police commissionner office...
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POLICE COMMISSIONNER OFFICE BUILDING AHMEDABAD
MEP DESIGN BASIS REPORT
Gujarat State Police Housing Corporation Limited
Issue/revision Issue1/R0 Issue2/R1 Issue3/R2
Remarks Submission Information Revised as per
G+7
Configuration
Date 15-06-2015 10-07-2015 30-12-2016
Prepared by Lalit/Pragyanand
/Prabhat
Lalit/Pragyanand
/Prabhat
Lalit/Amit/Gaurav
Signature
Checked by Niraj / Vivek Rajiv Mishra Tanuj/
Pragyanand/
Prabhat
Signature
Approved by Parvendera K.
Chauhan
Vikas Bhardwaj Vikas Bhardwaj
Signature
Project Name /
Number
ACPO, Ahmedabad DESIGN BASIS REPORT
Contents
1 INTRODUCTION .................................................................................................................. 6
2 DESIGN INPUTS ................................................................................................................. 6
1 GENERAL ............................................................................................................................ 7
2 DESIGN CODES & STANDARDS ...................................................................................... 7
3 DESIGN PARAMETERS ..................................................................................................... 8
3.1 CLIMATIC CONDITIONS ................................................................................................... 8
3.2 OUTDOOR DESIGN CONDITIONS .................................................................................... 8
3.3 INTERNAL DESIGN CONDITIONS- AIR CONDITIONING AREA ............................................. 8
3.4 BUILDING ENVELOP ........................................................................................................ 9
3.5 OUTDOOR AIR REQUIREMENT ........................................................................................ 9
3.6 LIGHTING LOAD ............................................................................................................... 9
3.7 SELECTION OF EQUIPMENT .......................................................................................... 16
HIGH SIDE: ................................................................................................................................ 16
LOW SIDE: ................................................................................................................................ 16
3.8 SAFETY FEATURES: .................................................................................................... 18
4 DESIGNING PARAMETERS: ............................................................................................ 19
5 MECHANICAL VENTILATION .......................................................................................... 19
PART – 2 – ELECTRICAL ........................................................................................................... 22
1 GENERAL .......................................................................................................................... 22
2 DESIGN STANDARDS/GUIDELINES FOLLOWED: ........................................................ 22
3 DESIGN PHILOSOPHY ..................................................................................................... 22
4 STANDARD & CODES ...................................................................................................... 23
5 SCOPE: .............................................................................................................................. 27
6 ASSUMPTIONS/ ELECTRICAL DESIGN CRITERIA: ...................................................... 27
6.1 DESIGN BASIS .............................................................................................................. 28
6.1.1 ILLUMINATION SYSTEM ................................................................................................. 28
6.1.2 DESIGN PARAMETERS .................................................................................................. 29
7 POWER DISTRIBUTION SCHEME:- ................................................................................ 30
7.1 ELECTRICAL LOAD ESTIMATION ............................................................................... 30
7.2 HT SUPPLY & HT SUBSTATION:- ................................................................................ 32
7.3 LT POWER DISTRIBUTION & DG BACKUP:- .............................................................. 32
7.4 POWER FACTOR IMPROVEMENT & HARMONIC FILTER ......................................... 33
7.5 CABLE SIZING & VOLTAGE DROP CALCULATION................................................... 33
7.6 INTERNAL ELECTRIFICATION:- .................................................................................. 33
7.7 LIGHTING:- .................................................................................................................... 34
7.8 UPS SYSTEM:- .............................................................................................................. 34
7.9 LIFTS .............................................................................................................................. 36
7.10 CABLE TRAY AND CABLE TRAY ROUTES ................................................................ 36
7.11 EARTHING & LIGHTNING PROTECTION .................................................................... 36
7.11.1 EARTHING: ...................................................................................................................... 36
7.11.2 LIGHTENING PROTECTION ........................................................................................... 37
7.12 EXTERNAL AREA LIGHTING ....................................................................................... 37
8 INTELLIGENT ADDRESSABLE TYPE FIRE ALARM SYSTEM ..................................... 38
9 DATA / VOICE CABLING .................................................................................................. 39
10 CLOSED CIRCUIT TELEVISION SYSTEM ...................................................................... 39
PART – 3 - PLUMBING /SANITARY / WATER & WASTE WATER TREATMENT ................... 41
1 GENERAL .......................................................................................................................... 41
2 STANDARDS & REGULATIONS ...................................................................................... 41
3 SOURCE OF WATER SUPPLY: ....................................................................................... 41
3.1 WATER SUPPLY SYSTEM: .......................................................................................... 41
3.2 WATER TREATMENT: .................................................................................................. 42
3.3 SANITARY DRAINAGE ................................................................................................. 43
3.3.1 3-PIPE SYSTEM ............................................................................................................... 43
3.3.2 VENT TERMINATION ....................................................................................................... 43
3.3.3 STORM WATER DRAINAGE ........................................................................................... 43
3.4 ANNEXURES FOR PLUMBING AND SANITARY WORKS: ......................................... 43
3.5 HOT WATER SYSTEM: ................................................................................................. 43
3.5.1 SOLAR COLLECTION ..................................................................................................... 44
3.6 CAR PARK DRAINAGE ................................................................................................. 44
3.7 SEWERAGE: .................................................................................................................. 45
3.8 SEWAGE TREATMENT PLANT (60 M3 /DAY): ............................................................ 45
3.8.1 PROCESS DESCRIPTION: .............................................................................................. 47
3.9 STORM WATER DRAINAGE SYSTEM: ........................................................................ 49
3.10 IRRIGATION SYSTEM: .................................................................................................. 49
3.11 MATERIAL OF CONSTRUCTION (MOC) FOR PLUMBING & SANITARY WORKS: .. 50
4 PART 4: FIRE PROTECTION AND SPRINKLER SYSTEM ............................................. 64
4.1 DESIGN CRITERIA: ....................................................................................................... 64
4.2 SALIENT FEATURES OF THE PROJECT .................................................................... 64
4.3 GENERAL ......................................................................................................................... 64
4.3.1 Basis of Design ............................................................................................................... 66
4.3.2 SYSTEM DESCRIPTION:................................................................................................. 66
4.3.3 YARD HYDRANT & INTERNAL HYDRANT (WET RISERS):......................................... 66
4.3.4 FIRE WATER SOURCE: .................................................................................................. 66
4.3.5 PRESSURISATION SYSTEM: ......................................................................................... 67
4.3.6 MODE OF OPERATION: .................................................................................................. 67
4.3.7 FIRE BRIGADE INLET CONNECTIONS: ........................................................................ 67
4.3.8 PRESSURE VESSEL: ...................................................................................................... 67
4.3.9 HAND APPLIANCES: ...................................................................................................... 67
4.3.10 SPRINKLER SYSTEM: .................................................................................................... 68
4.3.11 Special Fire Suppression System ................................................................................. 69
4.3.12 MATERIAL OF CONSTRUCTION (MOC) FIRE PROTECTION WORK: ........................ 70
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT
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1 INTRODUCTION
The purpose of this report is to describe the Design intent of Mechanical, Electrical, and
Plumbing (MEP Services) proposed for Ahmadabad Commissioner Police Office (ACPO) Building.
The building is divided into two configurations. The centre of the building is of G+7 configurations
and rest of the building is G+1 with a common basement for car parking & services. This building
comes under Office building category.
The development consists of the following key areas:
Conference & Administration
Joint Commissioner of Police Administration
Additional Commissioner of Police Traffic & Head Quarter
Joint Commissioner Section 1 & 2
JCP control
JCP special branch
Commissioner of Police
Common Areas
2 DESIGN INPUTS
This report has been compiled using the following inputs from the design team:
Architectural layout design drawings,
Assumed Electrical Supply Voltage Available at site from Local Power Authority,
The design criteria and parameters to be used for designing.
We note the following development work is required from specialist consultants to allow detail
design migration to the next stage:
IT Consultant
F&B Consultant
Landscape consultant
Facade Lighting
Water features consultant
Interior designer consultant
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PART – 1 - HVAC SYSTEM
1 GENERAL
It is proposed to provide air conditioning & air cooling system in the building with the help of
economical and efficient system for all areas except common Storage rooms, pantries, Staircase,
toilets etc.
The Mechanical Ventilation has been proposed for toilets, Pantry, Car parking, DG Room, Pump
room, Transformer room and HVAC Plant room.
The following points have been explained in this Report:
Basis of Design
Parameters for Air-conditioning
Air-conditioning Load
Recommendation for air-conditioning system
Schemes for Air-conditioning system
Air cooling system
Car parking ventilation
Toilet Ventilation system
Staircase, lift well & lift lobby pressurization system
The system is designed keeping in view of following design philosophy:
Continuity & reliability.
Flexibility of Operation.
Concentration/distribution of loads.
Safety of personnel and equipment.
Ease of maintenance.
Maximum interchangeability of equipment’s.
Simplicity of operation.
Conservation of energy.
2 DESIGN CODES & STANDARDS
National Building Code India (NBC)
Energy conservation building Code (ECBC)
ASHRAE Standard 62.1.2010
ASHRAE Standard 90.1.2010
ISHRAE Handbook
Bureau of Indian standard (BIS)
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3 DESIGN PARAMETERS
3.1 CLIMATIC CONDITIONS
Location : Ahmedabad
Climatic Zone : Hot & Dry
Latitude : 23°02’ N
Daily Range : 26 ° F
3.2 OUTDOOR DESIGN CONDITIONS
Outdoor Design Conditions for Ahmedabad have been considered based on ISHRAE Handbook & are considered as follows:-
Summer
Dry Bulb Temp. 43.3 °C (110 °F )
Wet Bulb Temp. 25.6 °C (78 °F)
Monsoon
Dry Bulb Temp. 32.2 °C (90 °F )
Wet Bulb Temp. 28.3° C (83 °F)
3.3 INTERNAL DESIGN CONDITIONS- Air Conditioning AREA
Area Description Temperature RH %
Control Room, Rest Rooms, Cabins, Chamber, JCP rooms, PA rooms, Admin officer room, Meeting rooms, Conference, CP Cabins, Platinum war room etc.
23.0+1 ° C ( 73.4 + 2 °F) < 60 %
Lobby , Cafeteria, Library, Recreation, Passport Seva, Visitors Hall, Exhibition, Janseva, Coffee shop etc.
23.8+1 ° C ( 75 + 2 °F) < 60 %
IT switch & Reprographics Rooms 25.0+1 ° C ( 77 + 2 °F) < 60 %
Server room 20.0+1 ° C ( 68 + 2 °F) < 55 %
Staff Work station areas, Halls, Library Only Air-cooling System
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3.4 BUILDING ENVELOP
Considered
Glazing SHGC : 0.52 &
U Value: 0.23 Btu/hr-sq. ft-°F) - As per actual architectural
inputs.
External Wall U Value : 0.34 Btu/hr-sq. ft-°F)
Floor/Ceiling U Value : 0.38 Btu/hr-sq. ft-°F
Roof
Max. U Value : 0.14 Btu/hr-sq.ft-°F (assumed Insulated With 1
inch thick expanded polystyrene or equivalent material)
3.5 OUTDOOR AIR REQUIREMENT
Area Description ASHRAE 62.1-2010
Lobby, Reception, Work station area, Meeting
rooms , Conference room, control room,
Officers Cabins, Chambers, Rest rooms,
control room, Auditorium etc.
5 CFM / Person + 0.06 CFM/ Sq. ft.
Library 5 CFM / Person + 0.12 CFM/ Sq. ft.
Pre-function, Exhibition Centre 7.5 CFM / Person + 0.06 CFM/ Sq. ft.
Coffee Shop , Canteen, Recreation room 7.5 CFM / Person + 0.18 CFM/ Sq. ft.
Computer cell, Media room 10 CFM / Person + 0.12 CFM/ Sq. ft.
Gym 0.3 CFM/ Sq. ft.
3.6 LIGHTING LOAD
Area Description (As per ECBC)
Rest room, 0.90 W/ Sq. ft
Lift Lobby, Exhibition Centre cum Museum,
Waiting Area
1.0 W/ Sq. ft
Office Area, Cabins, Platinum War Rm., IT
Switch Rm., Interrogation Rm., Computer Cell,
Jan Seva Kendra, Control Rm., Server Rm.,
Technical Room, Computer cell, Gym
1.1 W/ Sq. ft
Lounge, Reception, Recreation, Library 1.2 W/ Sq. ft
Conference, Meeting Rooms, Media Rm, 1.3 W/ Sq. ft
Coffee Shop , Refreshment Corner, Canteen 1.4 W/ Sq. ft
Auditorium 2.6 W/ Sq. ft
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Air-conditioning Load
Based on the above parameters, the heat load calculation has been carried out for each area individually. The heat load summary is as below:
SL Floor Room Description AC Area
sq.ft Ht (ft)
Occupancy (Persons)
Fresh Air
Internal Load (Kw)
Lights (watts)
Inside Temp.
(°F)
Inside RH %
Summer Load TR
Monsoon Load TR
Dehu. CFM
BASEMENT
1 Basement UPS Room 720 13 2 53 30.0 1.0 80.0 55 11.9 11.5 4812
2 Basement Battery Room 634 13 0 38 30.0 1.0 80.0 55 10.9 10.6 4440
Total 1354 23 22 9252
GROUND FLOOR
1 Ground Floor Canteen 2300 13 180 1764 5.0 1.4 75.0 55 28.1 27.3 8046
2 Ground Floor Citizen Reception Centre 4520 13 100 771 5.0 1.1 75.0 55 17.6 14.3 6794
3 Ground Floor Lobby Area ( S. Ht) 3577 13 35 390 0.5 1.0 75.0 55 14.6 7.9 6703
4 Ground Floor Lobby Area (D. Ht) 1455 13 20 187 1.0 1.0 75.0 55 10.7 7.6 5176
5 Ground Floor Security Control Room 850 13 15 126 2.0 1.1 75.0 55 5.0 3.2 2309
6 Ground Floor Coffee Shop 1257 13 65 400 2.0 1.4 75.0 55 11.3 8.2 4593
7 Ground Floor Exhibition Centre 1145 13 15 181 1.0 1.0 75.0 55 7.2 4.0 3382
8 Ground Floor Jan Seva Kendra 2460 13 50 398 4.0 1.1 75.0 55 15.4 9.6 6983
9 Ground Floor Media Room 940 13 65 381 2.5 1.3 75.0 55 9.3 7.5 3531
10 Ground Floor Hall For Visitor( Passport) 1775 13 70 457 2.0 1.1 75.0 55 12.4 8.9 4979
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SL Floor Room Description AC Area
sq.ft Ht (ft)
Occupancy (Persons)
Fresh Air
Internal Load (Kw)
Lights (watts)
Inside Temp.
