std specificatioins - ce - 2011

CE11/IND.DOC(1) Sal(151210) DPD

STANDARD SPECIFICATIONS

FOR

CIVIL ENGINEERING WORKS

(2011 EDITION)


Published by Housing & Development Board, Republic of Singapore. No part of this document may be reproduced or copied in any form or by any means without the prior written permission of the publisher.


STANDARD SPECIFICATIONS FOR CIVIL ENGINEERING WORKS

CONTENTS SECTION 1 GENERAL SPECIFICATIONS 1-1 TECHNICAL SPECIFICATIONS SECTION 2 MATERIALS, WORKMANSHIP AND CONSTRUCTION IN GENERAL 2-1 SECTION 3 CONSTRUCTION AND WORKMANSHIP FOR ROADS AND DRAINS 3-1 SECTION 4 CONSTRUCTION AND WORKMANSHIP FOR SEWERS 4-1 SECTION 5 CONSTRUCTION AND WORKMANSHIP FOR EARTHWORKS 5-1 SECTION 6 LIST OF APPENDICES 6-1 The contents of this index on this page shall not be deemed to be part of the Specifications or be taken into consideration in the interpretation or construction thereof or of the Contract. HDB, being a ISO 14001 certified organisation, is committed to be the leader in environment management. The details of HDB's environmental policy can be found in the Corporate Philosophy at HDB Website http://www.hdb.gov.sg


SECTION 1 : GENERAL SPECIFICATIONS 1.1 GENERAL

1.1.1 Definitions, Abbreviations and Interpretations 1-1

1.1.2 Payment of Employer's Bills, Expenses, Etc 1-2

1.1.3 Compliance with Technical Guidelines For Fire Safety In Temporary 1-2 Buildings In Construction Worksites

1.1.4 Stamp Duties 1-2

1.1.5 Contract Payment by GIRO/EPS 1-3

1.1.6 Goods & Services Tax 1-3

1.1.7 Provisional Sums 1-3

1.1.8 Prime Cost Sums 1-3

1.1.9 Carriage By Sea 1-4

1.1.10 Bribery 1-4

1.1.11 Overclaim Leading to Overpayment 1-4

1.1.12 Work Methods 1-4

1.1.13 Office For Use By SO Rep 1-5

1.1.14 Precautionary Measures To Be Taken During A Disease Pandemic 1-5

1.1.15 Temporary Sanitary Facilities 1-5

1.1.16 Working Area, Position, Lines etc 1-6

1.1.17 TOL Fee for Land Outside Contract Boundary 1-7

1.1.18 Liaison with Town Council on Use of Common Property for Site Office 1-7 and/or Store

1.1.19 Assignment of Copyright of Photographs, Etc. 1-8

1.1.20 Clearance Of Site, Turf And Topsoil 1-8

1.1.21 Preservation of Existing Trees During Construction & Development 1-8

1.1.22 Research Work 1-9

1.1.23 Site Management 1-10

1.1.24 Setting Out 1-10

1.1.25 Signboards 1-10

1.1.26 Air Pollution Control 1-10

1.1.27 Provision Of Bins For Waste And Debris 1-10

1.1.28 Periodic Cleaning Up 1-11

1.1.29 Pest Control and Surveillance 1-11

1.1.30 Temporary Services 1-11

1.1.31 Care of the Works and Materials 1-11

1.1.32 Fencing and Lighting 1-11 The contents of this index on this page shall not be deemed to be part of the Specifications or be taken into consideration in the interpretation or construction thereof or of the Contract.


CONTENTS Clause No. Clause Page 1.1.33 Cables/Services Detection 1-12

1.1.34 Damage to Public/Private Property 1-12

1.1.35 Cleaning and Maintenance of Roads and Drains 1-13

1.1.36 Access Roads and Protective Crossings 1-13

1.1.37 Demolition and Making Good 1-13

1.1.38 Breaking Up Of Existing Work 1-14

1.1.39 Excavation Of Service Trenches And Storage of Cable Ducts 1-14

1.1.40 Reinstatement of Service Trenches 1-14

1.1.41 Dumping of Debris and Rubbish 1-15

1.1.42 Inspection of Works Prior to Certified Completion 1-15

1.1.43 Cleaning Upon Substantial Completion 1-16

1.1.44 Rectification of Defect During Defects Liability Period 1-16

1.1.45 Noise Nuisance 1-16

1.1.46 Recovery of Legal Costs For Court Proceedings 1-16

1.1.47 Machinery Boundary 1-16

1.1.48 Mobile Cranes 1-17

1.1.49 Work Site Computer Equipment 1-17

1.1.50 Workers' Quarters 1-21

1.1.51 Assessment of Extension of Time Due To Exceptionally Inclement Weather 1-23

1.1.52 Insurance Policies 1-23

1.1.53 Contract Documents On Site 1-25

1.1.54 Lightning Protection To Temporary Structures And Metal Structures 1-25

1.1.55 Environmental Public Health Measures 1-26

1.1.56 Trade Subcontractors 1-26

1.1.57 Work On MRT Reserve Area 1-27

1.1.58 Stationery For Resident Technical Officer 1-28

1.1.59 Earth Control Measures 1-29

1.1.60 Electronic Submission For Progress Payments Claims And Request

For Variation Works 1-31

1.1.61 Land Survey Services For CE Works 1-32

1.2 MATERIALS - GENERAL

1.2.1 Metric Components 1-34

1.2.2 Materials And Workmanship 1-34

1.2.3 Approval Of Samples and Trade Names 1-34

1.2.4 Samples 1-36

1.2.5 Precautions Against Materials Being Taken Out of Site 1-36

1.2.6 Approval For Use of Ready Mixed Concrete 1-36

The contents of this index on this page shall not be deemed to be part of the Specifications or be taken into consideration in the interpretation or construction thereof or of the Contract.


CONTENTS

1.3 LABOUR

1.3.1 Labour Laws 1-37

1.3.2 Keeping Records of Workmen 1-37

1.3.3 Employment of Illegal Immigrants 1-37

1.3.4 Employment of Civil Engineers 1-37 1.4 CONSTRUCTION EQUIPMENT

1.4.1 Maintenance Of Construction Equipment 1-40

1.4.2 Contractor's Construction Equipment 1-40

1.4.3 Movement of Construction Equipment 1-40

1.4.4 Age Limit for Mobile Crane 1-40 1.5 SAFETY

1.5.1 Site Safety Measures 1-41

1.5.2 Safety Infringement 1-49

1.5.3 Reporting Of Accidents 1-50

1.5.4 Approved Construction Equipment 1-51

1.5.5 Gas Cylinders and Related Equipment 1-51

1.5.6 Erection of Temporary Structures 1-51

1.5.7 Submission of Proposal and Certificate of Supervision 1-51

1.5.8 Excavation 1-52

1.5.9 Storage of Diesel, Oil and Chemical 1-52

1.5.10 Provision of Equipment, Apparatus, Devices, Etc 1-52

1.6 NUISANCE AND IRREGULARITIES

1.6.1 Nuisance And Irregularities 1-53 The contents of this index on this page shall not be deemed to be part of the Specifications or be taken into consideration in the interpretation or construction thereof or of the Contract.

CE11/S1.DOC(1) Sal(151210) DPD

GENERAL SPECIFICATIONS

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HOUSING & DEVELOPMENT BOARD

SECTION 1 : GENERAL SPECIFICATIONS 1.1 GENERAL 1.1.1 Definitions, Abbreviations And Interpretations In the Specifications, the following words and expressions shall have the meanings hereby assigned to

them except where the context otherwise requires : "SO Rep" shall mean Superintending Officer's Representative. "as approved" shall mean as approved by the Superintending Officer's Representative. "as directed" shall mean as directed by the Superintending Officer's Representative. "or other approved" shall mean as approved by the Superintending Officer's Representative and as

further defined in subclause 1.2.3 "Approval Of Samples And Trade Names". "as required" or shall mean as required or as shown or as indicated or as specified in "as shown" or the Drawings and/or Specifications. "as indicated" or "as specified" The following abbreviations are used in the Specifications : ASTM = American Society for Testing and Material BS = British Standard BCA = Building and Construction Authority BCD = Building Control Division cm = centimetre cm2 or cm2 = square centimetre cm3 or cm3 = cubic centimetre CP = Code of Practice DIN = Deutche Industrie - Normen ENV = Ministry of the Environment FSSD = Fire Safety and Shelter Department g = gram HDB = Housing & Development Board IDA = Info-communications Development Authority of Singapore ISO = International Organization for Standardization kg = Kilogram KN or kN = Kilonewton LTA = Land Transport Authority m = metre m2 or m2 = square metre m3 or m3 = cubic metre mm2 or mm2 = square millimetre mm3 or mm3 = cubic millimetre Max or max = maximum MOM = Ministry of Manpower MRT = Mass Rapid Transit N = newton No. or no. = number NEA = National Environment Agency NParks = National Parks Board Min or min = minimum PE = Professional Engineer registered under the Professional Engineers Board, Singapore

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1.1.1 Definitions, Abbreviations And Interpretations (Cont'd) PowerGrid or Grid = Powergrid Ltd PUB = Public Utilities Board PTL = Public Telecommunications Licensees RC or rc = Reinforced Concrete SPRING Singapore = Standards, Productivity & Innovation Board SAC = Singapore Accreditation Council SLA = Singapore Land Authority SINGLAS = Singapore Laboratory Accreditation Scheme SPSL = SP Services Ltd SS = Singapore Standard C = degree Celsius % = percent + = plus or minus = less than or equal = greater than or equal < = less than > = greater than v/v = measured by volume w/w = measured by weight m = micrometre Words importing the singular also include the plural and vice versa where the context requires. The clause headings in the Specifications shall not be deemed to be part thereof or be taken into

consideration in the interpretation or construction thereof or of the Contract. All clauses in the Specifications shall be deemed to be directed at the Contractor unless expressly

specified otherwise and the Contractor shall perform and/or comply with such instructions, directions, requirements and obligations specified in the Specifications and required under the Contract.

