Tech Spec for General Civil Works

7/29/2019 Tech Spec for General Civil Works

1/130

KARNATAKA POWER CORPORATION LIMI TED

700 + 20% MW GAS FIRED COMBINED CYCLE POWER PLANTAT BIDADI, RAMANAGARA DISTRICT,

KARNATAKA STATE

INTERNATIONAL COMPETITI VE BIDDING

BID SPECIFICATIONS FOR EPC CONTRACTSPECIFICATION NO. CEGSW / BIDADI / EPC / 001

VOLUME - IV

TECHNICAL SPECIFICATIONSection D4: CIVIL

KARNATAKA POWER CORPORATION LIMITED

CHIEF ENGINEER (GSW)2nd FLOOR, SUDARSHAN COMPLEX,

NO. 22/23, SHESHADRI ROAD,BANGALORE 560 009, INDIA

JULY 2012


2/130

SECTION - D4


3/130

KARNATAKA POWER CORPORATION LIMITED SECTION: D 4.0

CONTENTS

SHEET 1OF 1

ISSUE

R0

TITLE

SPEC. NO.

CETD-BIDADI-EPC-001

SUB SECTION TITLE NO. OF PAGES

D 4.1 GENERAL 2

D 4.2 SCOPE OF WORK 2

D 4.3 DOCUMENTS TO BE SUBMITTED BY BIDDER

WITH EPC BID PERTAINING TO CIVIL WORKS 2

D 4.4 DOCUMENTS TO BE SUBMITTED BY THE

CONTRACTOR AFTER AWARD OF CONTRACT 2

D 4.5 DESCRIPTION OF BUILDING,STRUCTURES & FACILITIES 40

D 4.6 TECHNICAL SPECIFICATION

PART A - GENERAL REQUIREMENT 7

PART B - LOADS AND LOAD COMBINATIONS 11

PART-C - REINFORCED CONCRETE STRUCTURES

AND FOUNDATIONS 10

PART-D - STEEL STRUCTURES 17

PART-E - OUT DOOR CIVIL WORKS 6

PART-F - FINISHING WORKS 14

PART-G - INDUCED DRAFT COOLING TOWER 9

PART-H - CODES, STANDARDS AND REFERENCES 14


4/130


GENERALSHEET 1 OF 2

ISSUER0

TITLE

SPEC. NO.:CEGSW/BIDADI/EPC/001

1. This specification is to cover the design, preparation of general

arrangement, construction as well as Fabrication drawings, supply ofall labour as well as materials and construction of all civil, structural aswell as architectural work on EPC basis.

2. Description of various items of work under this specification and natureof work in detail are given hereinafter. The complete work under thisscope is referred to as CIVIL WORKS. Lists of various civil works arecovered under the scope of work given in Section D 4.2.

3. The work to be performed under this specification consists of design,engineering as well as providing all labour, materials, consumables,equipment, temporary works, temporary labour and staff colony,

constructional plant, fuel supply, transportation and all incidental itemsnot shown or specified but reasonably implied or necessary for thecompletion and proper functioning of the plant, all in strict accordancewith the specifications, including revisions and amendments theretoas may be required during the execution of the work.

4. All materials including cement, reinforcement steel and structural steelshall be arranged by the Bidder.

5. The scope shall include setting up a temporary testing laboratory atsite to carry out cube tests on concrete and all other tests shall becarried out at nearby engineering colleges.

6. The work shall be carried out according to the design/drawingsapproved by the OWNER. For all building and structures, foundations,etc., necessary layout and details are to be developed keeping in viewthe statutory & functional requirements of the plant and facilities andproviding enough space and access for operation, use andmaintenance, taking into consideration the future expansion of twoblocks of similar size and capacity. Certain minimum requirementsare indicated in this specification for guidance purpose only.However, the BIDDERs offer shall cover the complete requirementsas per the best prevailing practices and to the complete satisfaction of

the OWNER.

7. BIDDER shall inspect the site, examine and obtain all informationrequired and satisfy himself regarding matters and things such asaccess to site, communications, transport, right of way, the type andnumber of equipment and facilities required for the work, availability oflocal labour, materials and their rates, local working conditions,weather, subsoil conditions, natural drainage, etc. Ignorance and


5/130


GENERALSHEET 2 OF 2

ISSUER0

TITLE


wrong assumptions of the site conditions shall not be accepted by the

Owner as basis for any claim for compensation or extension of time.The submission of a bid will be construed as evidence that such anextensive examination was made and any later claims / disputes inregard to price quoted shall not be entertained or considered by theOWNER on account of ignorance of prevailing site conditions.

8. GEOTECHNICAL INVESTIGATION

Bidders are advised to analyse the report of preliminary geo technicalinvestigation carried out by the owner and are advised to take a fewmore bore logs, if felt necessary, before submitting the bid.

9. SURVEY DATA

The OWNER has carried out a preliminary survey of the area anddrawings indicating the survey detail along with contour map shown indrg. no. CEGSW-BIDADI-CM-001. This should be treated as forreference only. However, the BIDDER has to carryout a detailedtopographical survey of the area through some reputed / approvedagencies, if necessary and the same shall be submitted for OWNERsreview. It is the responsibility of the BIDDER to verify the variousfeatures on his own.