(°F)
Inside RH %
Summer Load TR
Monsoon Load TR
Dehu. CFM
11 Ground Floor Cabin (Passport) 155 13 3 24 0.2 1.1 75.0 55 1.2 0.7 582
12 Ground Floor Hall For Visitors (Domicile) 1775 13 70 457 2.0 1.1 75.0 55 12.4 8.9 4979
13 Ground Floor Cabin ( Domicile) 155 13 3 24 0.2 1.1 75.0 55 1.2 0.7 582
14 Ground Floor Control Room 13535 26 100 1312 77.0 1.1 73.4 55 76.1 66.0 37179
15 Ground Floor Briefing-Debriefing Room 1434 12.5 100 586 3.0 1.3 73.4 55 12.7 11.0 4987
16 Ground Floor Rest Room ( M & F) 400 12.5 6 54 0.4 0.90 73.4 55 2.0 1.2 966
Total 37733 7512 237 187 101771
FIRST FLOOR
1 First Floor Hall ( Recreation M & F) 2188 13 50 769 5.5 1.2 75.0 55 13.7 12.6 4390
2 First Floor Gym 2785 13 65 836 8.0 1.1 75.0 55 17.5 16.1 5420
3 First Floor Meeting Room 175 13 8 51 0.5 1.3 75.0 55 1.7 1.5 724
4 First Floor PA Room 117 13 3 22 0.4 1.1 73.4 55 1.1 0.7 564
5 First Floor JCP Control & Rest Room 587 13 6 65 0.5 1.1 73.4 55 2.6 1.7 1323
6 First Floor Waiting Area 655 13 50 289 0.5 1.0 73.4 55 5.9 5.2 2216
7 First Floor Conference Room 650 13 25 164 2.0 1.3 73.4 55 4.9 3.9 2183
8 First Floor JCP Spl Branch & Rest room 676 13 10 91 0.5 1.1 73.4 55 5.0 3.6 2608
9 First Floor PA Room 152 13 3 24 0.4 1.1 73.4 55 0.9 0.7 459
10 First Floor Asst. Commissioner Spl Branch (Admin)
355 13 6 51 0.5 1.1 73.4 55 2.1 1.4 1036
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SL Floor Room Description AC Area
sq.ft Ht (ft)
Occupancy (Persons)
Fresh Air
Internal Load (Kw)
Lights (watts)
Inside Temp.
(°F)
Inside RH %
Summer Load TR
Monsoon Load TR
Dehu. CFM
11 First Floor Asst. Immigration Common cell
355 13 6 51 0.5 1.1 73.4 55 2.1 1.4 1036
12 First Floor Asst. Commissioner Common cell
355 13 6 51 0.5 1.1 73.4 55 2.1 1.4 1036
Total 9050 2464 59.6 50.1 22994
SECOND FLOOR
1 Second Floor Multipurpose Hall & Green Room
3673 26.4 180 1120 10.0 1.3 75.0 55 24.10 22.55 8882
2 Second Floor Foyer 1167 13.0 50 320 2.5 1.2 75.0 55 8.99 6.90 3659
Total 4840 1440 33.1 29.4 12541
THIRD FLOOR
1 Third Floor Cabin (OS Inquiry) 125 13.0 3 23 0.2 1.1 73.4 55 0.89 0.55 431
2 Third Floor Cabin (Accounts) 121 13.0 3 22 0.2 1.1 73.4 55 0.75 0.51 349
3 Third Floor Chamber-1 121 13.0 3 22 0.2 1.1 73.4 55 0.90 0.56 436
4 Third Floor Chamber-2 121 13.0 3 22 0.2 1.1 73.4 55 0.90 0.56 436
5 Third Floor Chamber-3 114 13.0 3 22 0.2 1.1 73.4 55 0.85 0.53 411
6 Third Floor IT Switch Room-1 312 13.0 0 19 1.0 0.90 77.0 55 1.76 1.13 842
7 Third Floor Meeting Room 175 13.0 8 51 0.5 1.3 73.4 55 1.71 1.39 791
8 Third Floor Add. CP's Cabin 468 13.0 8 68 0.5 1.1 73.4 55 3.14 3.12 1767
9 Third Floor Rest Room 188 13.0 1 16 0.2 0.90 73.4 55 1.25 0.78 724
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SL Floor Room Description AC Area
sq.ft Ht (ft)
Occupancy (Persons)
Fresh Air
Internal Load (Kw)
Lights (watts)
Inside Temp.
(°F)
Inside RH %
Summer Load TR
Monsoon Load TR
Dehu. CFM
10 Third Floor Dep. Admin Officer 244 13.0 6 45 0.5 1.1 73.4 55 1.76 1.40 974
11 Third Floor Dep. Accounts Officer 241 13.0 6 44 0.5 1.1 73.4 55 1.64 1.28 901
12 Third Floor Pro-Office 227 13.0 5 39 0.5 1.1 73.4 55 1.65 1.43 919
13 Third Floor PA Chamber 145 13.0 3 24 0.4 1.1 73.4 55 1.11 0.76 621
14 Third Floor Lobby, Passage & Waiting room
509 13.0 15 106 0.5 1.0 73.4 55 3.40 2.24 1845
15 Third Floor IT Switch & Repro. Room-2 312 13.0 1 24 1.0 0.90 77.0 55 2.43 1.61 1158
16 Third Floor Control Room 350 13.0 3 36 3.0 1.1 77.0 55 2.40 1.81 1107
Total 3773 26.5 20 13710
FOURTH FLOOR
1 Fourth Floor IT Switch & Repro. Room-1 312 13.0 0 19 1.0 1.1 77.0 55 1.64 1.30 784
2 Fourth Floor Meeting Room 175 13.0 8 51 0.5 1.3 73.4 55 1.65 1.35 753
3 Fourth Floor JCP- HQ- Cabin 545 13.0 8 73 0.5 1.1 73.4 55 3.89 3.91 2205
4 Fourth Floor Rest Room 188 13.0 1 16 0.2 0.90 73.4 55 1.15 0.71 663
5 Fourth Floor OS- J Branch 215 13.0 6 43 0.5 1.1 73.4 55 1.46 1.41 800
6 Fourth Floor OS- C Branch 206 13.0 6 42 0.5 1.1 73.4 55 1.18 1.07 635
7 Fourth Floor Computer Cell 470 13.0 10 156 2.0 1.1 73.4 55 3.91 3.13 2196
8 Fourth Floor PA Chamber 145 13.0 3 24 0.4 1.1 73.4 55 1.06 0.76 591
9 Fourth Floor Lobby & Passage (ad.computer cell)
343 13.0 4 41 0.5 1.0 73.4 55 1.31 0.68 731
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SL Floor Room Description AC Area
sq.ft Ht (ft)
Occupancy (Persons)
Fresh Air
Internal Load (Kw)
Lights (watts)
Inside Temp.
(°F)
Inside RH %
Summer Load TR
Monsoon Load TR
Dehu. CFM
10 Fourth Floor IT Switch & Repro. Room-2 196 13.0 0 17 1.0 1.1 77.0 55 1.93 1.31 922
Total 2795 19.2 15.6 10282
FIFTH FLOOR
1 Fifth Floor Conference Room 643 13.0 30 189 1.0 1.3 73.4 55 6.46 5.74 3497
2 Fifth Floor Visitors Room 470 13.0 10 78 1.0 1.1 73.4 55 3.18 2.60 1768
3 Fifth Floor Technical Room 255 13.0 4 35 1.0 1.1 73.4 55 2.23 1.56 1269
4 Fifth Floor Discussion Room 186 13.0 8 51 0.3 1.3 73.4 55 1.39 1.08 738
5 Fifth Floor Meeting Room 175 13.0 8 51 0.5 1.3 73.4 55 1.65 1.39 753
6 Fifth Floor JCP- Office-1 577 13.0 8 75 0.5 1.1 73.4 55 4.51 3.45 2373
7 Fifth Floor Rest Room-1 132 13.0 1 13 0.2 0.90 73.4 55 0.68 0.36 354
8 Fifth Floor PA Room-1 128 13.0 3 23 0.4 1.1 73.4 55 0.76 0.58 355
9 Fifth Floor IT Switch & Repro. Room-1 313 13.0 0 19 1.0 0.90 77.0 55 1.81 1.41 871
10 Fifth Floor JCP- Office-2 577 13.0 8 75 0.5 1.1 73.4 55 3.63 3.20 1856
11 Fifth Floor Rest Room -2 132 13.0 1 13 0.2 0.90 73.4 55 0.71 0.39 373
12 Fifth Floor PA Room -2 128 13.0 3 23 0.4 1.1 73.4 55 0.74 0.55 354
13 Fifth Floor IT Switch & Repro. Room-2 313 13.0 0 19 1.0 0.90 77.0 55 2.23 1.44 1077
Total 4029 662 30.0 23.8 15636
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SL Floor Room Description AC Area
sq.ft Ht (ft)
Occupancy (Persons)
Fresh Air
Internal Load (Kw)
Lights (watts)
Inside Temp.
(°F)
Inside RH %
Summer Load TR
Monsoon Load TR
Dehu. CFM
SIXTH FLOOR
1 Sixth Floor IT Switch & Repro. Room-1 199 13.0 0 12 1.0 0.90 77.0 55 1.17 0.70 562
2 Sixth Floor Meeting Room 175 13.0 8 51 0.5 1.3 73.4 55 1.80 1.58 843
3 Sixth Floor IT Switch & Repro. Room-2 313 13.0 0 19 1.0 0.90 77.0 55 1.92 1.36 926
Total 687 81 4.9 3.6 2331
SEVENTH FLOOR
1 Seventh Floor Visiting Officers Waiting 410 13.0 8 65 0.2 1.0 73.4 55 3.12 2.54 1583
2 Seventh Floor Platinum War Room 546 13.0 15 108 1.0 1.1 73.4 55 4.23 3.68 2046
3 Seventh Floor Meeting Room 175 13.0 8 51 0.5 1.3 73.4 55 1.86 1.58 881
4 Seventh Floor CP's Cabin 836 13.0 10 100 0.5 1.1 73.4 55 6.41 5.10 3668
5 Seventh Floor Rest Room 261 13.0 1 21 0.2 0.90 73.4 55 1.40 0.82 812
6 Seventh Floor PA & Clerk Chamber 238 13.0 5 39 0.5 1.1 73.4 55 1.74 1.15 971
7 Seventh Floor Waiting area 359 13.0 20 122 0.2 1.0 73.4 55 4.14 3.02 2234
8 Seventh Floor IT Switch & Repro. Room-1 313 13.0 0 19 1.0 0.90 77.0 55 2.36 1.51 1145
9 Seventh Floor IT Switch & Repro. Room-2 313 13.0 0 19 1.0 0.90 77.0 55 2.19 1.42 1058
10 Seventh Floor Conference Area 2340 13.0 90 590 2.0 1.3 73.4 55 17.94 14.54 8072
Total 5791 45.4 35.4 22469
TERRACE
TFA 7.1 10.2 1500
GRAND TOTAL 70052 486 397 212484
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|MEP DESIGN BASIS REPORT 16
Based on the parameters and design basis given above, the total refrigeration load works out are 486 TR for the building. Taking diversity factor of 80 % on total load, total requirement of the AC plant shall be 388 TR.
To cater the above air-conditioning load, it is proposed to install 3 nos. water cooled screw type chilling machine ( 2 working + 1 standby) in AC plant room of 200 Tr. nominal capacity ( Minimum 195 tr. actual capacity) each.
3.7 SELECTION OF EQUIPMENT
HIGH SIDE:
(i) Chilling Machine: 3 Nos. Energy efficient water cooled Screw type Chiller of 200 Tr.
Nominal capacity each (2 Working + 1stand by) shall be installed in the AC plant room.
(ii) Chilled Water Primary Pumps: 3 Nos. Primary chilled water pumps of 480 USGPM capacity each (3 Nos. Working & 1 No. Stand by) shall be install in the AC plant room.
(iii) Chilled Water Secondary Pumps: Since the buildings have different-different
requirements of air –conditioning loads at different time , hence to cater this variable loads 1 set (2 Nos. working + 1 Stand by) of Secondary chilled water pumps of 480 USGPM capacity each shall be installed in the plant room for chilled water circulation to AHUs.
These pumps shall operate through VFDs to facilitate variable pumping system which will take care of part load requirement and hence saving in energy.
(iv) Condenser Water Pumps: To circulate the condenser water from chiller to cooling tower,
Condenser water Pumps of 600 USGPM each (2 Working + 1 Stand by) shall be installed in the plant room.
(v) Cooling Towers: 3 Nos. FRP Induced draft cooling towers of 7.5 lacs K.cal/hr heat
rejection capacity (2 Working + 1 Stand by) are installed, which shall be located at second floor terrace level.
LOW SIDE:
The following low side equipment are prepared in line with the above high side equipment to cater the air-conditioning services.
(i) Air Handling Units & System design:
The building has core area at the centre which has G+7 configurations & rest air conditioned area exists at both side of the core area at ground & first floor only. The core area has two nos. AHU rooms at the ends of each floor. Floor mounted air handling unit shall be placed in the AHU rooms at each floor (wherever air-conditioning required) to cater the air conditioning load of the adjacent areas.
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT 17
The area like seminar room, conference, Meeting rooms etc. has been provided with separate AHU which will run only when these areas will be in operation. Conditioned air from the AHUs will be taken through the G.S.S. ducting and will be supplied to conditioned areas through diffusers/ grills. Return air will be collected through similar diffusers/ grills mounted on false ceiling and will be taken to AHUs for reconditioning. Each floor consists of Add. CP/ JCP cabins & their rest rooms also. These areas shall be catered through separate ceiling suspended air handling units & the rest rooms are provided with separate small capacity fan coil units. The fresh air shall be taken in AHU rooms through louvers mounted on external wall of the AHU rooms. These louvers shall be provided with volume control dampers to control the fresh air quantity. The internal areas which are catered through individual AHU/FCU shall be provided with treated fresh air system. This TFA shall be mounted on terrace and the fresh air shall be feed through duct in each area. The core are of the building consists of IT switch room, which shall be catered through separate fan coil units. Security guard room, Media room, visitor hall, jan seva Kendra, exhibition hall,, gym etc. at ground & first floor level shall be catered through separate ceiling suspended air handling units. The building consists of a control room with double height configuration at ground floor having 24 hour of operation. To cater the air conditioning load, two nos. of AHU’s are proposed on both side of the control room. These AHU shall have two nos. of coils, one with chilled water system & other with Dx- type system. The Dx- coil of the AHU’s shall be connected with separate air cooled variable refrigerant volume/ flow type Outdoor units. When the central chilled water plant will be in operation, these outdoor units will be in shut- off condition & on shut down of central plant, these ODU will be in operation. The operation shall be performed by BMS system. Conditioned air from the AHUs will be taken through G.S.S. ducting and will be supplied to conditioned areas through jet diffusers from both side & the return air will be collected through grills mounted on false ceiling and will be taken to AHUs through return air duct for reconditioning. The building also consists of a server room which needs special attention for temperature & RH level of the room. Due to high sensible load, this area needs large capacity of cooling load. To cater these loads, Precision type ait conditioning system is proposed to install in the server room. To save the energy, it is proposed to provide the precision ac units with variable Capacity digital / inverter Scroll compressor to modulate the load as per requirement. The capacity of precision ac units shall be as per final heat dissipation of the server room. The outdoor units of the precision units shall be installed at the terrace level. Since the server room shall be in operation for 24 hours, hence stand by provision of PAC units are proposed so that the units can run in Sequence.