All Acts of Parliament, statutes, regulations, bye-laws, orders, local and foreign standards and codes of

practice specified shall be deemed to refer to the latest and shall be deemed to include any amendments, and/or modifications and/or additions and/or re-enactments thereto.

1.1.2 Payment Of Employer's Bills, Expenses, Etc The Contractor shall duly and punctually pay to the Employer the billed and any other expenses incurred

by the Employer in respect of the supply of materials, services, etc. The Contractor shall pay to the Employer interest at the rate of seven percent per annum or such other

rate as may be determined from time to time by the Employer in respect of any arrears of payment or other outstanding sums due and payable to the Employer, from the due dates until payment in full is received by the Employer.

The Employer reserves the right to set off such bills and expenses against monies due or becoming due to

the Contractor before payment of the balance, if any to the Contractor. In this respect, all Employer's bills and other expenses due from the Contractor shall have priority over debts due to third parties.

1.1.3 Compliance With The Technical Guidelines For Fire Safety In Temporary Buildings In Construction Worksites The Contractor shall comply with the Technical Guidelines for Fire Safety in Temporary Buildings in

Construction Worksites, including any amendment thereto, issued by the FSSD, Singapore Civil Defence Force. In this connection, the Contractor's PE shall endorse on the plans for all temporary buildings to certify compliance with the said FSSD Guidelines.

1.1.4 Stamp Duties The Contractor shall have all documents required by or arising out of or in connection with this Contract

properly stamped to comply with the Stamp Duties Act. The costs and expense arising out of this obligation, including all stamp duties required, shall be borne by the Contractor and shall be deemed to have been allowed for in the Contract Sum.

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1.1.5 Contract Payment By GIRO/EPS All payments under the Contract by the Employer to the Contractor shall be effected through the Inter-

bank GIRO System and/or other Electronic Payment Systems. The Contractor shall submit all the necessary forms, such as Inter-bank GIRO (IBG) form, etc., duly

completed and signed, to the Finance Department, HDB, HDB Hub, 480 Lorong 6 Toa Payoh, Singapore 310480; within fourteen days from the date of the Letter of Acceptance to effect payments through such Systems.

In the event the payment arrangement through such Systems terminates for whatever reasons, the

Contractor shall re-submit all the necessary forms to the Finance Department within 14 days from the date of the termination.

The preceding requirements shall not be applicable to payments by the Employer to the Contractor in

approved foreign currencies, where required under the Contract. 1.1.6 Goods & Services Tax The Contractor shall not include in the rates and prices quoted in the Contract Sum, the GST chargeable

for the supply of goods, services or works required in the Contract. All rates and prices quoted shall be exclusive of the GST.

The Employer shall reimburse the Contractor any GST charged on the goods, services or works supplied. The Contractor shall declare his GST status in his Tender. The Contractor shall clearly indicate whether

he is, or whether he will be a taxable person under the GST Act. The Contractor shall, if available, furnish the GST registration number to the Employer.

The Contractor will be deemed to be a taxable person if no declaration to the contrary is made in the Form

of Tender. The Contractor who declares himself to be a non-taxable person under the GST Act but who becomes a taxable person after he has been awarded the Contract shall forthwith inform the Employer of his change in GST status. The Contractor shall be entitled to reimbursement by the Employer of any GST charged on the goods, services or works he supplies after his change in GST status.

1.1.7 Provisional Sums Where Provisional Sum Items are included in the Contract, they shall be inclusive of all costs necessary in

carrying out or supplying the work, materials or goods. These Provisional Sum Items shall be inclusive of the Contractor's profit and overheads but shall be net of trade and cash discounts.

1.1.8 Prime Cost Sums Where Prime Costs Sums (P.C. Sums) are provided for any work, materials or goods, these sums shall be

inclusive of carriage but exclusive of the Contractor's profit and attendance. These P.C. Sums shall also be net of trade and cash discounts.

Allow and separately price for profit and attendance in respect of such P.C. Sums in the Form of Tender. P.C. Sums shall be deducted from the Contract Sum and in lieu thereof shall be added the sums due to

the Contractor for the said work, materials or goods. The sum allowed by the Contractor in the Contract for attendance in respect of any P.C. Sums shall be fixed regardless of whether the actual sum expended is greater or less than the P.C. Sums. In respect of profit, the amount to be paid shall be the percentage quoted against the actual sum expended in relation to the P.C. Sums.

Should the work, materials or goods for which a P.C. Sums is provided in the Contract be not required, or

if the Employer chooses to carry out or supply the aforesaid work, materials or goods by his own workmen or by other contractors, which the Employer is contractually entitled so to choose, then such P.C. Sums together with the profit and attendance allowed by the Contractor in the Contract shall be deducted in full from the Contract Sum.

Should the Contractor himself be engaged or instructed to carry out or supply any work, materials or

goods under a P.C. Sums, the profit and attendance allowed by the Contractor in the Contract in respect of the P.C. Sums shall be deducted in full from the Contract Sum. In such event, the amount to be paid for the work, materials or goods shall be inclusive of the Contractor's overheads and profit for the work, materials and goods.

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1.1.9 Carriage By Sea Ensure that the carriage by sea of all goods, materials, Plant and equipment imported for the purposes of

this Contract shall be on vessels owned and operated by shipping lines which are approved lines at the time the contract of carriage is entered into. Other ships may be used only if no approved line:

(a) can deliver the goods, material, Plant and equipment in time to meet the delivery dates specified in

the Contract; or (b) can provide the same measure of service at the same cost. The Bills of Lading for the goods, material, Plant or equipment used by an approved line(s) shall be

sufficient evidence of their carriage by an approved line(s) in compliance with this subclause. Where the carrier is not an approved line, the Contractor shall satisfy the SO Rep that the conditions

herein stated have been satisfied. The SO Rep may require and the Contractor shall forthwith furnish to the SO Rep a letter from at least one approved line at the time the contract of carriage with the carrier is entered into stating that in respect of the shipment in issue they are either unable to quote or to provide the service required.

Notwithstanding anything contained in this subclause, the Employer shall not be responsible for any act or

default of the carrier or for any loss or damage sustained by the Contractor on account of having to comply with this subclause.

The list of current approved lines can be obtained from the Procurement Office of the HDB's Contracts &

Administration Department, Basement 1, HDB Hub, 480 Lorong 6 Toa Payoh, Singapore 310480 1.1.10 Bribery During the currency of this Contract, the Contractor and his authorized agents or representatives shall not

offer or attempt to offer any bribes, commission or gift to the Employer's employees. Should it be discovered that bribes, commission or gift have been given to any of the Employer's employees, the employment of the Contractor under this Contract may be terminated. The decision of the Superintending Officer with regard to the interpretation and implementation of this subclause shall be final and binding on and conclusive against the Contractor.

1.1.11 Overclaim Leading To Overpayment If at any time during the Time for Completion and any time period where liquidated damages are imposed

under the Contract, the Contractor is found to have over-claimed and was paid for more than the value of the Permanent Works carried out and/or approved unfixed materials at the Site, the SO Rep shall be empowered to deduct from the Contractor's subsequent payments the sum overpaid together with the Employer's charges, and interest calculated at seven percent per annum

1.1.12 Work Methods Submit to the SO Rep for his approval the work methods of the trades as required by the SO Rep to

ensure good workmanship. A marking system, where applicable showing inter alia, the control, grid and level reference lines shall be included in the work methods.

The Contractor shall ensure that sub-contractors engaged comply with the work methods approved by the

SO Rep. Should it appear to the SO Rep at any time that the work methods proposed will not ensure good

workmanship in the Works, the SO Rep may require the Contractor to make at his own cost and expense such modifications to the original work methods as the SO Rep may consider necessary or appropriate.

