Annexure-V-CRB-SPEC

8/8/2019 Annexure-V-CRB-SPEC

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ANNEXURE -V

1.0 BUILDINGS - GENERAL REQUIREMENTS

1.1 GENERAL

The scope include the design, engineering and construction including anti-termite treatment, plinth protection DPC of Building including sanitary,water supply, electrification false ceiling etc. of control room building. Thebuilding shall be of RCC framed structure of concrete of M20 grade (Min.)

The contractor shall appoint a reputed architect (to be approved byPOWERGRID) for design of architecturally pleasing building and toincorporate local architecture.

1.2 CONTROL ROOM BUILDING

Floor area requirements of control room building have been given infollowing paragraph

:

Control room 40sqm

ACDB & DCDB room 200sqm

Battery room 40sqm

Electrical lab. 20 sq.m.

Conference room 40 sq.m.

S/stn. Incharge office 28 sq.m.Plus attached ToiletPlus PS room

Room for executives 50 sq.m.

Room for non-executives 15 sq.m.

Lobby 30 sq.m.

Corridor Minimum width of corridor shallbe 1600mm

Portico 25 sq.m. (approx.)

Common toilet 18 sq.m.

Toilet attached to 3.5 sq.m.conference room

Janitor room 4.0 sq.m.

Pantry 7 sqm

Above area are indicative and minor modifications can be done at the timeof detailed engineering. No cable vault shall be provided. Suitable RCCcable trench with covers made of chequered steel plate shall be provided.


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Any future possibility of annexe building shall be taken careof while finalising the layout of the control room building.

1.3 DESIGN

a) The buildings shall be designed:

1. to the requirements of the National Building Code of India,and the standards quoted therein.

2. for the specified climatic & loading conditions.

3. to adequately suit the requirements of the equipment andapparatus contained in the buildings and in all respects to becompatible with the intended use and occupancy.

4. with a functional and economical space arrangement.

5. for a life expectancy of structure, systems and componentsnot less than that of the equipment which is contained in thebuilding, provided regular maintenance is carried out.

6. to be aesthetically pleasing. Different buildings shall show auniformity and consistency in architectural design.

7. to allow for easy access to equipment and maintenance ofthe equipment.

8. with, wherever required, fire retarding materials for walls,

ceilings and doors, which would prevent supporting orspreading of fire.

9. with materials preventing dust accumulation.

b) Suitable expansion joints shall be provided in the longitudinaldirection wherever necessary with provision of twin columns.

c) Individual members of the buildings frame shall be designed for theworst combination of forces such as bending moment, axial force,shear force, torsion etc.

d) Permissible stresses for different load combinations shall be takenas per relevant IS Codes.

e) The building lighting shall be designed in accordance with therequirements of relevant section.


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f) The building auxiliary services like air conditioning and ventilationsystems, fire protection and detection systems and all othermiscellaneous services shall be designed in accordance with therequirements specified in relevant section or elsewhere in thisSpecification.

1.4 DESIGN LOADS

Building structures shall be designed for the most critical combinations ofdead loads, super- imposed loads, equipment loads, wind loads andseismic loads.

Dead loads shall include the weight of structures complete with finishes,fixtures and partitions and should be taken as per IS: 1911.

Super-imposed loads in different areas shall include live loads, minorequipment loads, cable trays, small pipe racks/hangers and erection,

operation and maintenance loads. Equipment loads shall constitute, ifapplicable, all load of equipments to be supported on the building frame.

The wind loads shall be computed as per IS 875, Seismic Coefficientmethod/Response Spectrum method shall be used for the seismicanalysis as per IS 1893 with importance factor 1.5.

Wind and Seismic forces shall not be considered to act simultaneously.

Floors/slabs shall be designed to carry loads imposed by equipment,cables and other loads associated with building. Floors shall be designed

for live loads as per relevant IS. Cable load shall also be consideredadditionally for floors where these loads are expected.

In addition, beams shall be designed for any incidental point loads to beapplied at any point along the beams. The floor loads shall be subject toPurchasers approval.

For consideration of loads on structures, IS: 875, the following minimumsuperimposed live loads shall, however, be considered for the design.

a. Roof 1.5 KN/M2 for accessible roofs

0.75 KN/M2 for in-accessible roofs

b. RCC-Floor (i) 5 KN/M2 for offices

(ii) 10 KN/M2 For equipment floors or(minimum) actual requirement, if

higher than 10 kN/M.based on equipment


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component weight andlayout plans.

c. Stairs & balconies 5 KN/M2

d. Toilet Rooms 2 KN/M2

e. Chequered 4 KN/M2plate floor

f. Walkways 3 KN/M2

Any additional load coming in the structure shall be calculated as perIS: 875.