(ii) Piping: All chilled/condenser water pipes shall be of MS ‘C’ Class. The Pipes size 150mm & below shall be M.S. heavy class as per IS: 1239 and pipes size above 150mm shall be welded black steel pipe heavy class as per IS: 3589.
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT 18
(iii) GSS Ducting: All ducting shall be machine made of G.I. sheets as per IS: 655 (amended upto date) and for certain areas wherever required it will be made at site.
(iv) Insulation: The supply & fresh air ducts will be insulated with Closed Cell Cross Linked Polyethylene foam with factory laminated aluminium foil at one side. The initial section of all the supply air ducts will be provided with acoustic lining with resin bonded fibre glass wool & covered with reinforced Plastic tissue paper and 0.5 mm thick perforated aluminium sheet at the inside surface of ducts to prevent transmission of noise to air-conditioned area. The supply air duct exposed to atmosphere shall be provided with Closed Cell Cross Linked Polyethylene foam having factory laminated fibre glass cloth & finally provided with two coats of epoxy paints at one side to protect the insulation from water & UV rays.
The chilled water pipes shall be insulated with closed cell elastomeric nitrile rubber of class 'O' insulation applied by adhesive confirming to standard specifications of required thickness depends on the pipe sizes and finally finished with 0.63mm aluminium sheet cladding. The wall and ceiling of AHU rooms shall be acoustically treated by providing resin bonded fibre glass wool covered with reinforced fibre glass tissue & perforated aluminium sheet to prevent transmission of noise to adjoining air-conditioned areas.
(v) Main Electrical Panel: Main HVAC panel shall be installed in the Plant Room.
(vi) Electrical Control Panel for AHUs: AHU panel are proposed to install in the AHU rooms.
Evaporative Air Cooling System:
Evaporative air cooling system is proposed for staff works station areas, halls, library etc. In this system air is supplied through air washer units which consist of cooling pad, fan, water tank & pump and filter section. Water continuously flow over cooling pads and air from outside comes in contact with this cooling pad and get cooled further this cooled air is supplied to areas with the help of mechanical fan. In this process both the temperature and humidity of air changes. Since in this process, there is no re-circulation system of air, hence to make the system effective & control the humidity level, 80 % of the supplied air shall be exhaust out from the space with the help of mechanical exhaust fans. The Air washer units shall be housed in AHU rooms to serve the core area of the building and fresh air shall be taken through lovers. For area at ground and first floor except core area, the air washer units shall be placed at the open terrace level. The supply air from the Air washer unit will be taken through the G.S.S. ducting and will be supplied to areas through diffusers/ grills. Similarly fan section units shall be place at terrace level for exhaust purpose.
3.8 SAFETY FEATURES:
For fire safety, fire dampers with electric actuators interlocked with blowers will be provided in the initial sections of both supply and return air ducts in each AHU & the air washer units. The AHU/ Air washer units motor will be interlocked with the central fire alarm system of building, such that in case of detection of smoke or fire by fire alarm system, the AHU/ air washer units shall automatically shut off. Fire dampers have also been provided wherever the ducts are crossing fire zones.
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT 19
4 DESIGNING PARAMETERS:
Piping Design Maximum velocity : 8 Ft./Sec. (2.5 M/Sec) Maximum friction : 5 Ft./100 Ft. Run (5 M/100 M Run) AHU Design
Maximum face velocity across filters : 500 Ft./Min (150 M/Min.)
Maximum face velocity across cooling coils : 500 Ft./Min (150 M/Min.)
Maximum fan outlet velocity : 2000 Ft./Min (600 M/Min.)
Maximum fan speed : 1000 RPM
Maximum fan motor speed : 1450 RPM Duct Design Maximum flow velocity : 1500 Ft. /Min Maximum friction : 0.1 in WC/100 Ft. Run Maximum velocity at supply air outlet : 500 Ft. /Min.
5 MECHANICAL VENTILATION
The mechanical ventilation systems for various areas and for various purposes are explained as below. Basement:
The Basement in the building is proposed to be used for parking & services. This necessitates the basement to be provided with mechanical ventilation which includes supply and exhaust of stale air. Further, as per fire laws of the land, it is mandatory that in case of fire, smoke will also be removed from the basement. The system consists of vane axial flow fans. The entire supply and exhaust system are designed at 6 air changes per hour at normal mode and in the event of fire alarm this rate will increase to 12 air changes per hour with the help of additional fans. In addition to save the energy, each zone of the car parking area is provided with CO sensors which measure the concentration level of CO for the area & accordingly transmit the signal to fan for operation accordingly.
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|MEP DESIGN BASIS REPORT 20
The services area like Air Conditioning plant room, LT panel room & pump room will also be provided with mechanical ventilation system. Individual vane axial flow fans are proposed to install for fresh air & exhaust air. Fresh air will be drawn from outside and supplied to mechanically ventilated areas by means of ducts and grilles. Smoke Extraction:
The large occupancy areas like multipurpose hall & the control room are also provided with smoke extraction system at 12 air change per hour for exhaust purpose. These fans will be interlocked with fire signalling system. In case of fire these fans will be in operation. Pressurization:
It is required to pressurize lift well, lift lobby & Staircases in case of fire. The lift well & Staircase shall be pressurize at 50 pa. (Pascal) & Lift lobbies at 30 pa. (Pascal) as per NBC. Axial flow fans shall be installed at terrace level for this purpose. Control wiring of these fans shall be connected to central fire control panel and shall be operated automatically only in case of fire signal. Toilets
The common toilets of the building area shall be ventilated at 15 ACPH (Air Changer Per hours). The common toilet in the core area of the building shall be provided with common exhaust duct and fans. Other toilets exhaust is also planned for ducted exhaust through individual Inline/ propeller fans. The makeup air will be drawn through door transfer grill fixed on toilet doors. Pantry Each floor consist a pantry area which also needs some exhaust. Common exhaust air fan shall be installed at the terrace level & all the exhaust air will collected through common duct & exhaust out at the terrace level. Kitchen
The kitchen area at the ground floor level shall be provided with Fresh air & exhaust air system with air washer & wet scrubber units. The exhaust rate for kitchen area is planned at 30 ACPH & to create the negative pressure in the kitchen area, the fresh air shall be 15 % less than the total exhaust air quantity. The exhaust air duct for kitchen area shall be provided with fire duct wrap/fire paint or cladding with wire wrapping to provide at least one hour fire rating. Final ventilation requirement shall be as per the kitchen consultant. Printing Area
To prevent the spread of hazardous gases or chemicals generated by machines from these areas, it is required to create the negative pressure in this space with respect to adjacent space to maintain the indoor air quality in the air conditioned space. Propeller fan are installed at each are for this purpose.
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT 21
DG Room Ventilation:
Ceiling hung axial flow fan for supply and exhaust air are proposed for DG room ventilation system. The ventilation air requirement is as per manufacturer’s standard.
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT 22
PART – 2 – ELECTRICAL
1 GENERAL
The objective of “The Design Basis Report” is to briefly describe the salient features of
Electrical System taken into consideration for Ahmedabad Police Commissioner Office.
Various electrical facilities for the proposed Office Building have been envisaged
considering the usage of area, pattern of electrical load and relevant Indian Standards/
Codes & good engineering practice.
2 DESIGN STANDARDS/GUIDELINES FOLLOWED:
All electrical installations will be designed and specified in compliance with the
recommendations of the following codes and standards:
National Building Code of India 2005
National Fire Code
Relevant Bureau of Indian Standards
Indian Electricity Rules 2003
CPCB Guidelines
State Bye Laws
3 DESIGN PHILOSOPHY
Power distribution system to be designed keeping in view the following:
Continuity and reliability of power supply.
Flexibility of operation.
Concentration/distribution of loads.
Safety of personnel and equipment.
Compliance with various statutory provisions such as Indian Electricity Act and Rules,
National Electrical Code and the relevant B.I.S. Specifications.
Ease of maintenance.
Maximum interchange ability of equipment resulting in minimum inventories and spare
parts.
Minimum fire risk.
Simplicity of operation.
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|MEP DESIGN BASIS REPORT 23
4 STANDARD & CODES AS PER AMMENDED UP TO DATE
S. No. STANDARDS TITLE
(1) IS: 732 - 1989 Code of practice for electrical wiring installations.
(2) IS: 4648 - 1968 Guide for electrical layout in residential buildings.
(3) IS: 8061 - 1976 Code of practice for design, installation and maintenance of
service lines up to and including 650V
(4) IS: 8884 - 1978 Code of practice for installation of electric bells and call
system.
(5) IS: 5578 - 1985 Guide for marking of insulated conductor.
(6) IS: 11353- 1985 Guide for uniform system of marking and identification of
conductors and apparatus terminals.
(7) IS: 7752(Part-1)-1975 Guide for improvement of power factor in consumer
Installation: Low and medium supply voltages.
(8) IS: 3646(Part-1)-1966 Code of practice for interior illumination: Principles for good
lighting and aspects of design.
(9) IS: 3646(Part-2)-1966 Code of practice for interior illumination
Schedule of illumination and glare index.
(10) IS: 2672 - 1966 Code of practice for library lighting.
(11) IS: 10118(Part-1)-1982 Code of practice for selection, installation and maintenance
of switchgear and control gear: General.
(12) IS: 10118(Part-2)-1982 Code of practice for selection, installation and maintenance
of switchgear and control gear.
(13) IS: 10118(Part-3)-1982 Code of practice for selection, installation and maintenance
of switchgear and control gear: Installation.
(14) IS: 10118(Part-4)-1982 Code of practice for selection, installation and maintenance
of switchgear and control gear: Maintenance.
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT 24
S. No. STANDARDS TITLE
(15) IS: 2309 - 1989 Code of practice for the protection and allied structures
against lightning.
(16) IS/ IEC:62305 Code of practice for Advance Type Lightening Protection
(17) IS: 3043 - 1987 Code of practice for Earthing.
(18) IS: 5216(Part-1)-1982 Guide for safety procedures and practices in electrical work:
General.
(19) IS: 13032 - 1991 Miniature circuit breaker boards for voltages up to and
including 1000 volts AC.
(20) IS: 12640 - 1988 Residual current operated circuit breakers.
(21) IS:8623(Part-1)-1977 Factory built assemblies of switchgear and control gear for
Voltages up to and including 1000 V AC and 1200 V DC:
General requirements.
(22) IS: 8623(Part-2)-1980 Factory assemblies of switchgear and control gear for
Voltages up to and including 1000 V AC and 1200 V DC:
Particular requirements for busbar trunking system (bus
ways).
(23) IS: 694 - 1990 PVC Insulated cables for working voltages up to and
Including 1100 V.
(24) IS: 1554(Part-1)-1988 PVC insulated (heavy duty) electric cables: For working
voltages up to and including 1100 V.
(25) IS: 3961 (Part-5)-1968 Recommended current ratings for cables: PVC insulated
light duty cables.
(26) IS: 9537(Part-1)-1980 Conduits for electrical installations: General requirements.
(27) IS: 9537(Part-2)-1981 Conduits for electrical installations Rigid steel conduit.
(28) IS: 3480 - 1966 Flexible steel conduits for electrical wiring.
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT 25
S. No. STANDARDS TITLE
(29) IS: 3837 - 1976 Accessories for rigid steel conduits for electrical wiring.
(30) IS: 371 - 1979 Ceiling roses.
(31) IS: 3854 - 1988 Switches for domestic and similar purposes.
(32) IS: 4160 - 1967 Interlocking switch socket outlet.
(33) IS:1293 - 1988 Plugs and socket outlets of rated voltage up to and
including 250 volts and rated current up to and including 16
amperes.
(34) IS:11189 Standards for Dry Type Power Transformer
Elevator
(35) IS: 14655 Electrical traction lift
(36) IS: 14655/2000 Installation operation and maintenance
(37) IS: 14655/2000 Safety rules.
(38) IS: 14655/2001 Elevator components
(39) IS: 14671/2000 Manual inspection.
Transformer
(40) IS: 1180/1989 Dry type distribution transformer
(41) IS: 10028 Installation and maintenance of transformer
HT Breaker
(42) IS: 2516 (Part IV/Section -2) Circuit breaker
1982 amended up-to-date.
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT 26
S. No. STANDARDS TITLE
(43) IS: 3427 Metal enclosed switchgear control gear for 1000 volt
but not exceeding 12000 volt.
(44) IS: 2705 Current transformer
(45) IS: 3156 Potential transformer
(46) IS: 722 A.C. electricity Meter of Induction type
(47) IS: 3231 Electrical Relays
DG SET
(48) IS: 732-1989 DG installation, testing and commissioning
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|MEP DESIGN BASIS REPORT 27
5 SCOPE:
The report presents and analyses the present requirements and outlines the various systems to
be adopted.
The scope of work for electrical will include but not necessarily be limited to the following:
ELECTRICAL LOAD ESTIMATION
HT DESIGN SUBSTATION
LT POWER DISTRIBUTION & DG SET
POWER FACTOR IMPROVEMENT
INTERNAL ELECTRIFICATION
LIGHTING
UPS SYSTEM
CABLE CONTAINMENT & CONTAINMENT ROUTES
EARTHING & LIGHTENING PROTECTION
INTELLIGENT ADDRESSABLE FIRE ALARM & PA SYSTEM
CCTV SURVEILENCE SYSTEM
ACCESS CONTROL SYSTEM
6 ASSUMPTIONS/ ELECTRICAL DESIGN CRITERIA:
Single point connection at 11KV shall be available from Electricity Board.
HT Metering shall be done for the Complex by State Electricity Board.
Sub-station is proposed to be installed in basement area.
Maximum power factor proposed to be maintained is 0.95.
Maximum voltage drop design of the complete distribution system at the farthest point
from the Transformer shall be restricted to 5% which is in compliance with the Indian
Electricity Rules.
Fire Alarm System to be provided on accordance with IS Codes/ NFPA.