Use or employ only workers who are skilled and capable of executing the Works in accordance with the

work methods approved. Approval by the SO Rep of the Contractor's work methods, revised work methods or any details and

information provided under this subclause shall not in any way affect, relieve or vary the Contractor's liabilities or obligations under the Contract.

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1.1.13 Office For Use By SO Rep A separate air-conditioned modular container site office, separate from the Contractor's site office, of at

least 18 square metres with two tables of at least 1.5 m length and four chairs, a steel cabinet, a fire extinguisher of minimum 5A Rating, a white board of minimum 600mm x 900mm size and soft boards covering the entire office walls shall be provided for the use of the SO Rep. The modular container site office shall be submitted for approval by the SO Rep. The design of the office shall comply with the Technical Guidelines For The Fire Safety In Temporary Buildings In Construction Sites, including any amendment thereto, issued by FSSD and the Building Control (Temporary Buildings) Regulations including any latest requirements by BCD, BCA.

The following shall also be included in the site office : (i) False ceiling with concealed lightings (min 8 no. 40w fluorescent lighting). (ii) Power points : min 1 no. 15 amp for air conditioner, 2 no. 13 amp socket and 2 no. light switches. (iii) Lighting protection complying with Singapore Standards CP33:1996 and/or any latest requirements

by the BCD, BCA. One telephone with call transfer facility shall be provided during the Time for Completion and any time

period where liquidated damages are imposed under the Contract. If the Contractor fails to provide the telephone, the SO Rep will make the arrangement and all costs and expenses shall be deducted from payment due or becoming due to the Contractor.

Install a First Aid Kit and other safety appliances as directed. The First Aid Kit shall be adequately

stocked with medicine for first aid at the site office. Provide "No Smoking" Stickers, ear plugs and a rubber stamp indicating particulars of the Contract for site

use. The Contractor shall allow for the maintenance of the site office and all the facilities, furniture and fittings

therein in a clean and good working condition to the satisfaction of SO Rep. The Contractor shall pay all charges for the provision and use of the telephone and electricity at the site offices during the Time for Completion and any time period where liquidated damages are imposed under the Contract. The Contractor shall be responsible for making arrangement and to obtain the approvals from the relevant authorities for the erection of site office and the related temporary facilities. Temporary Occupation Licence, fees, rental charges and all related costs in connection with the above shall be borne by the Contractor.

1.1.14 Precautionary Measures To Be Taken During A Disease Pandemic The contractor shall be required to implement necessary precautionary measures as advised by the

Ministry of Health or other relevant Authorities during a disease pandemic. Based on the recommendations from the government's advisory, the contractor shall follow up expeditiously to plan for such contingency and stock up necessary supplies or equipment (eg thermometers) so as to be able to implement the required measures in a short notice.

1.1.15 Temporary Sanitary Facilities Within 21 days from the date of the Letter of Acceptance, the Contractor shall provide temporary sanitary

facilities with adequate lighting on site in suitable structures to be approved by the SO Rep. The Contractor may use the Employer's Standard Drawings as a guide in designing the temporary sanitary facilities. The temporary sanitary facilities shall contain water closets and shower compartments in the proportion of 1 closet and 1 shower to every 25 workmen, for the duration of the Time for Completion and any time period where liquidated damages are imposed under the Contract. In addition, the Contractor shall provide separate sanitary facilities with water closet and shower compartment for use by the Employer's officers. Prior written approval by the SO Rep shall be obtained before erection of these facilities.

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1.1.15 Temporary Sanitary Facilities (Contd) The water closets shall be of a type, make and pattern approved by the PUB. Provide and lay glazed wall

tiles or other approved material to the internal walls of the temporary sanitary facilities up to a height of 1.8m from the floor. The doors to the cubicles of the temporary sanitary facilities shall be of approved material.

All waste discharge from the water closets and all waste water from the temporary sanitary facilities and

from the Site shall be discharged into a public sewer. Arrange with the PUB to carry out connection work from the temporary sanitary facilities to the public sewer and pay all charges and maintenance in connection therewith. The Contractor shall be responsible for all damage to and shall indemnify the Employer against all liabilities in respect of such sewer connections.

Where a public sewer is not available or where it is not possible to connect to a public sewer, provide and

install temporary septic tanks of a type, pattern and capacity approved by the PUB, to serve the water closets, showers and baths. Drawings of such septic tanks may be obtained from the PUB.

1.1.16 Working Area, Position, Lines Etc Where the Temporary Working Area is indicated in the Drawings, the Contractor will be allowed the

working space and he shall confine his operations and temporary facilities such as site offices and sheds as he may require for executing the Works, within the area indicated. The Contractor shall be required to take out a Temporary Occupation Licence (TOL) from the Singapore Land Authority or Lands Management Section, HDB, for occupying the land as his temporary working area. The Contractor shall pay all TOL fees, and bear all costs and expenses for the use and maintenance of and access to his temporary working area and comply with all the conditions imposed by the Singapore Land Authority or Lands Management Section, HDB. Where the Contractor opts not to use the Temporary Working Area, or use a smaller Temporary Working Area than that indicated in the Drawings, there shall be no cost adjustment to the Contract Sum.

Where no Temporary Working Area is indicated in the Drawings, the Contractor shall check on the

availability of land and apply to the Singapore Land Authority or Lands Management Section, HDB or other relevant authority, for the use of land as temporary working area required for his operations and setting up of temporary facilities such as site offices and sheds as he may require for executing the Works. The Contractor shall pay all charges, TOL fees and bear all costs and expenses for the use and maintenance of and access to the said land and comply with all the conditions imposed by the Singapore Land Authority or Lands Management Section, HDB, or other relevant authority.

The Temporary Working Area allocated shall only be used solely for the purpose of executing Works

under the Contract. The whole of the Temporary Working Area shall be vacated and the land made good on Substantial Completion.

In arriving at the Contract Sum the Contractor shall be deemed to have used as a basis the levels which

are shown on the various cross-sections and longitudinal sections of the Drawings relative to the existing ground levels in determining his quantities of excavation or filling for the completed Works.

The precise positions, lines, depths and directions of the Works are indicated within all practicable limit. If the Contractor wishes to make ground tests or other similar tests, then he shall state the extent and

manner of carrying out these tests and obtain the approval of the SO Rep before he proceeds. Where trial borings or tests have been made by the Employer, the results may be made available to the

Contractor. The results or any other information on strata is given in good faith but the Employer accepts no responsibility for the accuracy or reliability of such information. In all cases the Contractor shall be deemed to have satisfied himself as to the type of strata and ground conditions that he may encounter during the Works.

Should the Contractor not agree with any level of existing land or other property as given in the Drawings,

he shall submit his objection in writing within 2 weeks from the date of the Letter of Acceptance. Otherwise, the Drawings shall be taken as correct for the purposes of setting out and determination of variations (if any).

Note that all existing ground levels are given as spot levels or contours on plan and that straight lines on

the sections represent the average ground levels. Any small differences of levels therefore shall not be regarded as sufficient reason for the Contractor to disagree with the information as shown on the Drawings.

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1.1.17 TOL Fee For Land Outside Contract Boundary Where the Contractor requires land outside the contract boundary for the setting up of Construction

Equipment and other temporary facilities for the Works, the Contractor shall check on the availability of such land and apply to the relevant Authority or Lands Management Section of HDB for the use of such land. In the event the relevant Authority or HDB's Lands Management Section allows the Contractor the use of such land, the Contractor shall at his own cost and expense comply with all the terms and conditions, pay all TOL (Temporary Occupation Licence) fees, bear all costs and expenses for the use and maintenance of and access to the said land imposed by the relevant Authority or HDB's Lands Management Section.

Such land allocated shall solely be used for the purpose of executing Works under the Contract. Any payment for unused materials or goods stored at such land shall be subject to the provisions in

Option Module B "Unused Materials or Goods not Delivered to Site" of the Conditions. 1.1.18 Liaison With Town Council On Use Of Common Property For Site Office and/or Store Consult with the SO Rep on the location of the site office and submit an application through the SO Rep to

the Town Council to obtain permission before putting up the site office and/or store. The application shall include the following :

(a) Contractor's covering letter. (b) Site plan of proposed location of site office and/or store. (c) Layout plan with site indication of the site office and/or store. (d) Letter of undertaking with the following conditions : (i) To put up and maintain the site office signboard. (ii) To open a PUB account for the use of water and electricity at the site office, if it is required

by the Town Council. (iii) To maintain the cleanliness and orderliness of the site office and/or store and its

surrounding areas during the Time for Completion and any time period where liquidated damages are imposed under the Contract.