1.5 SUBMISSION

The following information shall be submitted for review and approval to the

Purchaser:

1. Design criteria shall comprise the codes and standards used,applicable climatic data including wind loads, earthquake factorsmaximum and minimum temperatures applicable to the buildinglocations, assumptions of dead and live loads, including equipmentloads, impact factors, safety factors and other relevant information.

2. Structural design calculations and drawing (includingconstruction/fabrication) for all reinforced concrete and structuralsteel structures.

3. Fully, dimensioned concept plan including floor plans, crosssections, longitudinal sections, elevations and perspective view ofeach building. These drawings shall be drawn at a scale not smallerthan 1:50 and shall identify the major building components.

4. Fully dimensioned drawings showing details and sections drawn toscales of sufficient size to clearly show sizes and configuration ofthe building components and the relationship between them.

5. Product information of building components and materials,

including walls partitions flooring ceiling, roofing, door and windowsand building finishes.

6. A detailed schedule of building finishes including colour schemes.

7. A door & window schedule showing door types and locations, doorlock sets and latch sets and other door hardware.


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Approval of the above information shall be obtained before orderingmaterials or starting fabrication or construction as applicable.

1.6 INTERNAL FINISH SCHEDULE

TABLE-1

Sl.No. Location Flooring &

Skirting

150mm high

Wall Internal Ceiling Doors, Windows, Ventilators

1. Control Room Vitrified tiles8mm thick size600x600m

Oil boundwashabledistemper onsmooth surface

applied with 2mmthick Plaster of

Paris putty.

False ceiling& under deckinsulation

Anodised aluminium indal orequivalent extruded sections asper IS 733 & 1285. Flat drawnsheet glass (min. 5.5mm thick

double glazing with 12 mm gaphemeti cally sealed shall be

provided for windows andventilators. For doors singleglazing (5.5mm thick) shall be

provided.

2. Sub-station Incharge,Offices, Conference

library/record,corridor, staff,

electronic lab rooms

Vitrified tiles8mm thick size

600x600m

Oil boundwashable

distemper onsmooth surface

applied with POPputty.

False ceiling& under deck

insulation

Doors, Windows, Ventilatorsaluminium as above

3. Reception/Lobby Vitrified tiles8mm thick size

600x600m

Oil boundwashable

distemper onsmooth surfaceapplied with POPputty.

False ceiling& under deck

insulation

Doors, Windows, Ventilatorsaluminium as above

4. Battery room IPS flooring Oil boundwashabledistemper onsmooth surfaceapplied with POP

putty.


Steel door 45mm thk. doublesheet 18G steel suitablyreinforced and filled with mineralwool. Windows and Ventilatorsas at Sr.No.-1.

5. ACDB and DCDB,room

Ironite flooring Oil boundwashabledistemper on

smooth surface

applied with POPputty.


Steel door 45mm thk. doublesheet 18G steel suitablyreinforced and filled with mineral

wool. Windows and Ventilators

as at Sr.No.-1.

7. Toilet, Pantry,

Janitor room

Glazed tiles DADO glazed

tile 2.1M high

for toilet for

pantry above

working

platform up to

750 mm

False ceiling

& under deckinsulation

Shutters: 25mm thick

Prelaminated particle board

flat pressed door shutter

aluminium U beading (DSR

2007,9.131.1). with

aluminium frame. Windowsand Ventilators as at Sr.No.-1.


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8. Stair Kota stone(DSR-97 11.49)

- Oil boundwashabledistemper

1.7 FLOORING

Flooring in various rooms of control room building shall be as for detailedschedules given in Table -1

1.8 Walls

Control room buildings shall be of framed structure. All walls shall be non-load bearing walls. Thickness of external walls shall be minimum 480mm,excluding plaster, which will include 380mm of coursed rubble masonry onoutside and 100mm of half brick masonry on inside. Thickness of internalwall shall be 225mm excluding plaster.

1.9 Plastering

All internal walls shall have minimum 15mm thick 1:6 cement sand plaster.The ceiling shall have 6mm thick 1:4 cement sand plaster.