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|MEP DESIGN BASIS REPORT 28
6.1 DESIGN BASIS
6.1.1 ILLUMINATION SYSTEM
The provision of luminaries in various areas of the building has been designed to achieve
the following illumination levels:
S. No. DESCRIPTION OF SPACE
TYPE OF LIGHTING ILLUMINATION (LUX LEVEL)
1 Corridors and circulation spaces LED 150
2 Toilets LED 150
3 Staircases LED 100-150
4 Office Areas / Administration LED 250-350
5 Service Areas e.g. AHUs, Electrical Room etc. LED 150-200
6 Entrance LED 250-300
7 Record Room / Reprographics LED 250-350
8 Store LED 150-200
9 Control Room LED 300-400
10 Reception LED 250-300
11 Basement car parking T5 50-100
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|MEP DESIGN BASIS REPORT 29
6.1.2 DESIGN PARAMETERS
S.No. Parameter Description
1. Supply condition 11KV, 3-Phase, 50Hz
2. Electrical supply details 415V, 3-Phase, 50Hz
3. Generator Power output 100% of rated load
4. Operating mode Continuously running
5. Maximum line voltage drop 5% at farthest point from the
Transformer as per IER
6. Fault current rating 50 KA for MDB
7. Transformer impedance As per IS:2026 (Part-I) 1997
8. Conductor specifications HT cables : XLPE Aluminium
armoured conductor (earthed)
LT Cables : XLPE insulated & PVC
sheathed aluminium armoured conductor
Wires : FRLS type
9. Minimum rating of cables As per voltage drop calculation
10. Minimum conductor size for final
wiring 2.5mm2
11. Minimum conductor size for wiring
for earthing of final circuit 1.5mm2
12. Degree of Protection Degree of protection for distribution
panel enclosure shall be as per IS:13947-1993
13. HT panels (11KV) VCB type
14. Capacitors Heavy duty MPP type
15. MV Panels MV panel have type testing CPRI
16. Bus bars As per switch gear rating.
17. Fuel type Diesel (commercial )
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|MEP DESIGN BASIS REPORT 30
7 POWER DISTRIBUTION SCHEME:-
7.1 ELECTRICAL LOAD ESTIMATION
The below mentioned table clarifies the electrical load calculation & requirement for the
building/ premises with breakup of electrical loads etc.:-
ANNEXURE-1
SUMMARY OF ELECTRICAL LOADS FOR ACPO G + 7
S. No.
Description Connected Load (KW)
Demand Factor
Maximum
Demand (KW)
DG Demand (KW)
Remarks
1 ACPO Building Lighting & Power Load
a) Light Load for (G + 7) 114.06 0.80 91.24 91.24
b) Power Load for (G + 7) 372.70 0.50 186.35 186.35
c) Equipment Load (G + 7) 144.00 0.50 72.00 72.00
2 Lifts
a) Lifts (4nos. @15 KW each)
60.00 0.90 54.00 54.00
b) Lifts (1no. @10 KW each) 10.00 1.00 10.00 0.00 Considering Lift on Normal Supply
3 Fire Fighting System Load 221.00 Only Jockey Pump considered
12.00 12.00
4 Water Pumps including Treatment
45.00 0.70 31.50 31.50
5 Sump Pump 16.00 0.6 9.60 4.80
6 STP 20.00 0.50 10.00 0.00
7 External Area Lighting (Roads, Parking, Green Area etc.)
20.00 0.50 10.00 10.00
8 UPS Load
8.1 For Control Rooms 253.00 1.00 253.00 253.00
8.2 For Other Areas of Buildings
172.38 0.90 155.14 155.14
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|MEP DESIGN BASIS REPORT 31
ANNEXURE-1
SUMMARY OF ELECTRICAL LOADS FOR ACPO G + 7
S. No.
Description Connected Load (KW)
Demand Factor
Maximum
Demand (KW)
DG Demand (KW)
Remarks
9 HVAC Loads
a) AC Load 671.24 0.80 536.99 134.20 Considering Control Room Plug Fan with VFD & Briefing Debriefing Room
b) PAC Server Load 105.00 1.00 PAC Load for Server
c) Mechanical Ventilation Normal case
170.40 0.90 153.36 153.36
d) Mechanical Ventilation Pressurization/ fire case
202.30 0.00 0.00 0.00
Total 2597.07 1585.19 1157.59
Transformer Capacity
Maximum demand load (kW) 1585.19
Considering overall diversity factor 0.9, Maximum demand load (kW)
1426.67
Considering 0.9 PF, Maximum demand load (kVA)
1585.19
Adopting Transformer loading @ 85%, Maximum demand load (kVA)
1864.92
Transformer Selected 11KV/.415KV indoor dry type, 2nos. of 1000kVA
DG Capacity
Maximum demand load (kW) 1157.59
Considering overall diversity factor 0.9, Maximum demand load (kW)
983.95
Considering 0.8 PF, Maximum demand load (kVA)
1229.94
Adopting DG loading @ 85%, Maximum demand load (kVA)
1446.99
1no. of 1000 kVA + 1no. of 500kVA DG Selected
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|MEP DESIGN BASIS REPORT 32
7.2 HT SUPPLY & HT SUBSTATION:-
It is proposed to have 11kV 3-phase supply made available for the said complex at one
point and further will be distributed in the building with the help of distribution step-down
transformer/s by 2nos. dry type transformer voltage level (11kV/ 415V) located in the
basement area.
One no. 11kV switchboard will be installed near entry to receive the power supply from
outside and another HT panel board will be located in basement area with 1no. incoming
feeder and will include 3nos. outgoing feeder with draw out type VCB arrangement that
will fed further to Transformer/s & with spare feeder.
7.3 LT POWER DISTRIBUTION & DG BACKUP:-
Considering the normal and essential load, Main distribution board/s will be provided to
feed the supply for complete loads with automatic operation system.
Either of the transformer/s will feed the supply to any of the loads in case of failure of one
transformer or in maintenance etc.
DG’s backup supply will feed the essential loads e.g. Control room equipments/ AC’s,
Fire pumps, Water supply pumps, Server room equipments/ AC’s, External lighting &
Emergency lighting in the building also, Lifts etc.
With the above strategy, for further power distribution, the following distribution boards
are envisaged for complete buildings:
Main Distribution Board/s
Floor Panels – (At each floor)
Water Pump Panel (WPP)
Fire Pump Panels (FPP)
HVAC Panel/s
Ventilation Panel-1
Ventilation Panel-2
Sump Pump Panel/s
Lighting Distribution Boards
Small Power Distribution Boards
UPS Distribution Boards
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|MEP DESIGN BASIS REPORT 33
7.4 POWER FACTOR IMPROVEMENT & HARMONIC FILTER
Besides the requirement of State Electricity Authority, improving the power factor has
added advantages that it reduces the overall demand on to the Supply Authority thereby
adding to overall economy. Thus, for power factor improvement suitable sized capacitor
panels in the Bank formation shall be provided. The capacitor bank shall be connected to
the Main LT bus and will be located along with the LT panel. Automatic power factor
correction relay of reputed make shall be provided to improve the power factor of the
system and switch on the capacitor depending on the system requirement. The power
factor shall be maintained around 0.95. Necessary online detuned harmonics filters shall
also be provided in the capacitor banks.
7.5 CABLE SIZING & VOLTAGE DROP CALCULATION
All cables shall confirm to will be sizes in accordance with IS 7098 for XLPE & IS-1554
for PVC and other relevant standards.
All cable will be selected based on current carrying capacity, length of the cable, method
of laying, de-rating factors and system fault current etc.
Permissible voltage drop at final circuit will not exceed 5% of the system voltage.
The percentage voltage drop in each circuit will considered on case by case basis and
will vary depending on length of each sub-mains and length of final circuits.
Copper conductor Cables up to 10sq.mm shall be considered and above shall be
aluminium conductors. 16sq.mm cable can be aluminium also as per the site/ equipment
selection/ requirement.
4core cables shall be used up to 35sq.mm size and 3.5 core cables shall be provided for
all above sizes.
Suitable half size neutral cables will be provided for the power cables connecting
Auxiliary transformer to LT Panel and to Sub-main LV DB. XLPE resistant cables will be
used for fire safety purpose and will comply with the performance requirement of IS 7098
category.
7.6 INTERNAL ELECTRIFICATION:-
MS/ PVC conduit shall be used for embedded wiring system and MS conduit shall be
used for surface.
For Fire alarm system MS Conduit shall only be used as a statutory requirement.
The wiring in all the areas shall be provided with FRLS PVC insulated copper wiring in
recessed PVC / surface MS Conduits. The wiring installation shall confirm to IS: 732-
1963 latest addition. The wiring for lights and small power outlets shall be with PVC
insulated FRLS copper conductor wires of 1.5 Sq.mm size and power wiring shall be
carried out with 4.0/ 6.0 Sq.mm. copper conductor wires. Colour coding shall be strictly
maintained for the entire wiring installation i.e. Red, Yellow, Blue for the phases & Black
only for the Neutral and Green only for earth.
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|MEP DESIGN BASIS REPORT 34
Factory made PPI (Per Phase Isolation) MCB Distribution Boards shall be provided at
Load Centre as per area requirement. The Distribution Boards shall be connected
through Sub-mains of Copper wires/ cables in concealed PVC /surface MS conduits/
cable trays. It is proposed to use residual current circuit breaker (RCCB) in the PPI DBs.
7.7 LIGHTING:-
Lighting for common areas for office will be designed based on interiors requirement
preference would be given to energy saving fixtures lamp LED/ T5 fixtures etc.
7.8 UPS SYSTEM:-
To avoid total darkness during changeover time between Grid Power and DG power,
UPS with battery backup is proposed which shall be connected to selected light fixtures
in the various areas of building such as workstation power points and UPS lighting.
ACPO Block Wise Inventory Sheet for Workstation
For Sockets of Work Stations
S. No.
Block
- B1(A)
Block -
B1(B)
Block - B1(C)
Block - B1(D)
Block - B2
Block - B3
Remarks
1 Ground Floor 4 19 19 14 9
2 First Floor 32 32 32 88 7 34
3 Second Floor 0 0 0 0 32 0
4 Third Floor 0 0 0 0 60 0
5 Fourth Floor 0 0 0 0 76 0
6 Fifth Floor 0 0 0 0 53 0
7 Sixth Floor 0 0 0 0 81 0
8 Seventh Floor 0 0 0 0 18 0
Total No. of Workstations Block wise
36 51 51 102 336 34
Considering Power Consumption of 200 Watts @ Each Workstation
7200 10200 10200 20400 67200 6800
Total UPS Power Requirement for Sockets at Workstation other than Control Room (in kW)
122.00
9 Server Load 1 40.00
Assumed
10 Security systems
1
10.00 0.90 9.00 9.00
Assumed
11 Emergency Lighting Load @ 20% of total lighting load
1
114.06 0.90 20.53 20.53 As per Area
wise LP sheet @ 20 % of
total
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|MEP DESIGN BASIS REPORT 35
ACPO Block Wise Inventory Sheet for Workstation
For Sockets of Work Stations
S. No.
Block
- B1(A)
Block -
B1(B)
Block - B1(C)
Block - B1(D)
Block - B2
Block - B3
Remarks
Lighting load
Total Load Demand
KW 191.53
UPS
Adopting over all demand factor 0.9, Maximum Demand in KW
172.38
Maximum Load Demand
Adopting UPS loading @ 90% & PF @ 0.9 UPS capacity required =
KVA 212.81
UPS Selected 3nos. X 100KVA on line redundancy mode with 30minutes backup
For Sockets of Work Stations of Control Rooms
S. No.
Block
- B1(A)
Block -
B1(B)
Block -
B1(C)
Block - B1(D)
Block - B2
Block - B3
Ground Floor (Main control room) 97
1
Considering Power Consumption of 100 Watts for each 4 Nos. Socket @ Each Workstation for 4 monitors mounted on the table
0 0 0 0 0 38.8
2 Server Load for Control Room
To be Confirmed by Client
100
3 PAC for Server 105
4 Unforeseen Load 10
Total UPS Power Requirement for Sockets at Workstation Control Room (in kW)
253.8
UPS
Adopting overall demand factor 100%, Maximum Demand in KW
253.8
Maximum Demand Load
Adopting UPS loading @ 90% & PF @ 0.9 UPS capacity required =
KVA 313.33
UPS Selected 4nos. X 100KVA on line redundancy mode with 30minutes backup
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|MEP DESIGN BASIS REPORT 36
As per the load calculations above, UPS are being considering seven number UPS of
100 kVA each with three phase input & three phase output. These UPS will work on
redundancy mode.
Dedicated UPS shall be provided as per the server load requirement after confirmation of
the client’s requirement/ IT consultant.
7.9 LIFTS
The lift load will be connected to Emergency supply with provision for having DG backup
supply. The load and feeder requirement of lifts will be coordinated during detail design
stage and the same will be incorporated in electrical design.
7.10 CABLE TRAY AND CABLE TRAY ROUTES
Cable tray system will be provided for all electrical services. The system will allow for an
additional 30% spare capacity.
All the primary cable tray distribution routes will be earthed according to the
manufacturer’s requirements and in accordance with IS codes.
Ladder type cable trays shall be provided for heavy duty electrical cables as well as
perforated also or small size of cables but perforated type cable trays only for LV system
shall be provided.
7.11 EARTHING & LIGHTNING PROTECTION
7.11.1 EARTHING:
CHEMICAL EARTHING
It is proposed to provide electrolytic, chemical earthing system. This type of earthing
system has:
Low electrical resistance to earth.
Good Corrosion resistance.
Ability to carry high currents repeatedly.
Reliable long life system.
Low Maintenance.
Main earth electrode will be suitable to achieve a maximum resistance to earth of 1 Ohm.
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|MEP DESIGN BASIS REPORT 37
Proper Grounding will be provided for
Normal AC supply
All apparatus and metal pieces
Steel Structures
Mechanical plant and pipe work
Separate systems of earthing shall be provided for:
UPS
Telephone / EPABX
Servers and computer equipment
AV Systems
Separate earthing shall be provided for the earthing of Panels, and earthing of
Data/Telephone System.
7.11.2 LIGHTENING PROTECTION
Since this is special type of building & later on various radio towers will be installed for
communication etc.
We recommend installing ADVANCE LIGHTENING PROTECTION early streamer type to
take care the maximum/ highest point of communication tower devices etc.
7.12 EXTERNAL AREA LIGHTING
External Area of the whole campus is proposed by using Octagonal GI poles and LED
luminaries as per requirements. The wattage of lighting will be decided during detail
design stage to maintain the minimum lux level requirements of 20 to 30 as per IS 1944.
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8 INTELLIGENT ADDRESSABLE TYPE FIRE ALARM SYSTEM
TYPICAL INTELLIGENT ADDRESSABLE FIRE
ALARM SYSTEM
The main emphasis of fire detection system shall be on having the timely warning in case of any
fire.
It is proposed to provide an automatic intelligent analogue addressable fire alarm system for the
building. All the areas of the building will be provided with the smoke/ heat detection system
employing various types of detectors. Response Indicators, Manual call stations, repeater
Panels and Main Fire Control panel shall be provided at appropriate places.
The fire detection system shall include the following:-
Photo-Thermal Detectors – Photo-thermal type multi-sensor detectors will be installed in
all the corridors, lobbies, rooms, basements and kitchens etc.