(iv) To reinstate any damage caused during the Time for Completion and any time period where

liquidated damages are imposed under the Contract. (v) To remove the site office and/or store and reinstate the site to its original condition within 3

weeks from the Date of Substantial Completion. and any other conditions that the Town Council may impose. If the location is not approved by the Town Council, amend and resubmit the application through the

SO Rep. Ensure that those areas occupied by and surrounding the site office and/or store are maintained for the

duration of the Time for Completion and any time period where liquidated damages are imposed under the Contract. Upon Substantial Completion, remove the site office and/or store and reinstate the site to original condition within 3 weeks from the Date of Substantial Completion.

After the SO Rep has inspected the site and assessed that the area where the site office and/or store

were erected has been reinstated to original condition, arrange for the Town Council to take over. All cost, expenses and sums incurred by the Contractor howsoever arising or consequent upon shall be

deemed to be included in the Contract Sum.

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1.1.19 Assignment Of Copyright Of Photographs, Etc The Contractor shall assign to the Employer, the copyright of the photographs (including the

prints/slides/transparencies/ negatives) taken and all documents prepared under this Contract. The Employer shall have unfettered rights to use or reproduce all the photographs (including the

prints/slides/transparencies/negatives) taken and all documents prepared by the Contractor under this Contract for any purpose other than for the purpose for which the Contract was entered into.

In the event that the Contractor engages third parties to take the photographs (including the

prints/slides/transparencies/negatives) or prepare the documents, the Contractor shall procure the assignment of the copyright from such third parties to himself and thereafter, assign the copyright to the Employer.

The Contractor and/or any third parties are strictly prohibited from using or reproducing any of the

photographs (including the prints/slides/transparencies/negatives) taken and all documents prepared under this Contract in any other publication or for any other purpose whatsoever.

1.1.20 Clearance Of Site, Turf And Topsoil Clear the Site at such time and to the extent required by the SO Rep and take down hedges, trees, hack

up belukar, roots and any other obstruction from Site. All such waste materials removed shall be disposed off as directed. Should the quantity of work involved appear greater than that shown on the Drawings the Contractor shall make due allowance in the Contract Sum to cover such work and no adjustment to the Contract Sum shall be made.

When digging and cutting of turfed ground are carried out, the turf and topsoil shall first be removed and

stored nearby for re-use as directed. Turf and topsoil shall not be taken away from Site without prior permission of the SO Rep and they shall remain the property of the Employer.

1.1.21 Preservation Of Existing Trees During Construction & Development Where any existing tree(s) on the Site is stipulated to be preserved (hereinafter referred to as "preserved

trees" for the purpose of this subclause), the Contractor shall take all necessary precautions to avoid damage or injury to such trees and its roots and comply with the following requirements :

(A) Treatment Of Preserved Trees In Area Of Fill (i) Tolerable Depth Of Fill The area around preserved trees shall not be filled more than 300 mm in depth. (ii) Construction Of Well Around Trees Well not exceeding 1m in depth shall be constructed around preserved trees. The minimum

diameter of well shall be 6 times the diameter of preserved trees measured at the trunk 0.5m above ground level. Details of well shall be as shown in the Drawings.

(B) Treatment Of Preserved Trees In Area of Cut (i) Tolerable Depth Of Cut The area around preserved trees shall not be cut to a depth exceeding 300 mm. (ii) Retention Of Raised Planter Around Tree An area around preserved trees shall be retained as raised planter to conserve the root

system. The minimum diameter of raised planter shall be 6 times the diameter of preserved trees measured at the trunk 0.5m above ground level. Details of retention of raised planter are as shown in the Drawings.

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1.1.21 Preservation Of Existing Trees During Construction & Development (Cont'd) (C) Protection Of Existing Trees From Physical Damage By Equipment Etc During Construction (i) All preserved trees shall be protected against damage during construction operation by

suitable fencing or armouring. The protection of preserved trees shall be placed before commencing any excavation or grading operation/work and shall be maintained in repair for the duration of the Time for Completion and any time period where liquidated damages are imposed under the Contract, unless otherwise directed. The extent of fencing shall be determined by the SO Rep. Fencing shall be erected all round not less than 1.2m from the trunk of preserved trees.

Individual preserved trees near heavy construction traffic shall be wrapped with gunny sacks

and 50 mm x 100 mm planks worn vertically as armour around the trunk and spaced at no more than 50 mm apart to a height of 1.5m above ground.

(ii) Any damage to preserved trees root system shall be repaired immediately by the Contractor

under the supervision of a qualified horticulturist. Roots that are exposed and/or damaged during grading operations shall be cut off immediately and the inside of the exposed and/or damaged area cleaned; cut surfaces shall be treated with approved sealing compound and topsoil spread over the exposed root area.

(iii) Any damage to preserved trees branches shall be treated in accordance with the Drawings. (iv) If any preserved trees are severely injured by mechanical equipment, etc., the SO Rep shall

impose charges against the Contractor in accordance with Clause 1.6 "Nuisance and Irregularities".

(D) Health & Condition Of Preserved Trees (i) The Contractor shall ensure that : (a) Compaction of soil around preserved trees shall be avoided. (b) No material shall be stored within the root system. (c) There shall be no spillage of any nature within the spread of the preserved trees. (d) There shall be no parking of vehicles underneath the preserved trees. (e) There shall be no dumping of excavated materials, concrete, equipment etc. within the spread of the preserved trees crown. (f) Soil around preserved trees is properly cultivated to ensure that adequate supply of air and water get to the roots. (g) The site is drained in periods of heavy rainfall and irrigated during periods of drought. (ii) The Contractor shall also carry out any other routine maintenance of the preserved trees eg.

branch trimming, pesticide spraying etc. as instructed by the SO Rep. (iii) If the growth of the preserved trees is stifled, the Contractor shall inter-alia bear the cost of

making good. Charges in accordance with Clause 1.6 "Nuisance and Irregularities" shall also be imposed against the Contractor.

1.1.22 Research Work The Contractor shall provide and render all necessary assistance to the SO Rep or other authorised

persons conducting research work or procuring publicity materials on any aspects of the construction work in progress. When directed by the SO Rep, the Contractor shall also provide all brochures, quotations, sub-contract agreements, invoices, etc from his sub-contractors, suppliers and specialists for goods and services provided for the Works, all at the Contractor's cost and expense.

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1.1.23 Site Management Within 14 days from the date of the Letter of Acceptance, submit to the SO Rep for his approval the

following details on site planning : (a) Site organisation structure (b) Names and roles of Contractor's staff (c) Manpower schedule for each trade (d) Materials purchase and delivery schedule for each trade (e) Schedule of heavy equipment (f) Schedule of Construction Furnish the SO Rep with such further details and information as the SO Rep may require in regard to the

above items. At least 14 days before the supply of the materials by manufacturers/suppliers, the Contractor shall submit

the names of the manufacturers and suppliers to the SO Rep. At least 14 days before the commencement of the Works by the subcontractors, the Contractors shall

submit the names and roles of his subcontractors to the SO Rep. Should it appear to the SO Rep at any time that the proposed site planning is not able to ensure a smooth

progress of and good workmanship in the Works, the SO Rep is empowered to require the Contractor to make at the Contractor's own cost and expense all necessary modifications to the plans.

Approval by the SO Rep of the Contractor's site planning details, revised site planning and further

information provided under this subclause shall not in any way affect, relieve or vary the Contractor's liabilities or obligations under the Contract.

1.1.24 Reserved 1.1.25 Signboards Where erection of signboards with more than one language is required, all translations shall be carried out

by competent translators approved by the SO Rep. All completed signboards shall be approved by the SO Rep before they are erected.

1.1.26 Air Pollution Control Comply with the relevant provisions of the Clean Air (Amendment) Act and/or requirements of other

relevant Authorities. Take all necessary measures to abate the discharge of smoke, fumes or obnoxious gases or excessive

noise from Construction Equipment on the Site. When notified by the SO Rep that a particular Construction Equipment or equipment is discharging excessive smoke, fumes or obnoxious gases, stop the use of that Construction Equipment, and replace the same with acceptable Construction Equipment. No claims from the Contractor shall be entertained on account of the foregoing requirements. In addition, the SO Rep shall exercise his rights under Clause 1.6 "Nuisance and Irregularities" to impose charges against the Contractor.

1.1.27 Provision Of Bins For Waste And Debris The Contractor shall provide proper bulk bins of adequate size for storage of construction waste and

debris in compliance with the requirements of ENV.

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1.1.28 Periodic Cleaning Up All rubbish and debris shall be cleared from the Site from time to time as they accumulate or as directed

by the SO Rep. Particular attention shall be directed to those areas where other trades or statutory boards' contractors will be working in.

1.1.29 Pest Control And Surveillance Engage a Pest Control Operator who is registered with the BCA under the Work Head for Pest Control

and NEA under the Control of Vector and Pesticide Act to provide comprehensive pest control and surveillance work on the Site. Submit the name of the Pest Control Operator and proof of BCA/NEA registration to the SO Rep for approval prior to carrying out the work. The SO Rep may disapprove the Pest Control Operator selected by the Contractor and the Contractor shall not be entitled to any claims arising from such decision.

