in the work only.
123.88 Qntl
8
Providing Fly Ash brick masonry work in
F & P with fly ash bricks 23cm x11 cm x8
cm tolerance of ± 2% size bricks having
crushing strength not less than 75 kg/cm2
with cement mortar 1 cement: 6 sands with
all necessary projection, splay cutting,
circular moulding, corbelling, etc., including
cost of all materials, labour, conveyance,
loading ,and unloadining, taxes, royalties,
scaffolding, watering, curing, sundries,
tools and plants, etc., as per the direction
of the Engineer-in-charge.
8.87 cum
9
Providing Fly Ash brick masonry work in
Super Structure with fly ash bricks 23cm
x11 cm x8 cm tolerance of ± 2% size
bricks having crushing strength not less
than 75 kg/cm2 with cement mortar 1
cement: 6 sands with all necessary
projection, splay cutting, circular moulding,
corbelling, etc., including cost of all
materials, labour, conveyance, loading
,and unloadining, taxes, royalties,
scaffolding, watering, curing, sundries,
tools and plants, etc., as per the direction
of the Engineer-in-charge.
84.49 Cum
118 NSP/CW
10
Rigid & smooth centering & shuttering for
R.C.C. and C.C. works including false
works, dismantling and removing them
from the site after casting, curing including
cost of materials etc., complete
598.68 sqm
11
6mm thick cement plaster (1:4) to RCC
surface including closed deep chiping and
all cost conveyance royalty & taxes etc.
comp. to work site per 1sqm.
275.72 sqm
12
Providing 12 mm. thick cement plaster in all
floors at all height with cement mortar of
mix (1:6) with cement and screened &
washed sharp sand for mortar and finished
smooth to the rough surface of the brick
masonry wall after racking out joints (along
with providing grooves wherever
necessary) including watering and curing
rounding of corner etc. complete with cost,
conveyance, loading, unloading, royalties
and taxes of all materials, cost all labour, I
& P, sundries and scaffolding required for
the work etc as directed by the Engineer in
charge.
524.93 sqm
13
16mm thick cement plaster (1:6) on brick
work in all floors at all height with cement
mortar of mix (1:6) with cement and
screened & washed sharp sand for mortar
and finished smooth to the rough surface of
the brick masonry wall after racking out
joints (along with providing grooves
wherever necessary) including watering
and curing rounding of corner etc. complete
with cost, conveyance, loading, unloading,
royalties and taxes of all materials, cost all
labour, I & P, sundries and scaffolding
required for the work etc as directed by the
Engineer in charge.
445.08 sqm
119 NSP/CW
14
Providing, lifting, hoisting and laying
Cement Concrete of M-20 grade having a
minimum compressive strength ( in work
test) 20N. / Square mm. in 15 cm. cubes at
28 days after mixing and test conducted in
accordance with I.S. 456 and I.S. 516 using
screened & washed sharp river sand for
mortar and 10 mm. to 20 mm. size black
hard crusher broken granite stone chips of
approved quality from approved quarry,
washed and cleaned to be mixed in
concrete mixture with approved quality of
cement including hoisting, lowering, laying
and compacting concrete by using
vibrators, watering and curing for 28 days
including, centering and shuttering
finishing the exposed surface smooth
providing grooves or beads wherever
necessary including cost, conveyance,
loading, unloading, royalties and taxes of
all materials ,
55.41 cum
15
2.5cm artificial stone flooring with cement
concrete (1:2:4) including punning using 12
mm size crusher broken granites chips
including cost of material with taxes ,
watering , curing etc.
738.76 sqm
16
Painting two coats with fungal resistance
weather seal coat of approved shade of
make Dulux / Asian / Berger (Apex Ultima
quality) over a coat of primer by means of
brush to out side surface of walls after
cleaning the surface including watering,
curing etc complete in all floors including
cost, conveyance, taxes of all materials,
labours, sundries, T&P required for the
work etc. complete in all respect as per
specification & direction of Engineer-in-
charge.
545.72 sqm
17
Providing and fixing dimond channeling to
the opening above the wall with 4mm wire
dimond upto height 0.6m complete as per
the direction of Engineer-in-charge.
23.76 Sqm
18
Supplying , fitting & fixing of M.S Iron
Collapsible gate made up with standard
M.S section duly fabricated with one coat
priming including cost of all materials and
labour.