Air Sampling Detectors – These detectors will be used in the air handling units in the
return air ducts to analyze the air coming from the conditioned space for any smoke.
Infra-red beam type detectors – These detectors will be used in the atrium/s if any. These
are used for the reason that the heights in the auditorium are high and the use of these
detectors reduces the number of detectors to be installed considerably.
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Aspiration Detectors: Special areas like control room etc.:
As a solution, aspiration detectors are proposed to be installed in these areas. These
detectors consist of perforated pipes from which air is sucked to the laser based main
detection unit located at any convenient location outside the actual protected area. The
coverage area of each unit can be as high as 1000-2000 sqm and the piping length can
be as high as 100-200 m.
Response Indicators – Response indicators will be used outside all rooms with full height
partitions and for the detectors in the false ceiling, if any.
Manual call boxes of brake glass type are proposed to be installed near all staircases
and also in the electrical and mechanical services areas.
Main Control Panels – Automatic analogue addressable type of Fire alarm control panel
is proposed to be installed in the security/ fire control room. Repeater panels will be
provided in the security office and security post outside the building. With this type of a
panel it will be possible to pin point the exact location of fire. The panel will also be able
to dial out to predetermined telephone numbers in case of any alarm.
Public Address and talk balk system – An integral public address and talk back facility
will be provided with the fire alarm system. The loudspeakers of the public address
system will be located in common areas, and on each floor in such a way that any
message announced cover the loudspeakers is clearly audible in all parts of the building.
Also in case of fire, the fire fighting personnel will be able to send back messages by
plugging their fireman’s telephone handsets over the fireman’s telephone jacks which will
be provided in this system. The microphone, amplifiers and control switches for the public
address system will be installed in the fire control room for the building.
9 DATA / VOICE CABLING
Data information/ voice cabling shall be done in the entire premises. MS Conduit and
terminal boxes with covers and RJ-45 outlets shall be provided. The entire network shall
originate from a central server room at the first floor. Data/ voice outlet socket points will
be provided for all Computer Terminals etc. upto the LV shaft/ termination point.
Server, Hubs, Switches, modules & any hardware/ software/ design for the server
room etc. shall be provided by the IT consultant/ system provider.
10 CLOSED CIRCUIT TELEVISION SYSTEM
The Electronic Security and Surveillance will be an integrated security management
system, which shall include various sub-systems. All controls and monitoring of the
security and surveillance system shall be done from the Security Control room which shall
be provided with facility of random monitoring of the complete system with help of LCD
interactive keyboard with alphanumeric text display for camera selection.
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Closed Circuit Television System is intended for comprehensive round the clock
surveillance of the Office Complex, Parking area and service areas of complex from
Security Control room.
The CCTV system shall be suited to the surveillance requirements and shall provide
performance through highly reliable equipment. The system shall provide clear and sharp
picture on TV monitor in all lighting conditions at any time of the day or night with
minimum illumination level.
All TV cameras shall be linked to TV monitors in the security control room through
programmable video distribution / switching units, which shall enable operator to switch
on any of the camera on any TV monitor. Pictures from various cameras locations shall
be displayed on TV monitor in a programmed sequence and in short selectable time
intervals with facility of automatic / manual selection, continuous recording of all cameras
shall be possible with the real time digital recorder for recording the event.
Facility shall be provided for multi view display on TV monitor. It shall also be possible to
have free enlarged view and freezing of the picture on TV monitor from any camera and
also its video recording, as required.
Video recording facility integrated into the system through time lapse real time digital
video recorder fitted with a time / date generators, identifying each frame recorded on the
tape with date and time. This shall enable knowing at a later date the exact moment of
the event occurrence and identification of the area / zone.
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PART – 3 - PLUMBING /SANITARY / WATER & WASTE WATER TREATMENT
1 GENERAL
The following systems will be provided as part of the plumbing:-
Domestic cold water
Sanitary drainage
Irrigation
Sewer Treatment Plant
Water treatment Plant
Car park drainage
2 Standards & Regulations
Plumbing/Sanitary systems will be designed and installed in accordance with the following codes
and standards:
Regulations of the local authority.
National Building Code (NBC) 2005
Manual on water supply and treatments published by Central Public Health and Environment
Engineering Organization under Ministry of Urban Development, Govt. of India.
Manual on sewerage and sewage treatment published by Central Public Health and
Environment Engineering Organization under Ministry of Urban Development, Govt. of India.
SP-35 (Handbook on Water Supply & Drainage System)
CPWD specification and guidelines
A potable water specification IS: 10500-1993.
IGBC ( NC-2011) Lead Rating System
Good Engineering Practice.
3 SOURCE OF WATER SUPPLY:
Bore well/Tube well (2 Nos.)
City Water Supply
Recycled Water from Proposed Sewage Treatment Plant for Flushing / Irrigation system.
Provisions of tanker fill point in case of emergency.
3.1 WATER SUPPLY SYSTEM:
Water is an increasingly scarce and precious resource not only within the India, but around
the world. Reasons contributing to this included rising demand, water pollution and global
climate change. The design will address the pressing need to conserve and manage water
to deliver a water efficient solution. Water efficiency measures include reduction in losses,
reduction in overall water use, and reuse and conservation measures.
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The water supply from City Water Supply (Municipal Main), Bore wells (with permission from
central ground water board(CGWB) and other concerned authority) & Truck fill point shall be
brought to underground fire storage tank and overflow from fire storage tank shall be taken
to raw water storage tank in order to replenish the fire storage water.
The water from raw water storage tank shall be pumped through dual media pressure sand
filter & activated carbon filter and shall be taken to the underground Domestic water tank
(Assuming the Municipal water are of potable quality).
Domestic water (Non – Flushing) from Domestic Water Storage Tank shall be pumped
through 2 Nos. (1W+1S) Domestic Water Lifting Pump to overhead fire water storage tank.
Overflow from overhead Fire Water Storage shall be taken into Domestic Water Storage
Tank.
Domestic water (Non-Flushing) from overhead domestic water tank shall be supplied
/distributed to all toilet & pantry area through gravity system (except top three floor).
Domestic water (Non – Flushing) from Overhead Domestic Water Storage Tank shall be
pumped through Hydro pneumatic System/Booster to all toilets, Pantry Area [For Top Three
Floor].
Water from Flushing Water Storage Tank from STP Plant Room shall be pumped through
Flushing Water Lifting Pumps to Overhead Flushing Water Storage Tank at Terrace where
Flushing Water shall be distributed through gravity system to all WC & urinals.
Water from Soft Water Storage Tank from WTP Plant Room shall be pumped through Soft
Water Lifting Pumps to Overhead Soft Water Storage Tank at Terrace where Soft Water
shall be distributed through gravity system to D.G. set cooling towers.
The Domestic Water Supply to each drinking water cooler shall be provided through water
purifier unit.
3.2 WATER TREATMENT:
The following water filtration & bacteriological treatment is proposed to handle parameters in
accordance to that for potable domestic water supply.
i. Filtration Pressurized through dual media pressure sand
filters/Activated carbon filter.
ii. Bacteriological treatment by Chlorination/UV treatment.
iii. Softening Process: For D.G. set cooling tower makeup.
Final treatment process will only be decided when test report for bore well water sample is
taken.
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3.3 SANITARY DRAINAGE
3.3.1 3-PIPE SYSTEM
In general the drainage system shall be 3 pipe stack system (soil, waste and vent) gravity
type. Out flow from the buildings and facilities will be directed to the basement ceiling
further will be directed to the sewer treatment plant through a series of manholes. Stack
offsets will be avoided wherever possible.
3.3.2 VENT TERMINATION
As per American Society of Plumbing Engineers (ASPE), vents shall terminate 3 m from
intake louvers, Doors, windows and other roof openings.
3.3.3 STORM WATER DRAINAGE
The storm water from the building will be dropped through gravity system to the basement
ceiling and will be connected to the nearby harvesting pit .The overflow will be further
discharged to the municipal line through series of manhole or drain channel.
3.4 ANNEXURES FOR PLUMBING AND SANITARY WORKS:
Sr. No. Description Annexure No.
1 Water Requirement Summary Annexure – I
2 Water Requirement Detail Annexure – I(a)
3 Capacity of Underground & Overhead Water
Storage Tank
Annexure – II
4 Design basis / calculation for selection of tube
well / Bore well
Annexure – III
5 Storm Water Drainage & Rain Water Harvesting
Pit Calculation
Annexure – IV
6 Catchment Area Detail Annexure – IV (a)
7 Solar Water Heating System for Pre Heating Annexure – V
8 Make up soft water requirement for air
conditioning
Annexure – VI
3.5 HOT WATER SYSTEM:
Hot water for domestic use in kitchen/Pantry shall be provided through Electric Water
Heaters (Geysers).
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3.5.1 SOLAR COLLECTION
Sunshine is free and exhaustible in the Gujarat therefore we are looking at using hot
water solar Collectors on this project. It is estimated that for every 2m2 of solar collector
we can produce 1250 litres of hot water. The units are fairly light and robust at 52kg per
unit. The structural engineer and architect need to establish if this can be accommodated
on the roof. These systems have high life expectancy. The hot water is stored in the
collectors and supplied when needed. Back up electric heater may be required to ensure
a consistent water supply. Domestic hot water supply pipe work will be distributed to the
kitchen/ Pantry. The heaters will be fed from the cold water supply.
Solar water heating system shall be provided for pre-heating 20% of the heating
requirement shall be met from solar heat.
The solar water heating system shall comprising of following components:-
a) Solar collector
b) Plate heat exchanger
c) Hot water primary pump
d) Hot Water secondary pump
e) Piping, valve & Accessories
3.6 CAR PARK DRAINAGE
The proposed basement shall be catering to the Parking requirements for the project, and the
services areas such as Plumbing & Fire Fighting Plant Room, Electrical Rooms etc. shall also be
coming in the basement. Provision for drainage is also to be made in case of operation of
Sprinkler System. Therefore it is necessary to do the proper planning of drainage of the
basements, to cater to the following circumstances:
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Channels shall be provided at the starting & ending point of all ramps into the basement.
The basement shall be provided with a network of drain channels.
The drain channels shall be discharging into drainage sumps. The sump shall be equipped
with fixed type submersible drainage pumps, which shall automatically operate based on a
level indicator and controller system. The sump pumps shall discharge the drain water
outside the building into the external storm water drainage system
Any wet areas such as toilets shall be provided with a sewerage sump with automatic
submersible sewage sump pumps.
3.7 SEWERAGE:
Drainage system for soil & waste is based on the most efficient, functional design, minimum
maintenance after installation and available side topography to minimize the excavation work
in laying the pipes; two pipe systems (soil and waste) is proposed to carry soil and waste
separately from the building under gravity.
Waste pipes are connected to sewerage manhole through gully trap and soil pipes are to be
directly connected to the sewerage manhole.
The main sewage is carried through a battery of manholes and finally discharged into
Sewage Treatment Plant (STP).
■ BASIS OF DESIGN FOR SEWERAGE:
It has been considered that 80% of the domestic water supply (Non Flushing) & 100% of
Flushing Water demand shall find its way into the Proposed Sewage Treatment Plant.
The sewer lines have been designed for peak demand (three times Av. Dry Weather Flow in
relation to the water supply demand).
All the sewer line has been designed to run half full.
Necessary provisions for laying S.W. / R.C.C sewer lines and manholes etc. have been
made in the scheme.
Grease trap for kitchens/pantry is also provided before kitchen waste is discharged into
Sewage.
3.8 SEWAGE TREATMENT PLANT (60 M3 /DAY):
Sewage Treatment Plant of 60 m3/day Moving bed bio reactor (MBBR) for office shall be
provided.
In order to conserve water, Sewage Treatment Plant has been designed to ensure that treated
effluent (water) characteristics are well below the permissible limits of local/national pollution
control norms even under varying flow conditions which are typical for such systems. This
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implies that the selected process shall be able to withstand the shock load situation.
We propose to use Moving bed bioreactor working on the principles of attached growth process
after some pre-treatment operation. This has the following advantages:
a) The process has long retention time and can absorb shock load situation.
b) The process produces a well-oxidized sludge in small quantities only, which can be removed
and used as manure.
The sewage treatment plant has been designed with a capacity to handle 60 m3/day for office
building of soil waste including Pantry waste. Entire sewage treatment plant is underground &
consists of Equalization and collection sump with horizontal centrifugal pumps, bioreactors
tanks, Tube setting tank, sludge holding tank and Treated Effluent tank, filter feed pumps,
drainage pump for plant room drainage, Dual Media filter, activated carbon filter,
S.S/MS/GI/HDPE pipe and fitting, valves and associated electrical works.
The STP unit shall be aerobic system based for better efficiency and space conservation. The
basic design parameters of the STP are as follows:
a) Effluent
pH : 6.5 - 8.5
Suspended Solids : 250 - 350 Mg/l
BOD5 : 250 - 300 mg/l
COD : 350 - 450 mg/L
Oil & Grease : 20 - 40 mg/L
b) Treated Effluent
pH : 6.5 - 7.5
BOD5 : Less than 30 mg/l
S. Solids : less than 50 mg/l
COD : Less than 150 mg/l
Oil and Grease : Less than 10 mg/l
The Waste Water Treatment System will be treated using a Moving bed bio reactor (MBBR)
consisting of following system:-
Component – I [Pre Treatment]
Screen Chambers.
Oil & Grease Removal Chamber
Collection cum Equalization Tank
Non-clog type submersible sewage transfer pumps (If required)
Waste water transfer pump (Bypass Pump) from Equalization tank to municipal
sewer in case of Maintenance of STP (If required)
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Component – II [Secondary / MBBR Treatment]:
MBBR Tanks
Clarifier ( Secondary Tube Settler)
Clear Water Tank (Chlorine contact cum Filter Feed Tank)
Aerobic Sludge Holding Tank
Sludge Recirculation Pumps
Dosing Pump
Filter Press Feed Pump
Filter Press
Component – III [Tertiary Treatment]:
Water Softener and brine tank
Irrigation Water Storage Tank
Flushing Water Storage Tank
Flushing water lifting pump
Irrigation water distribution pump
3.8.1 PROCESS DESCRIPTION:
Sewage treatment plant shall be designed to ensure that treated effluent (water)
characteristics are well below the permissible limits, even under varying flow conditions.
This implies that the selected process shall be able to withstand the shock load situation.
It is proposed to use Moving bed bioreactor working on the principles of attached growth
process.
The treatment plant shall be designed with a capacity to handle 60 m3/day for office
building of waste water.
Screens will be provided in screen chambers and it will be manually cleaned by going
down to a platform. Fully submersible centrifugal non clog sewage handling pump will be
provided in the collection cum equalization tank to pump the collected waste water to the
next MBBR tanks. Automatic level controller will be provided in the tank to turn the pump
off at the low water level in the tank and to start the pump when water level is high
automatically. Air will be introduced in this tank to prevent any potential foul smell
problem & to provide the mixing of waste water to avoid the sedimentation of solids in this
tank. Air Grid used for aeration purpose shall be non-clog.