Pest control measures and surveillance programme shall fully comply with the requirements of the NEA as

well as the following : (a) Submit a detailed pest control and surveillance programme inclusive of Source Reduction

Regime/Strategy, Water bearing receptacle removal team at the Site to the respective NEAs regional office and the SO Rep prior to commencement of the Works. The frequency of fogging shall be in accordance with the requirements of the NEA. Fogging is to be carried out only by licensed Pest Operator using approved chemical.

(b) Maintain a site register containing an up-to-date record of pest control and surveillance work that

has been carried out. The site register shall be made available and ready for inspection by the SO Rep when required.

(c) Submit monthly summarised returns of the site records required by NEA to the respective NEA

regional office. The work required under this subclause shall include all necessary measures to prevent the Site from

becoming conducive to the breeding or harbouring of vectors. Carry out site checks at least once a week to detect and remove breeding and harbouring grounds. If breeding or harbouring of vectors is found at the Site, enforcement action may be taken against the Contractor by the NEA. The SO Rep may also exercise his rights under Clause 1.6 "Nuisance and Irregularities" to impose charges against the Contractor.

1.1.30 Temporary Services The Contractor shall provide and maintain all temporary services necessary for the execution of the

Works. Give all notices and pay all dues in connection therewith. All water required for use on the Works shall be provided by the Contractor.

1.1.31 Care Of The Works And Materials The Contractor shall be responsible for the care of the Works and safe keep all materials delivered to the

Site by the specialists, suppliers or sub-contractors against all risks arising from weather, negligence, damage or loss until Substantial Completion is certified by the SO Rep. Allow for all necessary watching and security lighting.

1.1.32 Fencing And Lighting Where necessary, the Contractor shall provide and fix adequate temporary fencing for fencing off the

Works during construction on any part or parts of the sewers, drains, excavations, etc under the Contract and remove the fencing on Substantial Completion.

Provide temporary cross bridges with proper handrails and lights over the trenches at such points and at

such distances apart as in the opinion of the SO Rep may be necessary to give proper foot and vehicle access.

Fencing and cross bridges shall be provided on such lengths of the sewers, drains, excavations, etc

where children and others must be prevented from falling into the trenches, drains and excavations.

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1.1.33 Cables/Services Detection Visit and examine the Site carefully and ascertain its nature and make provision in the Contract Sum for

the type of ground conditions, constraints and underground services. Provide cables/services detecting devices to locate all existing cables/services prior to the

commencement of excavation or any other work such as driving of piles, piling of earth electrode and lightning conductors or poles and columns which are liable to damage existing buried services. Engage PUB licensed cables/services detection workers to carry out all cables/services detection work. The proposed line of excavation or area of other work shall be checked for existing services in a systematic manner by making sufficient passes in a grid formation to cover the entire area of work. The Contractor's attention is drawn to the requirements of the PowerGrid and IDA. The Contractor shall comply fully with the relevant provisions of the Public Utilities Act and Telecommunication Act or any amendment or re-enactment thereof.

The Contractor shall comply fully with the Licensing Scheme for telecommunication cable detection

workers by the IDA. Under the licensing scheme, the Contractor is required to engage qualified licensed telecommunication cable detection workers to locate all existing telecommunication cables/services before the commencement of excavation and earthworks (piling, dredging, boring, levelling, tunnelling, jacking, driving of any earth rod/casing/tube into the ground, etc) as defined under the Telecommunications Act 1999. The Contractor shall comply fully with the relevant provisions of the Telecommunications Act 1999 or any amendment or re-enactment thereof.

The extent of the checking carried out shall be properly documented and countersigned by the SO Rep.

Notwithstanding the precautions taken, the Contractor shall be liable for all costs and charges incurred if he damages any cables/services. The Contractor shall pay all charges, fees and bear all costs and expenses incurred in complying with the relevant provisions of the Telecommunications Act 1999 and Public Utilities Act or any amendment or re-enactment thereof.

The Contractor shall seek assistance from the relevant Government Department or Statutory Boards if he

has any query on the location of existing cables/services belonging to the Government Department or Statutory Boards. In the case of PowerGrid cables/services, the Contractor may seek assistance from the Cable Damage Prevention Unit, PowerGrid. For telecommunication cables/services, the Contractor may seek assistance from the telecommunication system licensees, PTL, SingTel, SCV and StarHub.

Notify the SO Rep where mains, pipe or conduit are encountered with during excavation and where any

excavation is carried out adjacent to or under any existing cable, pipe, structure; or any other such work that may be affected by subsidence as the SO Rep may direct, regardless of whether such work is shown in the Drawings or not. If it becomes essential, in the opinion of the SO Rep to permanently support the Works, build supports of grade 15 concrete or take such steps as the SO Rep may direct. Under such cases, the Contractor shall be paid for this additional work unless in the opinion of the SO Rep, such additional work has been necessitated by the Contractor's negligence, lack of foresight or faulty workmanship.

In the event that damages have been caused to the public services due to the Contractor's work or

otherwise, all expenditure for such necessary repairs etc incurred by the relevant public Authorities shall be borne by the Contractor regardless of whether such repairs are due to accident or otherwise. The cost and expense for such repairs shall be deducted from monies due or becoming due to the Contractor or by direct payment by the Contractor to the Authorities.

If, in the opinion of the SO Rep, it is essential to permanently divert any cable, pipe or other services, such

diversions shall be paid for by the Employer. Provided always that such diversions do not form part of the Works.

1.1.34 Damage To Public/Private Property In the event that damage is caused to public/private services or property such as cables, pipes, fittings

and fixtures etc. by the Contractor whether by accident or otherwise leading to black-outs or other nuisance or inconvenience to the public or is likely to bring the Employer into disrepute, all costs and expenses incurred for necessary reinstatement or repairs shall be recoverable by the Employer by deduction from monies due or becoming due to the Contractor or as a debt due by the Contractor to the Employer. In addition, the SO Rep shall exercise his rights under Clause 1.6 "Nuisance and Irregularities" to impose charges against the Contractor.

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1.1.35 Cleaning And Maintenance Of Roads And Drains The Contractor shall maintain the cleanliness of public roads and drains used by his vehicles throughout

the Time for Completion and any time period where liquidated damages are imposed under the Contract. Construct washing bay for the cleaning of earth-laden lorries before they leave the Work Site. Clean up all deposits left by the vehicles on the road and employ sufficient workers for this operation every day. Earth droppings shall not be allowed to remain overnight either on the carriageways, pavements or in the drains. Where it is not feasible to remove deposits during normal working hours, carry out the cleaning operation during the hours between midnight and 6.00 a.m.

The Contractor shall be responsible for paying any fines imposed by the relevant authorities eg. Public

Health Department, Traffic Police etc. Ensure that the flow of traffic on the roads and access is maintained at all times during the Time for

Completion and any time period where liquidated damages are imposed under the Contract. Provide such flagmen, approved signs and signalling equipment as may be necessary day and night to control the traffic to the satisfaction of the SO Rep and the appropriate Controlling Authority. In the planning and execution of any Temporary or Permanent Works which may affect the traffic flow and/or access to the Site or other properties, co-operate closely with the SO Rep and the appropriate Controlling Authority.

Whenever required, remove with due compliance, Construction Equipment, machinery, staging and other

materials which may interfere with traffic and the use of roads, footpaths or open spaces on the Site or adjacent thereto.

Take every practical precaution to avoid interference with the flow of storm water through the drain, canal,

culverts and other side drains etc. Any spoil, rubble, timber, rubbish or other materials which may fall into or brought into the drain, canal, culvert and other side drains etc by the storm water shall be removed forthwith.

All necessary water tight flumes, cofferdams, chutes and/or other approved methods of controlling the flow

of water shall be adequate for this purpose and subject to the approval of the SO Rep. Such works shall be constructed in a rigid, workmanlike manner, sufficient to withstand water pressure at its highest level.

If the SO Rep considers that any temporary structure erected is obstructing the flow to an extent more

than necessary, making it liable to cause flooding in the event of a rain storm, he may, one hour after notifying the Contractor or the Contractor's Representative, employ other labour and Construction Equipment to demolish such structures. All costs and expenses incurred shall be deducted from any monies, due or becoming due to the Contractor.

The Contractor shall be liable for and indemnify the Employer against any actions, claims, costs and

demands for damages caused by the Contractor's non-compliance of maintenance of roads and drains, flooding, slips, subsidences or other failures resulting from non-compliance by the Contractor with respect to the above. In addition, the SO Rep shall exercise his rights under Clause 1.6 "Nuisance and Irregularities" to impose charges against the Contractor.

1.1.36 Access Roads And Protective Crossings The Contractor shall repair and maintain all access roads serving the Site and provide temporary

protective crossings over existing drains, channels, footways, etc throughout the Time for Completion and any time period where liquidated damages are imposed under the Contract. Making good all damage and/or clearing away on Substantial Completion to the satisfaction of the relevant Authorities and SO Rep.