2655.6 kg
19 2 coat of cement paint over a coat of cemet
wash 411.07 sqm
120 NSP/CW
20
Supplying, Manufacturing, fabricating &
assembling of frame structure at stage area
with circular/square hollow steel tube
section of TATA STRUCTURE shall
conform to CHS-IS-1161 & SHS?RHS of IS
4923 grade for shed component viz.
column, truss, purlin etc as per approved
drawing including two coat of primer & two
coat of enamel painting.
8337.44 kg
21
Supply, fitting, fixing of Pre painted
Galvanum roofing sheet of .50mm th
Az70/300mpa paint Rmp Ganga make or
similar with fixing screws .
427.45 sqm
22 Painting of truss , door , window with one
coat of redoxide and two coat of enamel
paint of approve make.
208.44 sqm
23
Supplying fitting and fixing R.C.C. (1:2:4)
fencing posts with chips 1.68M long 13cm
× 13cm at bottom and 8cm × 8 cm at top
and 30cm × 30cm × 8 cm base finished
smooth
110 No
24 Suplying of good quality barbed wire for
fencing including coat of material with
taxes
214.7 kg
25
Labour for fixing barbed wire fencing and
post by means of staples and straining
hooks by means of tying with G.I. wire and
including cost of staples, hooks and tying
wires
1789.20 Mt
Approach Road
26
Collecting , supplying , stacking IRC Grade
II metal (63mm to 40mm size) at site in
approved stack of 1.50m X 1.50m X 0.50 m
to be measured as 1cum including cost of
material with taxes
30 cum
27
Collecting , supplying , stacking IRC Grade
III metal (53mm to 22.40mm size) at site in
approved stack of 1.50m X 1.50m X 0.50 m
to be measured as 1cum including cost of
material with taxes
30 cum
28
Collecting , supplying good quality
moorum in approved stack of 1.50m X
1.50m X 0.50 m to be measured as 1cum
including cost of material with taxes.
117.24 cum
29 Collecting , supplying filling sand for
admixture with moorum including cost of
material with taxes.
68.16 cum
121 NSP/CW
30
Labour for admixing sand and moorum etc.
complete including cost of all labours and
hire charges of T & P materilas required for
work as per specification and direction of
Engineer in charge but exculding cost and
conveyance of sand and moorum
170.4 Cum
31
Labour for laying sub-base - dust ,moorum
in layers not exceeding 100 mm watering
and compaction to the required density in
O.M.C. with PRR but excluding cost and
conveyance of sub base materials.
170.4 Cum
32
Labour for spreading Metal and packing the
voids with small stones and hand packing
to proper camber including conveying ,
spreading of filler materials and filling
interstices by spreading the same over the
surface , watering consolidation with PRR
including hire and running charges of
P.R.R but excluding cost of materials etc.
Complete
60 Cum
33
Structural Designj, Soil Testing and display board-L.S
L.S
Total
Gross Total Cost: Rs. ..........................
We agree to execute the works in accordance with the approved drawings and technical
Specifications at ............ percentage above/below the estimated rates, i.e., for a total contract
price of Rs. ........... (amount in figures ) (Rs. ........... amount in words).
Signature of Contractor
122 NSP/CW
Annexure - 2
Format of certificate
Certified that the works upto -------------------------------------------------- level in respect
of construction of ------------------------------------- at ----------------------------------- have been
executed in accordance with the approved drawing and technical specifications.