The waste water from equalization tank is pumped to the moving bed bio reactor. There
shall be two nos. of bioreactors in series for the efficient working and removal of BODS
for the required retention time. The process inside the moving bed bioreactors consists of
adding small cylindrical-shaped polyethylene/polypropylene carrier elements in aerated
basins to support biofilm growth. The small cylinders are provided with a cross inside the
cylinder and longitudinal fins on the outside. The biofilm carriers are maintained in the
reactor by the use of a perforated plate with appropriate slot at the tank outlet. Air
agitation or mixers are applied in a manner to continuously circulate the packing. The
packing may fill 25 to 50 percent of the tank volume. Specific surface area of the packing
is about 450-500M2/M3 of bulk packing volume. The waste water from first bioreactor
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flows by gravity through the perforated plate/mesh to the next bioreactor kept in series.
Inside the bioreactors, aerobic bacteria grow in an attached growth from around the
moving plastic media inside the reactors. The bacteria have to reduce BOD & COD of
waste water in the presence of oxygen provided through the air grids located at the
bottom of the reactors. The Process does not require any return activated sludge flow or
backwashing.
From the bio-reactors, the effluent passes by gravity into the clarifier (Tube Settling
Tank). Clarifier will be a hopper bottom sedimentation tank provided with appropriate size
PVC tube deck media. The suspended solids will settle at the bottom of the tank & clear
supernatant will overflow to filter feed tank through outlet launder. The collected sludge at
bottom shall be transferred through pumps to sludge holding tank.
The clear supernatant after clarifier will be collected in to filter feed tank. This tank will act
as housing tank for filter feed pumps. The clarified & dis-infected water will be then fed to
filtration unit.
Filtration unit consisting of Dual Media sand filter, activated carbon filter and ultra-filtration
system will remove the residual impurities such as odour / colour, suspended solids,
BOD/COD. The treated water after the filtration unit will be collected in Irrigation cum
Flushing water storage tank from where it is transferred to flushing water tank at terrace &
Irrigation System.
Excess sludge from the bottom of the settling tank will be removed and transferred to
sludge holding tank. Air grid shall be provided in this tank to avoid conversion into
anaerobic conditions, thickening of sludge and keep sludge in homogenous condition.
The digested & thickened sludge shall be further thickened through Sludge Dewatering
System (Filter press with screw pump) and disposed off periodically through closed
tanker or can be reused as manure.
2 Nos. (1w+1s) Flushing Water transfer pump shall be provided to transfer the Flushing
Water from UG Flushing Storage tank to overhead flushing water storage tank located at
terrace/ mummty of building from where the flushing water supply under gravity shall be
provided to all WC’s & urinals.
2 Nos. (1w + 1s) Irrigation Water Transfer Pumps shall be provided for Irrigation water
supply distribution system for Landscape Area, Planter & Green Area.
UV unit shall be provided after Activated Carbon Filter.
Re-Use & Disposal of Treated Effluent
Considering the site planning and various conditions of the project, the various opting
available for re-use of the treated wastewater from the Sewage Treatment Plant are:
Flushing Purpose
Use for Flushing purpose for Water Closet (WC) and Urinals. The Treated Effluent from
Flushing Water Storage Tank pumped into the Flushing Water overhead water tank
through water lifting pumps and supplied to all WC & Urinals through gravity system.
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Irrigation Purpose
Use Irrigation purposes in the campus for watering the lawn hydrants and planters etc.
The treated effluent from the STP shall be pumped into the Garden Hydrant Ring, which
shall be laid for the entire site.
3.9 STORM WATER DRAINAGE SYSTEM:
Storm water drainage systems will be designed based on a rainfall intensity of 100 mm
per hour for the purpose of designing rain water harvesting pits. 1 No. Rainwater
harvesting pit of size 3m dia x 3.5m effective depth shall be provided. For detail refer
storm water drainage calculation. However, the rainfall intensity of 75 mm per hour shall
be considered for roof rain water drainage.
Storm water drainage system will be provided for the building roof drainage and the site
drainage.
The Storm water will be collected by gravity through catch basin, storm water manhole
and RCC pipe and finally discharge to the Rainwater Harvesting Pit.
Overflow of rainwater harvesting pit shall be discharged to city storm water drain/storm
water sump.
3.10 IRRIGATION SYSTEM:
Irrigable Area
The premises comprises of irrigable area such as planter, lawns etc, hydrant/sprinkler
system is proposed as per Landscape/ plantation design.
Source of Water
The irrigation water shall be made available from treated effluent of sewage treatment
plant (STP).
Distribution System
A network of distribution system is to be designed to supply irrigation water at all locations
where green patches are to be developed. The irrigation water is to be supplied through
pressure lines by pumping.
Water requirement for Landscape, Green Area and various plants shall be confirmed by
Landscape Consultant/Architect.
Pressure requirement/Residual pressure for Irrigation System shall be confirmed by
Landscape Consultant/Architect.
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3.11 MATERIAL OF CONSTRUCTION (MOC) FOR PLUMBING & SANITARY WORKS:
Sr.
No..
Description of Services Material of Construction
(MOC) Proposed
IS Code
[1] Internal drainage (Soil, Waste & Vent. Pipe
& Fitting, Accessories) (Toilet/Kitchen
+Shaft)
UPVC SWR Pipe &
Fittings
IS:13592-2013
[2] Soil & Waste Header running at Basement
Ceiling
CILA Pipe & Fittings IS-1536 and IS-
1538
[3]
Rain Water Disposal System, rain water
down take (Terrace/Shaft up to Catch
Basin)
UPVC Rain Water Pipe
Class III & Fittings
IS 4985
[4] a) Domestic Water Supply System (Plant
Room /Shaft/Terrace)
G.I. Class ‘C’ Pipe & Fitting IS-1239-1982
b) Domestic Water Supply (Internal) CPVC Pipe & Fitting
[5] a) Flushing Water Supply System
(Plant Room /Shaft/Terrace)
G.I. Class ‘C’ Pipe & Fitting IS-1239-1982
b) Flushing Water Supply (Internal) CPVC Pipe & Fitting
[6] Domestic /Flushing /Soft Water Riser
(Shaft)
GI Class ‘C’ Pipe & Fittings IS-1239-1982
[7] Domestic Water/Flushing Water/Soft
Water/Irrigation Water/Header Running in
Basement (From WTP/STP Plant Room to
Riser)
GI Class ‘C’ Pipe & Fittings IS-1239-1982
[8] Overflow/Drain/Vent Pipe for OHT/UGT
(Terrace + Basement)
GI Class ‘C’ Pipe & Fittings IS-1239-1982
[9] Water Supply External
(From Tube well / Municipal Water Supply
to UG Tanks)
CI LA Pipe & Fittings IS-1536 and IS-
1538
[10] Garden Hydrant System
(External)
UPVC Pipe & Fittings IS-4985-2000
[11] Drainage Sump Pump discharge Pipe &
Header (Basement)
GI Class ‘C’ Pipe & Fittings IS-1239-1982
[12] Sewage Sump Pump Discharge Pipe &
Fitting (Basement)
GI Class ‘C’ Pipe & Fittings IS-1239-1982
[13] External Sewerage System Stoneware Pipe & Fitting IS:4127-1983
[14] External Storm Water Drainage System RCC Pipe & Fitting IS:458
[15] Basement Drain Pipe CI Pipe & Fittings IS-3989-1984
[16] Bypass Pipe from STP to Municipal Sewer
(during the maintenance of STP)
CI LA Pipe & Fittings IS-1536 and IS-
1538
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ANNEXURE – I
WATER REQUIREMENT SUMMARY
Sr.
No. Description
Water Consumption
(LPD)
1 Domestic Water Requirement (Annexure – I(a)) 38,940 LPD
2 Flushing Water Requirement (Annexure – I(a)) 18,780 LPD
3 Irrigation Water Requirement (Annexure – I(a)) 56,700 LPD
4 Soft Water Requirement (Annexure – VI )
40,000 LPD
5 Filter Back Wash Water Requirement 6,909 LPD
6 Water Bodies Water Requirement (L.S) 3976 LPD
Total Water Requirement 1,85,305 LPD
Total Water Requirement (Say)
1,85,000 LPD
185.00 KLD
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ANNEXURE – I (a)
WATER CONSUMPTION DETAIL
WATER REQUIREMENT SHEET
Sr.
No
.
Description
Water
consumpt
ion per
unit
(LPCD)
No. of
Occupants
Domestic
Water
Requireme
nt (LPCD)
Flushing
Water
Requireme
nt (LPCD)
Total Water
Consumption
LPD
1 Ground Floor
a) Staff 45 191 5730 2865 8595
b) Visitors 15 241 0 3615 3615
c) Staff Canteen & Coffee Shop 45 7 210 105 315
d) Canteen and Coffee Shop 70 240 16800 0 16800
2 First Floor
a) Staff 45 208 6240 3120 9360
b) Visitors 15 96 0 1440 1440
3 Second Floor
a) Staff 45 76 2280 1140 3420
b) Visitors 15 5 0 75 75
4 Third Floor
a) Staff 45 20 600 300 900
b) Visitors 15 5 0 75 75
c) Staff of Pantry 45 3 90 45 135
5 Fourth Floor
a) Staff 45 67 2010 1005 3015
b) Visitors 15 45 0 675 675
6 Fifth Floor
a) Staff 45 60 1800 900 2700
b) Visitors 15 37 0 555 555
7 Sixth Floor
a) Staff 45 52 1560 780 2340
b) Visitors 15 28 0 420 420
8 Seventh Floor
a) Staff 45 54 1620 810 2430
b) Visitors 15 57 0 855 855
Total 38,940 18,780 57,720
12 Soft water Requirement for
HVAC Cooling Tower
40,000
13 Water Requirement for Air
Washer
20,000
14 Water bodies (L.S) 3,976
15 Filter back Wash (L.S) 6,909
16 Irrigation @ 4.5 litres per
Sqm. (Assume Green
Area=12600 Sqm.)
56,700
Total Fresh water required before
commissioning of STP
1,85,305
STP Capacity 49,932
Total Fresh water required After
commissioning of STP
1,50,353
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT 53
ANNEXURE – II
UNDERGROUND & OVERHEAD WATER STORAGE TANK
Sr.
No. Description of Tanks
No of
Tanks
Capacity
(m³)
Total Capacity
(m³)
UNDERGROUND WATER STORAGE TANK :-
1 Fire Water Tank 2 Nos. 100 M3 200 M3
2 Raw Water Tank 2 Nos. 75 M3 150 M3
3 Domestic Water Tank 2 Nos. 45 M3 90 M3
4 Soft Water Tank 2 Nos. 45 M3 90 M3
OVERHEAD WATER STORAGE TANK :-
1 Fire Water Tank 1 No. 20 M3 20 M3
2 Domestic Water Tank 1 No. 15 M3 15 M3
3 Soft Water Tank 1 Nos. 10 M3 10 M3
4 Flushing Water Tank 1 No. 10 M3 10 M3
Notes:-
1. It is proposed to provide R.C.C underground tanks for a capacity equivalent to one day
water requirements for domestic purpose.
2. Capacity of fire tanks shall be as per NBC part IV.
a. The storage capacity of overhead water tanks is 1/3 full day of total daily water
requirement.
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT 54
ANNEXURE-III
DESIGN BASIS / CALCULATION FOR SELECTION OF TUBE WELL / BOREWELL
Tube well/ Bore well:-
Total daily fresh water requirement = 185000 liter / day
= 185 KLPD
Assuming on Average yield of Tube well = 15000 liter / hour
Considering pumping hour = 8 hours
No. of Tube Well Required = Daily Water Requirement
Pumping Hour x Discharge of Tube Well
= 185000 liters/day
8 hr x 15000 liter/hour
No. of Tube Well Required = 1.54 Nos
Add 10% as Standby = 0.154 No.
Total Nos. of Tube well required = 1.69 Nos.
Say = 2 Nos.
Total No. of Tube well provided = 2 Nos.
It is proposed to provide 2 Nos. Tube wells to meet the entire fresh water requirement of project.
AHMEDABAD COMMISSIONNER POLICE OFFICE
|MEP DESIGN BASIS REPORT 55
ANNEXURE-IV
RAIN WATER HARVESTING PIT CALCULATION
DESIGN BASIS FOR STORM WATER DRAINAGE SYSTEM:
RUN – OFF [DISCHARGE]
Q = 10 CIA
Where
Q = run-off (discharge) in cubic meters per hour (m3/hour).
C = Co-efficient /Impermeability factor of the surface.
I = Intensity of rainfall.
=> Taking 80 mm/hour for Ahmedabad.
A = Total Drainage Area in Hectare.
Co-efficient of Runoff/Impermeability Factor [C] :
Sr.No. Description of Surface Value of runoff coefficient /
Impermeability factor of the surface
1. Terraces, Hard paved surface 0.70 - 0.80
2. Paved Surface, Roads 0.60 - 0.70
3. Natural ground, sloping ground 0.20 – 0.50
Conversion Factor
1 Hectare = 10,000 Sq.mt
1 Sq.mt = 1/10,000 Hectare
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 56
ANNEXURE-IV (a)
STROM – WATER RUN OFF (DISCHARGE) CALCULATION
Sr.
No.
Type of
Structure/Surface
Catchment Area
[A]
Run off
Coefficient
[C]
Intensity
of rainfall
(mm/hour)
Discharge
(Run off)
[Q=10 CIA]
m3/hr
Total
(m3/hr)
Discharge
[Q] Sqm. Hectare
[1] Building (Terrace
/Hard Paved Area)
a) Area (A1) 8975 0.8975 0.80 80
10 x 0.80
x 80 x
0.8975
574.4
Say of [1] 8975 0.8975 575
[2] Paved Surface
(Road)
a) Area (P1) 2500 0.2500 0.60 80
10 x 0.60
x 80 x
0.2500
120
Say of [2] 3500 0.3500 120
[3] Green Area (G) 17339 1.7339 0.20 80
10 x 0.20
x 80 x
1.7339
277.4
Say of [3] 17339 1.7339 278
Grand Total (1-3) 28814 2.8814 973 m3/hr
Considering coefficient for Evaporation/ Spillage and first flush etc.
= 0.800
Total Storm Water Flow = 973 X 0.800 M3 /Hour
= 778.4 M3 /Hour
SAY = 780 M3 /Hour
Total Storm Water Flow = 780 M3 /Hour
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 57
VOLUME OF STORM WATER
Total Storm Water Flow = 780 m3/hr
Considering 15 minutes (0.25 Hr) Retention Period.