1.1.37 Demolition And Making Good The Contractor shall take care when demolishing or cutting away existing work such that no adjacent work

is unnecessarily damaged in any way. Make good any work so damaged. Old materials may not be re-used in the new work, except where so specified or as directed. Exposed raw faces of existing concrete or brickwork which will not have new work built on them shall be

made good with cement, rendering or new brickwork and finished to a neat, straight, vertical or plane surface in harmony with the adjoining surface.

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1.1.38 Breaking Up Of Existing Work If it is found necessary to break up existing pavement, road or footpath, etc for constructional purposes as

required under the Contract, such intention of doing so shall be conveyed to the SO Rep prior to commencement of work. If construction work is to be carried out on public roads, first obtain permission from LTA. In the event that normal flow of traffic is interrupted due to the Works in progress, minimise the inconvenience caused to the public by constantly cleaning the roadway such that a steady flow of traffic is maintained. Temporary traffic directional signboards shall be installed at strategic points if required.

All existing work broken up by the Contractor shall be made good to the satisfaction of the SO Rep. The reinstatement shall comply with all the requirements of LTA. Works which do not conform to the

standard and requirements of the SO Rep or LTA shall be immediately removed and replaced or extended.

On completion of the reinstatement, maintain all the road surfaces etc., affected during the Time for

Completion and any time period where liquidated damages are imposed under the Contract. All faults, settlements etc., developed within this period shall be made good immediately upon receipt of an instruction from the SO Rep.

Be liable for all claims for injury or damage arising from any Defect in the reinstated road surface during

the Time for Completion and any time period where liquidated damages are imposed under the Contract and the Defects Liability Period.

Adhere strictly to the requirement set out in the LTA specifications on Road Opening and Reinstatement

of Trenches and the HDB Standard Conditions governing Trench Opening within HDB Estates when carrying out the Works required under this subclause.

1.1.39 Excavation Of Service Trenches And Storage Of Cable Ducts Excavate trenches for the laying of services within the contract Site. Such excavations and provision of

cable ducts crossing the road shall be paid for according to the Rates if they are not indicated in the Drawings.

If cable ducts are to be provided by the Service Department concerned, provide storage space on the Site

and shall be responsible for their loss or damage. 1.1.40 Reinstatement Of Service Trenches All service trenches for the laying of cables, pipes, etc within the Contract boundary shall be reinstated

immediately after the services have been laid and completed by the Services Authorities. All backfilling materials for cross or longitudinal trench within completed or partly completed road

carriageway or carpark shall be of approved materials conforming to the following characteristics : (a) The percentage passing 75 m B.S. sieve shall be not more than 35%; (b) The fraction passing through 75 m sieve shall have liquid limit not exceeding 35 and plasticity

index not exceeding 12; (c) Dry density shall not be less than 1760 kg per m3. Dry excavated soil may be used for backfilling only in open field outside road carriageway and carparks.

Backfilled materials shall be mechanically compacted in layers of 200mm and conform with the following requirements :

(a) Within 500mm of formation level - 95% of max dry density using Test No. 13 BS 1377:1975; (b) More than 500mm below formation level - 85% of max dry density using Test No. 12

BS 1377:1975; Damages, directly or indirectly caused by the trench to carriageway, kerb, footpath, drain, sidetable, etc

regardless of its existing condition shall be reinstated to conform to the current standard and practice of HDB.

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1.1.40 Reinstatement Of Service Trenches (Contd) Edges of all reinstated road pavement shall be cut straight with a power-saw. The saw-cut shall be of a

minimum depth of 75mm and edge of cut shall be at least 150mm from the edge of the trench depending on the extent of damages to the road surface.

Unless otherwise stated, the reinstated road pavements shall consist of the following : (a) 150mm asphalt premix (b) 350mm compacted crusher run road base binded with granite fines (c) The layer below the road base to the bottom of trench shall be made up of compacted granite

fines/cement dust. The level of reinstated road shall be allowed a tolerance of + 5mm from the existing road surface level

when measured with a 3m straight edge. Reinstatement of footpath shall cover the full width of the footpath. For turfed area, the reinstatement shall conform to the relevant clauses and subclause on turfing in the

Specifications. The Contractor shall be paid for work done under this subclause priced in accordance with the Contract

and the Rates. All backfilling materials not conforming to or not compacted according to this Specifications shall be

removed and replaced with approved materials and recompacted to the stipulated standard. 1.1.41 Dumping Of Debris And Rubbish Dispose of all unwanted debris, rubble or excess earth at approved dumping grounds and bear the cost of

all charges levied for the use of the dumping grounds. If the Contractor dumps debris, rubble or excess earth on land owned by the Employer or the Government

without written permission, he shall have to remove all debris, rubble or excess earth from such land at his own cost and expense. In addition, the SO Rep shall exercise his rights under Clause 1.6 "Nuisance and Irregularities" to impose charges against the Contractor.

1.1.42 Inspection Of Works Prior To Certified Completion Conduct detailed checks on the Works and rectify all Defect before arranging for the SO Rep to inspect

the Works for the purpose of certifying Substantial Completion. Ensure that all items to be incorporated into the Works have been so incorporated before such inspection by the SO Rep. The SO Rep may not inspect the Works if any of the abovesaid items are not incorporated into the Works. The Contractor shall not be entitled to any claims and to any extension of time on account of such failure to ensure that all items are incorporated into the Works.

After the first inspection by the SO Rep, the SO Rep shall give the Contractor a list of outstanding Defect

and the Contractor shall rectify all Defect on the list within seven days. If any of the Defect in the list is not rectified on the second inspection by the SO Rep, the SO Rep may

exercise his rights under Clause 1.6 "Nuisance and Irregularities" to impose a charge against the Contractor. The Contractor shall be given another seven days to rectify these Defect. Should any of these Defect be found not rectified on the third inspection, the Employer may employ and pay another contractor to rectify the Defect and all costs and expenses incurred by the Employer shall be recovered from the Contractor. In addition, the SO Rep may exercise his rights under Clause 1.6 "Nuisance and Irregularities" to impose a further charge against the Contractor.

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1.1.43 Cleaning Upon Substantial Completion On Substantial Completion, the Contractor shall remove all rubbish, Construction Equipment and surplus

materials, wash and scrub clean all floors, pavings, drains and all parts of the Works and leave the Works in a clean and hygienic condition. The Site and periphery shall be cleared of all rubbish left from the Contractor's work.

1.1.44 Rectification Of Defect During Defects Liability Period The Contractor shall within fourteen working days from the date of the written notification by the SO Rep

repair, rectify and make good to the satisfaction of the SO Rep all Defect, imperfections, shrinkages and other faults arising from or out of the use of materials or workmanship not in accordance with the Contract or from neglect or failure by the Contractor to comply with any obligation on his part under the Contract, which may become manifest.

If the Contractor fails to carry out his obligation as aforesaid, the SO Rep shall exercise his rights under

Clause 1.6 "Nuisance and Irregularities" to impose a charge on the Contractor. Without prejudice to the foregoing provisions, the Employer shall have the right to engage other person(s)

or contractor(s) to repair, rectify and make good all such Defect, imperfections, shrinkages and other faults if the same are not repaired, rectified and make good after fourteen working days from the date of written notification by the SO Rep and the cost and expense incurred shall be recovered from the Contractor. In addition, the SO Rep shall exercise his rights under Clause 1.6 "Nuisance and Irregularities" to impose a further charge on the Contractor.

1.1.45 Noise Nuisance Judicious management and control over the activities within the Site shall be exercised by the Contractor

for the abatement of noise nuisance. All necessary actions shall be taken to ensure compliance to the latest noise control regulations imposed by the ENV or any relevant authorities.

1.1.46 Recovery Of Legal Costs For Court Proceedings All legal costs, charges and expenses (including but not limited to solicitors' fees as between solicitor and

client) incurred by the Employer for the purpose of or incidental to the enforcement by the Employer of any rights and remedies under the Contract or any other contracts between the Employer and the Contractor or in respect of any garnishee proceedings which may be brought or commenced against the Employer by the Contractor's creditors may be deducted by the Employer from monies due or becoming due to the Contractor including any retention monies, financial bonds or security deposits or other bonds.

1.1.47 Machinery Boundary The Contractor shall comply with the Mass Rapid Transit Corporation Code Of Practice For Railway

Protection when the works are carried out within Mass Rapid Transit Corporation protection zone. Submit proposals on effective measures for the protection of Mass Rapid Transit above ground structure together with the detail of activities of mobile cranes, tower cranes and other mechanical equipment adjacent to Mass Rapid Transit line structures to the SO Rep for approval at least one month prior to the use of such equipment. No jib or lifting appliance or any other moving or stationery part of the mechanical equipment shall encroach within 6m on plan from the edge of the nearest Mass Rapid Transit above-ground or at-grade structure unless the equipment is restricted to work beneath the structure. The foundation of the mechanical equipment shall be certified structurally sound and adequate by the Contractor's professional engineer prior to its installation.