1.10 External Finishing

External surface of coursed rubble masonry shall be provided with ruledpointing.

1.11 Roof

Roof shall be sloping. 0.9mm thick corrugated GI steel sheet shall beprovided over Steel roof truss.

1.12 FALSE CEILING

The control room and all other areas specified in internal finish scheduleelsewhereshall have closed aluminium ceiling system comprising 84mmwide, 12.5mm deep panels of approved colour with a recessed flange of23.9mm roll formed out of 0.5mm thick aluminium alloy AA 5050

/5052/3003 chromatised and stove enamelled on both sides, panels to befixed on roll formed carriers 32mm wide 39mm deep out of minimum0.9mm thick aluminium alloy strip with cut outs to hold panels in a moduleof 100mm minimum at maximum 1.6 m c/c carrier suspended from roof by4mm diameter galvanised steel wire rod hangers with special heightadjustment springs/clips made out of spring steel at maximum spacing of1.5m c/c hangers fixed 25mm thick resin bonded mineral wool of approvedquality encased in 100 micron black polythene and laid over top of placed,


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panels, all complete. The system is to be got approved by purchaserbefore installation.

1.13 Under deck Insulation

The method of fixing shall consist of slotted M.S. angles of appropriatesize (minimum 65x50x2mm) fixed to soffit of RCC roof slab at 600mm

centres in both directions by Rawl plugs of adequate strength. The slotsshall have 14g G.I. tie wire drawn through them.

50mm thick insulation mat Fibreglass Crown - 100 or equivalent shall, bemade out of fibre-glass or approved equivalent conforming to IS:8183,backed with 34g aluminium foil and 22g x 12mm mesh wire netting. Thenet shall be stretched tightly across the slotted angles or slotted platesholding it in place by means of wires. The joints of the wire netting shall bebutted and tightly laced down with 14g G.I. wire. The system shall be gotapproved.

1.14 DOORS AND WINDOWS

The details of doors and windows of the control room building shall be asper finish schedule Table-1 and tender drawing with the relevant IS code.Rolling steel shutters and rolling steel grills shall be provided as per layoutand requirement of buildings. Paints used in the work shall be of bestquality specified in CPWD specification.

1.15 PARTITION

Partition, if required, shall be made of anodised aluminium frame provided

with 5.5 mm thick clear glass.

1.16 PLUMBING & SANITATION

(i) All plumbing and sanitation shall be executed to comply with therequirements of the appropriate bye-laws, rules and regulations ofthe Local Authority having jurisdiction over such matters. TheContractor shall arrange for all necessary formalities to be met inregard to inspection, testing, obtaining approval and giving noticesetc.

(ii) PVC SYNTEX or equivalent make Roof water tank of adequatecapacity depending on the number of users for 24 hours storageshall be provided. Minimum 2 Nos 1500 litres capacity shall beprovided.

(iii) Galvanised MS pipe of medium class conforming to IS:1239 shallbe used for internal & external piping work for potable water supply.


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(iv) Sand CI pipes with lead joints conforming to IS:1729 shall be usedfor sanitary works above ground level.

(v) Each toilet shall have the following minimum fittings.

(a) WC (Western type) 390 mm high with toilet paper roll holderand all fittings

or

WC (Indian Type) Orissa Pattern (580 x 440 mm) with allfittings.

(b) Urinal (430 x 260 x 350 mm size) with all fittings.

(c) Wash basin (550 x 400 mm) with all fittings.

(d) Bathroom mirror (600 x 450 x 6 mm thick) hard board

backing

(e) CP brass towel rail (600 x 20 mm) with C.P. brass brackets

(f) Soap holder and liquid soap dispenser.

(vi) Water cooler for drinking water with adequate water storage facilityshall be provided and located near control room instead of neartoilet block.

(vii) An Eye & face fountain conforming to IS:1052 shall be provided forbattery room.

(viii) 1 no. stainless steel kitchen sink with Drain board (510 x 1040 x178 mm bowl depth) for pantry shall be provided.

(ix) All fittings, fastener, grating shall be chromium plated.

(x) All sanitary fixtures and fittings shall be of approved quality andtype manufactured by well known manufacturers. All items broughtto site must bear identification marks of the type of the

Manufacturer.

(xi) Soil, waste and drain pipes, for underground works shall be stoneware for areas not subject to traffic load. Heavy duty cast iron pipesshall be used otherwise.

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Annexure-V-CRB-SPEC