Volume Required = 780 x 0.25
= 195 m3
Volume (SAY) = 195 m3
Considering Rain Water Harvesting Pit of size 3.0 m dia. and 3.5 m effective depth.
Volume of One No. Rain Water Harvesting Pit
Diameter of Pit (d) = 3.0 m
Liquid Depth [D] = 3.5 m
Volume of 1 No. Rain Water
Harvesting Pit =
= 24.7275
Say = 25 m3
No. of Rain Water Harvesting Pit
Total No. of rain water
Harvesting pit required = Total Volume
Volume of One No. Rain Water Harvesting Pit
= 195
25
= 7.8 Nos.
Say = 8 Nos.
Providing 8 Nos. Rain Water harvesting pits of size 3 m dia. x 3.5 m effective depth
with 160 (OD) UPVC slotted pipe up to a layer where sandy aquifers/permeable
layers exist.
x d2 x D
4
x 9.0 x 3.5
4
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 58
ANNEXURE-V
SOLAR WATER HEATING SYSTEM
[1] Hot Water Requirement
a) Hot Water Requirement for Canteen & Coffee shop Area
b) Domestic Water Requirement for
Kitchen, Food & Beverage = 250 Seat X 70 Liter/Seat/day
= 17,500 liter/day
c) Considering hot water requirement as 35% of Domestic Water Requirement
d) Hot Water Requirement = 0.35 X 17,500 Liter/day
= 6,125 Liter/day
e) Total Hot Water Requirement = 6,125 Liter/day
[2] CAPACITY OF SOLAR WATER HEATING SYSTEM
f) Considering 20% of total hot water requirement for Solar Water Heating System
g) Capacity of Solar Water Heating System = 0.20 X 6,125 Liter/day
= 1225 Liter/day
[3] Estimation of Solar Collector required:
h) Energy content of Hot Water at 35OC Temperature rise
= Total Hot Water generated
= 1225 LPD x 35OC K-cal/day
= 42,875 K-cal/day
i) No. of Solar Collector required = Energy content of Hot Water at 35OC K-cal/day
5000 Kcal/day
= 42,875 5000
= 8.575 Nos. Say = 9 Nos. Solar Panel
Total No. of Solar Panel provided = 9 Nos.
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 59
ANNEXURE – VI
MAKE UP SOFT WATER REQUIREMENT FOR AIR CONDITIONING
AIR CONDITIONING (2Nos. x 200TR):
Total Tonnage = 400 TR
Per TR Circulation Through Cooling Towers = 3 GPM/TR
Total = 400 x 3 GPM
= 1200 GPM
= 1200 x 3.78 LPM
= 4536 LPM LOSSES CONSIDERED:
a) Evaporation Losses = 0.7%
b) Drift Losses = 0.05% as per Cooling Tower Manufacturer
c) Bleed Losses = 0.20 %
Assume Operational working hours for Office Areas of Building:- Office Area – 15 Hours
Hence makeup soft water requirement/consumption @15 hours average Operation per day
= (4536 x 0.7 x 60 x 15) + (4536 x 0.05 x 60 x 15) + (4536 x 0.2 x 60 x 15) 100 100 100
=28,576.8 + 2,041.2 + 8,164.8 = 38782.8 Liters
Say = 40,000 liters Makeup soft water requirement For Air conditioning cooling Towers = 40,000 Liters/day
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 60
WATER BALANCE DIAGRAM BEFORE COMMISSIONING OF STP
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 61
WATER BALANCE DIAGRAM AFTER COMMISSIONING OF STP
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 62
IMPORTANT INDIAN STANDARDS PLUMBING & SANITARY WORK
IS 651-2007 Specification for salt Glazed stoneware pipes and fittings
(First revision). IS 782-1978 Specification for caulking lead. IS 1172-1993 Code of basic requirements for water supply, drainage and
sanitation (revised). IS 1239 (Part-I & II) Specifications for mild steel tube, tubular and other steel pipe
fittings. IS 1537-2001 Specification for vertically cast iron pressure pipes for water,
gas and sewage. IS 1536-1976 Specification for centrifugally Cast (Spun) Iron pressure
pipes for water, gas and sewage. IS 1538 (Part 1 to 23) Specification for Cast Iron fittings for pressure pipes for
water, gas and sewage. IS 1626-1994 AC building pipes, gutters and fittings (Spigot and socket
type). IS 1726-1991 Code for cast iron manhole frame and cover. IS 1729-2002 Specification for Sand cast iron Spigot and Ventilating pipes,
fittings and accessories. IS 1742-1983 Code of practice for building drainage. IS 2064-1993 Code of practice for selection, installation and maintenance
of sanitary appliances. IS 2065-1983 Code of practice for water supply to buildings. IS 3114-1994 Code of practice for laying of C.I. Pipes. IS 3589-2001 Specification for electrically welded steel pipes for water, gas
and sewage. IS 3989-1984 Centrifugally cast spun iron and socket soil and ventilating
pipe, fittings and accessories. IS 4111-1986 Code of practice for Ancillary structure in sewerage system. IS 4127-1983 Code of Practice for laying glazed stone ware pipe. IS 4515 Specification for un plasticized PVC pipe fittings.
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 63
IS 4985-2000 Specification for un plasticized PVC pipes for portable water
supplies. IS 1703-2000 Ball Valves IS 4736-1986 Galvanizing G.I. Pipes IS 780-2000 Cast iron sluice valves IS 2692-1989 Brass ferrule IS 458-2003 R.C.C. pipes National building code for water supply, drainage and sanitation Part IX Plumbing services section 1 & 2. The installation shall also be in conformity with the bye-laws and a requirement of the local authority is so far as these become applicable to the installation. Where ever this specification calls for a higher standard of materials and/or workmanship then those required by any of the above regulations and standards, hen this specification shall take precedence over the said regulations and standards. Wherever drawings and specifications require something that may violate the regulations, the regulation shall govern.
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 64
4 PART 4: FIRE PROTECTION AND SPRINKLER SYSTEM
4.1 DESIGN CRITERIA:
The following standard, bye-law, manual have been followed in designing the Fire
Fighting System:-
a) Relevant IS Codes published by Bureau of Indian Standard.
b) National Building Code 2005 Part 4 for Fire Protection System.
c) IS 15105: 2002 Design and Installation of Fixed Automatic Sprinkler Fire Extinguishing
System– Code of Practice.
The following systems will be provided as part of the Firefighting:
Hydrant System ( External & Internal Hydrant)
Sprinkler system
Special Fire suppression system
Fire Extinguishers
4.2 SALIENT FEATURES OF THE PROJECT
Type of the Buildings -- Business Building (Office)
Max. Height of Building -- Approximate 33.70 meter
Categories as per NBC-2005 -- Group E, Sub Division E-1 (Business Building)
4.3 GENERAL
The following is the description of the fire protection system that will serve the building and
the basement area. The design shall confirm the requirement of NFPA and the local
authority. All hydraulic calculations shall be performed for this building using internationally
Recognized practices, guidelines and the above criteria. The building's fire protection
system will be a water based system. The entire area shall be protected by a combination
of wet sprinkler and standpipe systems and water curtains in the basement. The fire
protection system shall be fed from a combined domestic water and fire protection water
storage tank situated at Basement level. The size of this tank is specified within the public
health water storage section. A separate pump for standpipe and sprinkler system shall be
provided. The fire pump room shall comprise of two electric driven as duty pump, one diesel
engine as standby pump and one jockey pump as pressure maintenance pump as per
NBC. All fire pumps shall be UL Listed and FM approved as per NFPA 20 and is provided
with UL/FM dedicated controllers.
As per NBC-2005, Part-4 Fire and Life Safety, the building comes under Clause 3.1.6
Group E Business Building, Sub division E-1 above 30 mtr in height the Fire Protection as
per Table-23 shall consist of:-
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 65
FIRE PROTECTION PRESSURE REQUIREMENT
Parameter or Strategy Maximum Pressure Source
40 mm hose valves 4.5 bar (65 psi) NFPA
(Residual Pressure)
65 mm landing valves 6.9 bar (100 psi) NFPA
(Residual Pressure)
Sprinkler System 12.1 bar (175 psi) NFPA
Sprinkler and standpipe 24 bar (350 psi) NFPA
System (Working Pressure)
Sr.No. TYPE OF INSTALLATION REQUIREMENT
1. Fire Extinguisher Required
2. Hose Reel Required
3. Dry Riser Not Required
4. Wet Riser (Internal Hydrant System) Required
5. Down Comer Not Required
6. Yard Hydrant (External Hydrant System) Required
7. Automatic Sprinkler System Required
8. Manually Operated Electric Fire Alarm
System Required
9. Automatic Detection & Alarm system Required
10. Underground static water storage tank Required 2, 00,000 lts.
11. Terrace tank Required 20,000 lts
12. Underground Fire Pumps
2 Electric & 1 Diesel Pump of
capacity 2850 LPM, 1 Electric
Water Curtain Pump1620
LPM and 2 jockey pump of
capacity 180 LPM
13. Terrace Pump Not Required
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 66
4.3.1 Basis of Design
The fire suppression system will be hydraulically calculated based on the available water
supply and the requirements of NFPA. Pressure reducing valves will be provided when
pressure exceeds the following thresholds:
Annexures for Fire Protection and Sprinkler System:
Sr.
No. Description Annexure No.
1. Fire Fighting Pump and Equipment Details as per
NBC 2005 Part 4 Annexure-F-1
2. Fire Fighting Pumping Head Calculation Annexure-F-1(A)
3. Friction loss calculation in pipe & Fittings Annexure-F-1(B)
4. Curtain Nozzle pump Flow, Pumping Head
Calculation Annexure-F-2
5.
Detail of suction header, individual suction pipe,
delivery header, individual delivery pipe for
firefighting pumps
Annexure-F-3
4.3.2 SYSTEM DESCRIPTION:
The Fire Fighting System shall consist of Jockey pump, Electrical Driven Fire Hydrant
Pump, Sprinkler Pump and Common Diesel Pump for Sprinkler & Fire hydrant (Internal
& External) System, Air vessel, associated instruments, cabling, piping, valves, control
panel etc. has been provided as per NBC 2005 Part IV requirement. Jockey pump shall
maintain all water lines for Hydrants & Sprinklers fully charged under pressure for full
Automatic operation in case of fire.
4.3.3 YARD HYDRANT & INTERNAL HYDRANT (WET RISERS):
The Yard hydrant shall cover the entire building externally with Hydrant points (yard
hydrant) at appropriate location with hose boxes, hoses etc. These yard Hydrants will be
fed from an external ring. The internal hydrant system comprising of 1 No. Fire Hose
Reel Drum with rubber hose and nozzle, 2 Nos. single outlet landing valves, 4 lengths of
15 m long, 63 mm dia hose with male and female coupling, branch pipe and Fireman’s
Axe.
4.3.4 FIRE WATER SOURCE:
Two Nos. underground RCC water storage tanks each of 100 M3 capacity has been
created in the Basement. A pump house adjacent to the fire storage tank where
various fire water pumps and associated equipment’s would be located & 20M3
overhead tank shall be provided at terrace.
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 67
4.3.5 PRESSURISATION SYSTEM:
This system shall comprise of one Nos. Electric Motor Driven Jockey Pumps,
pressure vessel.
The hydrant / Sprinkler system shall be kept pressurised all the times. The jockey
pump shall start automatically upon getting impulse from pressure switch of the
pressure vessel. The pump shall stop automatically. The jockey pump shall take care
of the leakages in the system, pipe lines, valves etc.
4.3.6 MODE OF OPERATION:
a) In the event of fire, when one or more valves are opened, the water from the jockey
pump will compensate water demand. If the water demand is not able to be met by
above, the relevant pressure fall in the header shall start the AC Motor driven fire
pump through pressure switches, automatically. In case of failure of electricity or
failure of pump to start or the pump not meeting the required water demand, the
standby diesel pump set shall start automatically. However, shutting down of the
pumps shall be manual except for the jockey pump, which shall start & stop
automatically through pressure switches.
b) The setting of the pressure switches shall be adjustable so that any desirable
sequence of starting may be achieved at site.
c) In addition to auto start arrangements, the main pump shall also have an overriding
manual starting facility by push button arrangement in case of an emergency.
4.3.7 FIRE BRIGADE INLET CONNECTIONS:
Fire brigade inlet connection shall be of Stainless Steel with four way 63 mm dia
instantaneous type inlets with leak proof built in type check valves and 150 mm dia
flanged outlet connections feeding to the External Fire ring/Internal Hydrant Header
and underground Fire water storage tank. The collecting head shall conform to IS-
904.
4.3.8 PRESSURE VESSEL:
To compensate for slight losses of pressure in the system and to provide an air
cushion for counteracting pressure surges/water hammer in the pipe work air vessel
conforming to IS: 3844 shall be furnished in the pump room near fire pump. The air
vessel shall normally be half full with water and remaining filled with air, which shall be
under compression when the system is in normal operation.
4.3.9 HAND APPLIANCES:
For incipient fire protection, portable fire extinguishers are distributed in areas in
accordance to NFPA 10 and relevant classifications and ratings.
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 68
Fire extinguishers shall also be provided on electrical and telephone areas at each
floor and trolley mounted CO2 fire extinguisher on Transformer/Substation Room as
required.
All portable fire extinguishers shall be listed.
4.3.10 SPRINKLER SYSTEM:
Automatic sprinklers shall be installed and positioned to fully protect the premises in
accordance with NFPA 13. Fire protection system in each zone is designed to provide
the following hydraulic design criteria
Maximum area of protection of one zone shall be 4,831 sq.m as per NFPA 13. Each sprinkler
zone will be provided with a floor control assembly which consists of main shut off valve, check
valve, tamper switch, flow switch, pressure gauge , flow test valve, sight glass, orifice union and
drain vale. All flow and tamper switch will be connected to the building fire alarm system using
addressable points enabling the system to provide a location of trouble spot. Adjacent to each
sprinkler riser will be main drain riser that will serve as the drain for testing and/or maintenance
of sprinkler system. Sprinklers for light hazard occupancies shall be quick response recessed,
semi-recessed or pendant type and standard response for ordinary hazard occupancies.
SPRINKLER SYSTEM DESIGN CRITERIA
Parameter or Strategy Design Density Area of sprinkler Source
Operation
Light Hazard 4.1 lpm/sq.m 139 sq.m NFPA
Ordinary Group I 6.1 lpm/sq.m 139 sq.m NFPA
Ordinary Group II 8.1 lpm/sq.m 139 sq.m NFPA
Extra Group I 12.2 lpm/sq.m 232 sq.m NFPA
Extra Group II 16.3 lpm/sq.m 232 sq.m NFPA
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 69
Type of sprinkler heads to be used:-
4.3.11 Special Fire Suppression System
Areas such as main telephone and electrical rooms do not require sprinklers. Hence,
special fire suppression systems shall be provided and shall be designed in
accordance with NFPA 13, "Standard for the Installation of Sprinkler System", NFPA
2001 "Standard on Clean Agent Fire Extinguishing System and NFPA 16 "Standard
for The Installation of Foam-Water Sprinkler and Foam-Water Spray System". These
are listed below:
Clean agent suppression for the main telephone and LV rooms.