Auto cut-off system shall be installed for tower cranes to prevent the top of boom to swing closer than 6m

from edge of viaduct structure. The jibs of the cranes must always be pointed away from Mass Rapid Transit line structure. The temporary access shall be stable and level for machinery to move on. Regular checks shall be carried out to ensure that all mechanised equipment are in good working condition at all times. Only experienced, trained and competent operators shall be employed for mobile cranes, tower cranes and other mechanical equipment. Temporary height restriction gantry with signboard shall be installed 6m away from the edge of both sides of viaduct structure for any access passing underneath the Mass Rapid Transit line structures.

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1.1.48 Mobile Cranes Before the use of mobile crane, the Contractor shall submit the following to the SO Rep for approval and

record : (a) Layout and details of crane access endorsed by Contractor's PE. (b) Technical data of cranes. (c) Latest 3 - monthly maintenance certificate. (d) Latest overhaul check certificate. Before putting the crane into operation, the Contractor shall submit the following documents and data to

the SO Rep for record. Copies of all relevant documents shall be kept in the site office or in the cabins of the cranes, as the case may be.

(a) Certificate of test/thorough visual examination of lifting equipment. (b) Inspection record for the construction of crane access. (c) Rules for the safe use of cranes. (d) Certificate of competency licensed for crane operator. (e) A capacity chart for each type of crane used. (f) Name of supervisor who supervises the hoisting operation, positioning and slewing. The licensed crane operator must carry out daily inspection of cranes before use. The Contractor shall

ensure that the construction of crane access is properly constructed and carry out daily check of crane access. Steel plates shall be laid over the compacted hardcore for the crane access if the Site is next to existing buildings, public roads and MRT lines. Barriers shall be installed next to the depression or excavated area. The Authorised Examiner shall submit the checklist of his inspection and testing of cranes to the Contractor. Test certificate, overhaul certificate, maintenance certificate, all inspection records by licensed crane operator, site engineers, Authorised Examiner shall be properly documented and kept on the Site for examination by the SO Rep upon request. Moment limiters shall be installed for all cranes. The Safety Factor for mobile crane shall have a minimum of 1.3 which includes the built-in factor of safety for the mobile crane. The lifting load shall include the weight of the component, the spreader beam and the lifting device. The tip load shall have the capacity to hoist the heaviest component including all necessary lifting appliances. A Permit-To-Hoist must be obtained before any hoisting operation is carried out. The Contractor shall station a supervisor full time on the Site to supervise and guide the licensed crane operator. The use of crane shall be stopped immediately should the Contractor fail to comply with all the above requirements.

1.1.49 Work Site Computer Equipment Provide the following computer hardware, accessories and software within the Time for Completion for the

exclusive use of the SO Rep : Computer Hardware and Accessories (hereinafter referred to as `the Hardware' for the purposes of this clause including sub-clauses) : 1 number Pentium 4 PC; 1 number A4 Laser Printer; 1 number A4 Color Scanner; 1 number Broadband Modem with Broadband Communication Line, or a 56Kbps Data/Fax Modem with 1 additional Telephone Line, or a Wireless Device as required by the SO Rep; 1 number Uninterruptible Power System; 1 number PC Screen Filter; 10 numbers 3.5 inch Floppy Diskettes; Computer Software (hereinafter referred to as `the Software' for the purposes of this Clause including sub-clauses) : 1 number Microsoft Windows 2000 Professional Edition, or latest version; 1 number Microsoft Office 2000 Professional Edition, or latest version; 1 number Norton Internet Security software Version 3.0, or later, 1 number F-Secure Anti-Virus version 5.40, or later. Hardware previously approved for HDB work sites shall also be accepted provided that the approved PC

is upgraded to (1) 512 MB RAM and installed with a 30 GB hard disk, a 48-speed CDROM drive and a 250MB Zip Drive, or better, (2) the modem is a broadband modem or 56Kbps modem, or a wireless device as required by the SO Rep. Software previously approved for HDB worksites shall be upgraded to the versions as described in this Clause.

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1.1.49 Work Site Computer Equipment (Contd) Ensure that the Hardware and Software are in good working condition to the satisfaction of the SO Rep,

and pay for all maintenance and license fees for the Hardware and Software throughout the period from one week before contract commencement until three weeks after the Date of Substantial Completion. Also pay for all expendable items including 80g per m2 A4 printing papers, toner cartridges, image drum, diskettes, screen cleaning kits, subscription, excess-hours usage and service maintenance fees related to communication devices etc during the same period. Also provide the necessary furniture, including separate table and chair for the computer equipment, and light partitions if required and as approved by the SO Rep. Also provide plastic dust covers, accessories, adequate power supply including uninterruptible power system and additional telephone line at the Contractor's own expense to accommodate and facilitate the usage of the Hardware and Software. Provide a communication device, either an broadband device, a 56Kbps modem device or a wireless device as required by the SO Rep. Pay for such device, all related charges including installation, registration, connection, subscription, usage, service maintenance, and expendable items including batteries etc for the device.

Submit specifications and details of the Hardware and Software for approval by the SO Rep TWO WEEKS

before contract commencement and BEFORE the purchase or leasing of the Hardware and Software. Also make and pay for such necessary arrangement for the hardware and software to be tested at the relevant Consultants office and subsequent delivery to work site upon request by the SO Rep.

Ensure that only authorised software are used with the Hardware and obtain written approval from the SO

Rep before installing any software other than the ones specified herein into the Hardware. Also ensure that the Hardware and Software are not used for any other purpose unless approved in writing by the SO Rep.

If the Contractor fails to make available the Hardware and Software by one week before contract

commencement or fails to rectify within 3 days any hardware or software faults, the SO Rep will make the necessary arrangement to acquire or to rectify and all expenses thus incurred shall be deducted from the payment due to or becoming due to the Contractor.

Make all necessary arrangement and provision for securing the Hardware and Software in the site office.

Replace any stolen or missing Hardware and Software within 3 days of such occurrence, failing which the SO Rep will make the necessary arrangement to acquire the Hardware and Software and all expenses thus incurred shall be deducted from the payment due to or becoming due to the Contractor.

Make and pay for such necessary arrangement for the hardware to be delivered to the relevant

Consultants office for trouble-shooting of PC problems, software upgrade and removal, and subsequent delivery to work site upon request by the SO Rep.

All the Hardware and Software except the Zip disks, floppy diskettes, computer printed materials, working

files and HDB application files created or installed by the SO Rep will be returned to the Contractor three weeks after the Date of Substantial Completion.

The Hardware shall comply with the following technical specifications : (a) IBM PC or compatible Shall be a PCI-bus Intel Pentium 4 PC, certified by Novell Testing Laboratory for working as a

Netware 5.1x client workstation, or belongs to a PC family an earlier model of which was certified by the same authority, or certified under ISO 9001 or 9002 by the proper authority, or other approved by the SO Rep.

Able to work with the Local Area Network located at the relevant Consultants office through

broadband communication line, telephone line or wireless device. Able to withstand the current and voltage variations as supplied from ordinary power generator on the Site through uninterruptible power system. Appropriate protection against rough handling on construction site and RF interferences.

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1.1.49 Work Site Computer Equipment (Contd) (a) IBM PC or compatible (Contd) The PC shall also comply at least with the following specifications :

Provided with Intel Pentium 4 2.0 GHz or higher processor; Provided with 256 KB integrated, full-speed L2 cache; Provided with Intel 845 Chipset. or better; Provided with at least 512 MB of PC133 SDRAM or better, upgradeable to 3 GB or more. Provided with flash system BIOS of the version not earlier than 12 months from the date of delivery. Provided with at least two empty 32-bit PCI expansion slots, one AGP 4x slot, four USB 2.0 ports, one parallel port, two serial ports, and two PS/2 ports. Provided with one AGP 4x or higher video card with at least 32 MB of video memory. Provided with one Sound Blaster compatible sound card and amplified stereo speakers. Provided with one 1.44 MB 3-inch floppy diskette drive. Provided with one 30 GB, 7200 rpm, IDE ATA100 hard drive, or better. Provided with one 48x or higher internal IDE CD-ROM drive. Provided with one 17-inch SVGA color monitor, 0.28 mm or smaller dot-pitch, 32-bit true color at 1024 x 768 pixels, 75 Hz or higher vertical frequency and 35 kHz or higher horizontal frequency. Provided with one 104-key Windows keyboard. Provided with one Microsoft optical wheel mouse or equivalent with one rubber-based mouse pad not smaller less than 8-inch by 9-inch. Provided with one power supply of at least 200 watt at 220/230V 50Hz. Provided with one Netrust compatible smart card reader. Provided with locking device for locking the system chassis and monitor to office furniture or fixtures. Provided with locking device for locking up the system chassis to prevent access to internal components. Preloaded with Microsoft Windows 2000 Professional or later. Certified by Microsoft for compatibility with the provided Windows operating system. Able to work with the other Hardware and Software as specified in this Specifications. (b) Laser Printer Shall be a A4 laser printer, or other approved by the SO Rep. The printer shall also comply with the