Signature
Name & Designation
(Official address)
Place :
Date :
Office seal
123 NSP/CW
Annexure – 3
Bank’s Policy – Corrupt and Fraudulent Practices
(the text in this Annexure-3 shall not be modified)
Guidelines for Selection and Employment of Consultants under IBRD Loans and IDA Credits &
Grants by World Bank Borrowers, dated January 2011:
“Fraud and Corruption
1.23 It is the Bank’s policy to require that Borrowers (including beneficiaries of Bank loans),
consultants, and their agents (whether declared or not), sub-contractors, sub-consultants, service
providers, or suppliers, and any personnel thereof, observe the highest standard of ethics during the
selection and execution of Bank-financed contracts [footnote: In this context, any action taken by a
consultant or any of its personnel, or its agents, or its sub-consultants, sub-contractors, services
providers, suppliers, and/or their employees, to influence the selection process or contract execution
for undue advantage is improper.]. In pursuance of this policy, the Bank:
(a) defines, for the purposes of this provision, the terms set forth below as follows:
(i) “corrupt practice” is the offering, giving, receiving, or soliciting, directly or indirectly, of
anything of value to influence improperly the actions of another party2;
(ii) “fraudulent practice” is any act or omission, including misrepresentation, that knowingly or
recklessly misleads, or attempts to mislead, a party to obtain financial or other benefit or to
avoid an obligation3;
(iii) “collusive practices” is an arrangement between two or more parties designed to achieve an
improper purpose, including to influence improperly the actions of another party4;
(iv) “coercive practices” is impairing or harming, or threatening to impair or harm, directly or
indirectly, any party or the property of the party to influence improperly the actions of a
party5;
2 For the purpose of this sub-paragraph, “another party” refers to a public official acting in relation to the
selection process or contract execution. In this context “public official” includes World Bank staff and employees
of other organizations taking or reviewing selection decisions.
3 For the purpose of this sub-paragraph, “party” refers to a public official; the terms “benefit” and “obligation”
relate to the selection process or contract execution; and the “act or omission” is intended to influence the
selection process or contract execution.
4 For the purpose of this sub-paragraph, “parties” refers to participants in the procurement or selection process
(including public officials) attempting either themselves, or through another person or entity not participating in
the procurement or selection process, to simulate competition or to establish prices at artificial, non-competitive
levels, or are privy to each other’s bid prices or other conditions.
5 For the purpose of this sub-paragraph, “party” refers to a participant in the selection process or contract
execution.
124 NSP/CW
(v) “obstructive practice” is
(aa) deliberately destroying, falsifying, altering, or concealing of evidence material to the
investigation or making false statements to investigators in order to materially impede
a Bank investigation into allegations of a corrupt, fraudulent, coercive, or collusive
practice; and/or threatening, harassing, or intimidating any party to prevent it from
disclosing its knowledge of matters relevant to the investigation or from pursuing the
investigation, or
(bb) acts intended to materially impede the exercise of the Bank’s inspection and audit
rights;
(b) will reject a proposal for award if it determines that the consultant recommended for award or any
of its personnel, or its agents, or its sub-consultants, sub-contractors, services providers, suppliers,
and/or their employees, has, directly or indirectly, engaged in corrupt, fraudulent, collusive,
coercive, or obstructive practices in competing for the contract in question;
(c) will declare miss procurement and cancel the portion of the Loan allocated to a contract if it
determines at any time that representatives of the Borrower or of a recipient of any part of the
proceeds of the Loan were engaged in corrupt, fraudulent, collusive, coercive, or obstructive
practices during the selection process or the implementation of the contract in question, without
the Borrower having taken timely and appropriate action satisfactory to the Bank to address such
practices when they occur, including by failing to inform the Bank in a timely manner they knew
of the practices;
(d) will sanction a firm or an individual at any time, in accordance with prevailing Bank’s sanctions
procedures6, including by publicly declaring such firm or an ineligible, either indefinitely or for a
stated period of time: (i) to be awarded a Bank-financed contract, and (ii) to be a nominated7 sub-
consultant, supplier, or service provider of an otherwise eligible firm being awarded a Bank-
financed contract.
6 A firm or an individual may be declared ineligible to be awarded a Bank-financed contract upon (i) completion
of the Bank’s sanctions proceedings as per its sanctions procedures, including inter alia: cross-debarment as
agreed with other International Financial Institutions, including Multilateral Development Banks, and through the
application of the World Bank Group corporate administrative procurement sanctions procedures for fraud and
corruption; and (ii) as a result of temporary suspension or early temporary suspension in connection with an
ongoing sanctions proceedings. See footnote 12 and paragraph 8 of Appendix 1 of these Guidelines.
7 A nominated sub-consultant, supplier, or service provider is one which has been either (i) included by the
consultant in its proposal because it brings specific and critical experience and know-how that are accounted for
in the technical evaluation of the consultant’s proposal for the particular services; or (ii) appointed by the
Borrower.
125 NSP/CW
NR/ls Wednesday, April 30, 2008
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