Foam sprinkler system for generator room.
TYPES OF SPRINKLER HEAD
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 70
4.3.12 MATERIAL OF CONSTRUCTION (MOC) FIRE PROTECTION WORK:
Sr.
No. Description of Services
Material of
Construction
(MOC) Proposed
IS Code
1 Internal / External Fire Hydrant System & Automatic Sprinkler System:
a) Pipe up to 150 mm diameter M S Class ‘C’ IS:1239 (Part I)
b) Pipe above 150 mm diameter M S (6 mm Thick) IS:3589
Fittings :
i) Up to 50 mm diameter Forged Screwed
Fittings
ii) 65 mm diameter & Above any up to 150
mm diameter
Butt Welded IS : 1239
iii) Above 150 mm diameter Mitre fittings from
parent pipe
2 Hydrant Valve/ Landing Valve Stainless Steel IS : 5290 1983
(Type ‘A’)
3 Non Percolating Flexible Hose RRL IS : 636 Type A.
4 Male & Female Instantaneous Type
Coupling
Stainless Steel IS : 903
5 Branch Pipe Nozzle Stainless Steel IS : 903
6 Butterfly Valve CI IS : 13095
7 Swing Check Valve CI IS : 5312 Part –
I
8 Air Release Valve CI
9 Pressure Gauge Stainless Steel
10 Orifice Plates SS 304
11 Installation Control Valve Cast Iron IS-210 Grade
FG200
12 Quartzoid Bulb Type Sprinkler Head Stainless Steel UL/FM
Approved
13 Two Way / Four Way Fire Brigade Inlet
Connection
Stainless Steel IS: 904
14 Fire Brigade Suction Hose Coupling Stainless Steel IS: 904
15 Diesel Pump Exhaust Pipe MS Class ‘C’ IS: 1239
16 Fire Hose Cabinet (FHC) 16 SWG Powder
Coated M S Sheet
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 71
ANNEXURE-F-1
SCHEDULE OF FIRE FIGHTING PUMPS (FIRE PUMP ROOM)
Sr.
No. Description of Pump
Flow
Rate
Pumping
Head Qty.
Motor
KW
Total
Motor
KW
Location
A] FIRE FIGHTING PUMPS LOCATED AT FIRE PUMP ROOM (AT BASEMENT)
1 Electrical Driven Hydrant
Pump [HP]
2850
LPM
85 M 1 No. 80Kw 80 Kw Plant Room
2 Electrical Driven
Sprinkler Pump [SP]
2850
LPM 85 M 1 No. 80 Kw 80 Kw Plant Room
3 Diesel Driven Fire Pump
(DP)
2850
LPM
85 M 1 No. - - Plant Room
4 Electrical Driven Jockey
Pump (JP)
180
LPM 85 M 2 No. 5.5 Kw 11 Kw Plant Room
5 Electrical Driven Curtain
Nozzle Fire Pump (CP)
1620
LPM 25 M 1 No. 14 Kw 14 Kw Plant Room
Total 185 kw
Note:-
Diesel driven fire pump shall be common for hydrant & sprinkler system and work as standby.
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 72
ANNEXURE –F-1 (A)
FIRE FIGHTING PUMPING HEAD CALCULATION FOR FIRE FIGHTING PUMPS:
Height of Building from Ground Level to Terrace Tower = 33.70 m
Height between Basement where Pumps are located and natural Ground Level =4.6 m
Minimum pressure required at last landing valve = 3.5 Kg/Sq.cm = 35 m
Height of last landing valve from Terrace = 1.0 m
Friction losses in pipe & Fitting = 10 m [Refer Annexure –I (B) enclosed]
Pumping Head required = 33.70+4.6+35+1+ 10 = 84.3 M
Say = 85 M
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 73
ANNEXURE – F-1 (B)
FRICTION LOSSES IN PIPE & FITTING CALCULATION (HYDRANT& SPRINKLER
SYSTEM)
Size/dia. of main Hydrant & Sprinkler pipe size. = 150mm dia.
Flow Rate of Fire Fighting pump = 2850 LPM
Total Horizontal & Vertical length of Hydrant & Sprinkler pipe from fire pump room at basement to 7th Floor level = 33.70+ 4.6 +140 m =178.3 m ---------[a]
Equivalent length of Fitting & Accessories as 10% of [a] = 0.10 x 178.3 m =17.8m------------ [b] = 17.1m
a) Total Length of 150 mm dia. pipe = 178.3 + 17.8 m = 196.1 m SAY = 200 m b) Friction Pressure losses in pipe & fitting as per Hazen-William formula.
Where
P =Loss of pressure per meter Length of pipe (Bar)
Q =Flow rate through the pipe in (LPM) = 2850 LPM
d =mean bore of pipe (in mm) = 150 mm
C =A constant for the type and condition of pipe = Considered 120 mm for Mild Steel L=Equivalent length of Pipe &Fitting in (m) = 1m
Putting the values in above formula P = 6.05 x 105_x 1x (2850)1.85
(120)1.85 x (150) 4.87
= 605000 x 1x 2462991.942 7022.395 x 3.95 x 1010 = 0.005372 bar
Loss of pressure for 200 m length P = 0.005372 X 200m = 1.074 bar = 1.0 bar
P= 6.05 x 105x L x Q1.85 C1.85 x d4.87
Friction Pressure Losses in pipe & fitting calculated = 1.07 bar = 10 m
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 74
ANNEXURE-F-2
CURTAIN NOZZLE PUMP FLOW, PUMPING HEAD CALCULATION
Total Length of Pipe Network = 110 m
Spacing between Open Nozzles = 2.0 m C/C [Nozzle Manufacturer recommends 2.0 m for better performance]
Nos. of Open Nozzles = 110 2.0
= 54 Nos.
Say = 54 Nos.
The flow through each nozzle is calculated by formula.
Qm = Km x Pm where Qm = Flow in lpm flowing through nozzle Km = Nozzle Factor = 23 P = Total Pressure in Bar at flow Q = 1.4 bar
Qm = 23 x 1.4 = 27.21 lpm
Total Flow rate required = 54 Nos. Nozzle x 27.21 lpm Flow on each nozzle.
= 1469 lpm
Say = 1620 lpm
Water curtain Pump capacity required = 1620 LPM = 97.2 m3/hour
Provided = 1620 LPM = 97.2 m3/hour
Capacity of Water Curtain System Pump = 97.2 m3/hour = 1620 LPM
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 75
PUMPING HEAD CALCULATION
Basement Height where curtain nozzle Pump to be installed (Static Head) = 4.6 M-----------------------(a)
Residential/Minimum pressure at farthest spray nozzle = 1.4 bar
= 14 m -------------------------- (b)
Friction Losses in Pipe & Fittings = 5.0 m -------------------------(c)
Pumping Head required = (a) + (b) + (c)
= 4.6 + 14 m + 5.0 m
= 23.6 m SAY = 25 m
SUMMARY
Flow rate/capacity of Electrical Driven Fire Pump = 1620 LPM
Pumping Head Provided = 25 m
Q Quantity of Pump = 1 No.
Pumping Head Provided = 25 m
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ANNEXURE-F-3
DETAIL OF SUCTION HEADER, INDIVIDUAL SUCTION PIPE, DELIVERY HEADER,
INDIVIDUAL DELIVERY PIPE FOR FIRE FIGHTING PUMPS
Sr.No. Description Size/Dia Qty
1. Suction Header (Common for Hydrant/Sprinkler, Diesel Driven Fire Pump, Jockey Pump & water Curtain pump)
350 mm dia 1 No.
2. Individual Suction Pipe (Suction Pipe for each of main Pumps)
200 mm dia 3
Nos.
3. Delivery Header 250 mm dia 1 No.
4. Delivery Pipe for Each of Main Pumps 150 mm dia 3
Nos.
5. Jockey Pump Suction Pipe 50 mm dia 2 Nos
6. Jockey Pump Delivery Pipe 40 mm dia 2
Nos.
7. Water Curtain Pump Suction Pipe 150 mm dia 1 Nos
8. Water Curtain Pump Delivery Pipe 150 mm dia 1
Nos.
A) SUCTION HEADER SIZE: SUCTION HEADER:
Quantity of Pumps = 3 Nos. (Main Fire Pump + Diesel Driven Fire Pump + Sprinkler Fire Pump)
Flow rate of each pump = 2850 LPM = 171 m3/hour.
Q1 = 0.0475 m3/sec.
Total Flow = 3 Nos. x 0.0475 m3/sec
Q = 0.143 m3/sec
Velocity considered at suction side
V = 90 m/minute = 1.5 m/sec
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 77
We know that
Q = A x V
0.143 = d2 x 1.5 4
d = 5.114.3
143.04
x
x
= 0.348 mm = 348 mm
Say = 350 mm dia. SUCTION PIPE FOR EACH OF MAIN PUMPS:
d = 5.114.3
4
x
xQ
= 5.114.3
0475.04
x
x
= 0.200 m = 200 m Say =200 mm dia.
DELIVERY HEADER:
Quantity of Pumps = 3 Nos.
Flow rate of each pump = 2850 LPM = 171 m3/hour.
Q1 = 0.0475 m3/sec.
Total Flow = 3 Nos. x 0.0475 m3/sec
Q1 = 0.143 m3/sec
Velocity considered at delivery side
V = 180 m/minute = 3.0 m/sec
We know that Q = A x V
Suction Header provided = 350 mm dia.
Suction Pipe for individual pump provided = 200 mm dia. .
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 78
0.143 = d2 x 3.0 4
d = 0.314.3
143.04
x
x
= 0.246 m = 246 mm
Say = 250 mm dia.
DELIVERY PIPE FOR EACH OF MAIN PUMPS:
d = 0.214.3
14
x
xQ
= 0.314.3
0475.04
x
x
= 0.142 m = 142 mm Say = 150 mm
JOCKEY PUMP SUCTION/DELIVERY SIDE:
Flow rate of Jockey pump = 180 LPM = 10.8 m3/hour.
Q = 0.003 m3/sec.
Velocity considered at suction side
V = 1.5 m/sec
We know that Q = A x V
0.003 = d2 x 1.5 4
Delivery Header provided = 250 mm dia
Delivery Pipe provided= 150 mm dia.
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 79
d = 5.114.3
003.04
x
x
= 0.0504 m = 50.475 mm
Say = 50 mm dia.
Velocity considered at delivery side
V = 3.0 m/sec
d1 = 0.314.3
003.04
x
x
= 0.035 mtr = 35 mm dia.
Say = 40 mm .
Suction Pipe Size provided = 50 mm dia.
.
Delivery Pipe Size provided = 40 mm dia.
.
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 80
WATER CURTAIN PUMP SUCTION/DELIVERY SIDE:
Flow rate of Jockey pump = 1620 LPM = 97.2 m3/hour.
Q = 0.027 m3/sec.
Velocity considered at suction side
V = 1.5 m/sec
We know that Q = A x V
0.027 = d2 x 1.5 4
d = 5.114.3
027.04
x
x
= 0.151 m = 150 mm
Say = 150 mm dia.
Velocity considered at delivery side
V = 3.0 m/sec
d1 = 0.314.3
027.04
x
x
= 0.107 meter = 107 mm dia.
Say = 150 mm
Suction Pipe Size provided = 150 mm dia. .
Delivery Pipe Size provided = 150 mm dia dia. .
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 81
IMPORTANT INDIAN STANDARDS FOR FIRE FIGHTING WORK
IS 1239-2004 (Part-I) Specifications for mild steel tube, tubular and other steel pipe fittings.
IS 1239-2004 (Part-II) Specifications for mild steel tube, tubular and other steel pipe fittings.
IS 1536-2001 Specification for centrifugally Cast (Spun) Iron pressure pipes with
flanges for water, gas and sewage. IS 1538 (Part 1 to 23) Specification for Cast Iron fittings for pressure pipes for water, gas and
sewage. IS 1726-1991 Code for cast iron manhole frame and cover. IS 3589-2001 Specification for electrically welded steel pipes for water, gas and
sewage. IS 4736-1986 Galvanizing G.I. Pipes IS 636-1988 Non percolating flexible Fire Fighting delivery hose (third revision) IS 694-2010 PVC insulated cables for working voltages upto and including 1.100
volts (third revision) IS 778-1984 Copper alloy gate, globe and check valves for water works purposes
(fourth revision) (Amendment 2) IS 780-2000 Sluice valves for water works purposes (50 to 300 mm) size (sixth
revision) (amendment 3) IS 884-1985 Specification for first-aid hose-reel for Fire Fighting (for fixed
installations) (first revision) (with amendment No.1) IS 900-1992 Code of practice for installation and maintenance of induction motors
(second revision) IS 901-1988 Specification for couplings, double male and double female,
instantaneous pattern for Fire Fighting (third revision) IS 902-1992 Suction hose coupling for Fire Fighting of purposes (third revision) IS 903-1993
Specification of fire hose delivery couplings branch pipe, nozzles and nozzle spanner (third revision) (Amendment 5)
IS 937-1981 Specification for washers for water fittings for Fire Fighting purposes
(revised) (with amendment No, 1)
AHMEDABAD COMMISSIONNER POLICE OFFICE POLICE COMMISSIONNER’S OFFICE BUILDING AHMEDABAD
|MEP DESIGN BASIS REPORT 82
IS 1520-1993 Horizontal centrifugal pumps for clear cold, fresh water (second revision)
IS 1536-2001 Horizontally cast iron pressure pipes for water, gas & sewage (first revision) (with Amendments No. 1 to 4)
IS 1554-1988 Part I PVC insulated (heavy duty) electric cables (working voltage up to and
including 1100 volts (third revision) IS 1554-1988 Part II PVC insulated (heavy duty) electric cables (working voltage from 3.3
KV up to and including 11 KV (second revision) IS 1648-1961 Code of practice for fire safety of buildings (General) Fire Fighting
equipment and its maintenance (with amendment No.1) IS 3624-1987 Pressure and vacuum gauges (Second revision) IS 4736-1986 Hot-dip zinc coatings on steel tubes (with Amendment No.1) IS 5290-1993 Specification for landing valves (second revision) (with Amendments
No.6) IS 5312- 2004 Part I Swing check type reflux (non-return) valves Part I-single door pattern
(with amendments nos. 1 & 2) IS 5312- 2004 Part II Swing check type reflux (non-return) valves Part II-Multi
door pattern (with amendments nos. 1 & 2) IS 7285
Seamless cylinders for storage of gas at high pressure.
IS 2189-2008 Code of practice for Automatic Fire alarm system IS 2195-1964 Specification for heat sensitive fire detectors IS 732-1989 Code of practice for electrical wiring installation