following specifications : Support PCL language. Print at 8 pages per minute. Print at 600 x 600 dpi resolution. Provided with 45 scalable TrueType fonts, and support downloadable bitmap fonts. Provided with 2 MB of RAM in additional to ROM memory. Achieve a duty cycle of 2500 single-sided pages per month. Provided with USB or Parallel Interface Provided with 100-sheet Input Bin and 100-sheet Output Bin for A4-size paper. Support A4, letter, legal and executive paper size. Print on single sheet paper, envelopes, mailing labels and transparencies. Support Windows Plug and Play installation. Able to work with the Software as specified in this Specifications. (c) Colour Scanner Shall be a A4 flatbed colour scanner, or other approved by the SO Rep. The scanner shall also

comply with the following specifications : Provided with colour CCD photoelectric device. Support A4 and letter document size. Support Micro Step Drive technology. Support colour 42-bit and grayscale 14-bit scanning depth. Scan at 1200 x 2400 dpi optical resolution. Scan at 32 sec per page for colour 300dpi A4 page and 11 sec per page for monochrome 300dpi A4 page. Provided with USB interface. Support film adaptor. Able to work with the Software as specified in this Specifications.

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1.1.49 Work Site Computer Equipment (Contd) (d) Communication Devices The communication device shall be a broadband modem with a broadband communication line, or

a 56Kbps modem with one additional telephone line, or a wireless device as required by the SO Rep. The specifications for each mode of communication are specified below :

(i) Broadband Modem Communication Shall subscribe to IDA-approved broadband provider in Singapore. Shall provide one Broadband Modem, User Guide and Software CD. Shall provide Splitter, Microfilters, or Dual-jack Adapter if applicable. Shall provide communication line for broadband modem. Shall pay for all one-time charges including modem and accessories, registration, installation, un-installation, un-registration and related fees for the broadband service. Shall pay for recurrent charges throughout the period from one week before contract commencement until three weeks after the Date of Substantial Completion including subscription fee, usage fee, all excess-hours usage charges, and service maintenance charges for the broadband service. Shall pay for the registration fee, installation fee, subscription fee, usage fee and related fees for the communication line used for the broadband communication. Shall submit monthly broadband subscription bills to the SO Rep for record purpose. Shall work with the communication infrastructure installed in the HDB and worked with the VPN software provided by the HDB. Shall be compatible with the proposed hardware and software. (ii) 56Kbps Modem Communication Shall provide a ITU V.90 56Kbps data/fax modem with one additional telephone line. Shall pay for all charges related to the use of the telephone line including registration fee, installation and connection fees, subscription fee, usage and related fees. The Modem shall also comply with the following specifications : Shall pass a file-transfer benchmark test set by the Civil Engineering Department, HDB. Shall transmit at speeds up to 56Kbps with throughput up to 115.2Kbps. Shall be able to work with Class 1 or Class 2.0 fax software to exchange faxes with Group III fax machines worldwide at speeds up to 14.4Kbps. Shall support basic AT command set. Shall be provided with surge protector. Shall be compatible with CISCO 3640 ISDN Communication Server. Shall be compatible with other proposed Hardware. Shall be compatible with ITU V.90 56 Kbps, and ITU V.34 33.6 Kbps. Shall be compatible with ITU and Bell standards from 56 Kbps to 1.2 Kbps. Shall have V.42/MNP 2-4 error control, V.42 bis/MNP 5 data compression. Shall support Windows Plug and Play installation. (iii) Wireless Communication The proposed Wireless Device shall comprise of a Data Card with support software and

drivers. Shall pay for all charges related to the use of the wireless communication including registration fee, installation and connection fees, subscription fee, usage and related fees.

The Wireless Device shall comply with the following specifications : Certified by Info-Communications Development Authority of Singapore for use in Singapore. Shall be a GSM or GPRS or 3G device whichever approved by the SO Rep. Shall support wireless data communication between the proposed PC and the Computer Servers located at HDB Hub. Provided with all necessary support software for data communication with the Wide Area Network Servers located at HDB Hub. Provide data and fax capability. Shall be a PCMCIA card or equivalent. Provided with necessary internal or external adapter for the PCMCIA card to work with the proposed PC; Compatible with the proposed hardware and software.

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1.1.49 Work Site Computer Equipment (Contd) (e) PC Screen Filter The Proposed PC Screen Filter shall comply with the following specifications :

Shall be full 17 inch diagonal viewing area. Shall eliminate up to 99% VDT glare. Shall block minimum 98% ELF/VLF E-Field radiation. Shall block ultraviolet ray (UV `A' 90% UV `B' 100%). Shall reduce reflection by up to 99%. Shall eliminate static charge & dust build up. Shall eliminate screen flicker. Shall enhance contrast, color and resolution. Shall have high efficiency anti-reflective (HEA) & anti-glare coating on both sides of filter. Shall be made of durable tempered glass or equivalent. Shall be made of flat frame with hangers. Shall be life time warranty. (f) Uninterruptible Power System The proposed Uninterruptible Power System shall be able to protect the Hardware from voltage

surges and provide a minimum 15 minutes backup time at full load from power failure. The Uninterruptible Power System shall also comply with the following specification :

Shall have input voltage of 230 Volt AC. Shall have input frequency of 50/60 Hz single phase. Shall have output power rating of 600/400 VA/Watts. Shall have output voltage of 220 - 230 Volt AC. Shall have sine wave output waveform. Shall have output frequency of 50/60 Hz. Shall sound alarm during power surges and when input power fails. Shall have appropriate protection against power surges. Shall have maintenance-free spill-proof sealed battery. 1.1.50 Workers' Quarters All workers' quarters erected on the Site shall be constructed using metal containers. If the Contractor

does not wish to use metal container for the workers' quarters, he may propose to use suitable proprietary system/material (other than timber and plywood) for the design of the workers' quarters which shall be subject to approval by the SO Rep. The Contractor shall submit detailed drawings of the proposed workers' quarters, which shall be aesthetically acceptable. Proposals for the design, configuration and layout, taking full consideration of the site constraints and conditions, shall be submitted to the SO Rep for approval within two weeks upon taking over the Site.

Qualified persons shall be appointed to look into the details pertaining to structural design, sanitary, water

and electrical installations. These detailed plans for the proposed structure including design calculations shall be certified by the Contractor's Professional Engineers and submitted to the SO Rep prior to the construction. The design shall comply with all statutory (e.g. ENV & PUB) requirements and the Technical Guidelines for the Fire Safety in Temporary Buildings in Construction Sites, including any amendment thereto, issued by FSSD; and the Building Control (Temporary Buildings) Regulations including any latest requirements by BCD, BCA.

The Contractor shall erect the workers' quarters strictly in accordance with the details pertaining to

structural design, sanitary & water installations and electrical installations, as certified by his Professional Engineers and the HDB approved site layout plans. The Contractor shall submit to the SO Rep, the Certificates of Supervision endorsed by the Professional Engineers, for the erection of the workers' quarters.

The workers' quarters shall comply with the following general requirements : 1. Centralised cooking area shall be provided and shall be compartmentalised if there are more than

one religious group staying in the workers' quarters. The cooking area shall be located away from the workers' quarters.

2. One rubber bin shall be provided in each container and at each staircase for the disposal of

rubbish. All refuse shall be cleared off from the Site daily.

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1.1.50 Workers' Quarters (Contd) 3. Cabinets for each worker to put clothing within the container shall be provided. 4. "No Smoking/No Littering" signboards shall be displayed at conspicuous location. 5. No additional wiring shall be allowed within the container other than those provided. 6. White lights and wall fans shall be installed in each container and also along the corridor. 7. Two no. of casement/sliding glass windows shall be provided per container. 8. Electrical installations/wiring shall be checked monthly by a qualified electrician. 9. Properly zoned and covered area at the ground floor, near the workers' quarters, shall be provided

for the hanging of wet clothing. 10. The external facade of the workers' quarters shall be painted to a colour scheme as approved by

the SO Rep. The Contractor shall submit the proposed colour scheme to the SO Rep for approval within two weeks upon taking over the Site.

11. House rules in appropriate languages shall be displayed in workers' quarters. 12. The container shall be of minimum size 3.0 m x 6.0 m and not more than six persons shall be

allowed to stay in one room. 13. The staircase and the corridor shall have a minimum clear width of 1.2 m. 14. One chemical powder fire-extinguisher for every 3 containers shall be provided. 15. One staircase shall be provided for every six containers. 16. Proper apron, apron drain and rainwater downpipe shall be constructed along the perimeter of the

workers' quarters, to cater for the exp