10. STATUTORY REQUIREMENT

Bidder shall comply with all the applicable statutory rules pertaining toFactory act, Fire safety rule of LPA, Water act for Pollution control,Explosives act etc. Provisions of Safety, health and welfare accordingto Factories act shall also be complied with. Statutory clearances andnorms of State Pollution Control Board as well as MOEF guidelinesshall be followed. Bidder shall obtain approval of Civil / Architecturaldrawings from concerned authorities before taking up the constructionwork.


6/130


SCOPE OF WORK

SHEET 1OF 2

ISSUER0

TITLE


1.0 The works covered in this section consists of collection of all site

related data, conducting topographical surveying if necessary, siteinvestigations, design, preparation of all construction drawings, supplyof all materials, construction, fabrication, erection and testing wherenecessary, of all structures required for housing all equipment and civilworks for all services required for the Power Plant defined in thespecification document. The Civil works shall include those requiredfor Installation, Commissioning, testing, operation and maintenance ofthe Power Plant. The Scope will cover but not limited to the followingbuildings / structures / systems / facilities.

1.1 Site related investigations, consisting ofa) Topographical Surveying

b) Geotechnical Investigation

1.2 Site development works, consisting ofa) Site clearanceb) Site grading (excluding power block area, which has been

graded to RL 717.00)c) Roads, drains and culvertsd) Storm water and sewage disposal system.

1.3 Construction enabling works1.4 Gas / Steam Turbine Generator building1.5 Control room building1.6 Steam generator / Deaerators Supporting structure1.7 Steel chimneys1.8 Steam generator area paving and foundations1.9 Transformer yard structures1.10 Switch yard structures including relay room1.11 Switch gear rooms1.12 Fuel gas system1.13 D.M. Plant1.14 Condenser cooling water system1.15 Induced Draft Cooling towers1.16 Raw water system

1.17 Miscellaneous plant buildings, consisting ofa) Workshopb) Permanent stores / Ware housec) Emergency Diesel generator housed) Compressor house

1.18 Non plant buildings, consisting ofa) Administration buildingb) Canteen


7/130


SCOPE OF WORK

SHEET 2OF 2

ISSUER0

TITLE


c) Gate house / Time office

d) Fire station complexe) First aid centref) Parking sheds.g) Technical and supporting staff Building in plant area.h) Guest House with six Suites

1.19 Effluent treatment plant1.20 Pipe and cable racks1.21 Horticulture and landscaping

2.0 It is not the intent to specify herein all the works in the scope of thiscontract. The scope also includes all other buildings, structures and

works necessary which are not specifically mentioned here but requiredfor construction, operation and maintenance of the power plant aredeemed to be included in the scope. All works shall conform to thespecification. The works shall conform to high standards of design,engineering and workmanship. Design and construction shall conformin every respect to all local and state regulations governing such worksand to stipulations of Indian Standards unless stipulated otherwise indetailed specification.


8/130


DOCUMENTS TO BE SUBMITTED ALONG WITH

EPC BID DOCUMENTS

SHEET 1OF 2

ISSUER0

TITLE


1. Suggested plot plan locating all buildings, structures, facilities roads,

temporary site office, etc and also indicate/earmark the area requiredfor future expansion of two blocks of similar size and capacity.

2. A study note on proposed site grading

3. Write up on proposed storm water drainage system furnishing layoutof the drains, types of drains and suggested disposal system.

4. Write up on proposed sewage disposal system for the toilet in variousbuildings and scheme for usage / disposal of the clear water.

5. Write up on proposed treatment and disposal of effluent / waste water

generated in the plant and scheme for usage / disposal of clear water.

6. A detailed write up on Condenser cooling water system along withschematic drawing showing preliminary sizing and details of Coolingtowers, channels, forebay and pump house, cold and hot waterconduits and the method of construction.

7. A detailed write up on make up water system for the cooling towerblowdown, covering source of water, Intake / withdrawal arrangement,pump houses, conduits along with the method of construction.

8. A detailed write up on Raw water system covering source of water,conveying system, reservoir, over head tank, pump houses etc.

9. A report on foundation proposed for various structures, buildings andfacilities. Allowable safe bearing capacity for open foundation, depthof foundation, need for pile foundations, soil improvement if anyrequired, special precaution against aggressive soil etc shall also becovered in the report.

10. A write up on dewatering system proposed at the time of constructionwhere deep construction such as C.W. forebay and pump house etc.are to be executed and where water table is higher.

11. General arrangements / architectural drawings for all buildings andstructures showing dimensions, levels, plans, sections, elevations,materials proposed, types of framing, wall / cladding, floors, roofs,types of finishes etc.

12. Detail design criteria proposed to be adopted for each building,structures, foundations, facilities etc.


9/130


DOCUMENTS TO BE SUBMITTED ALONG WITH

EPC BID DOCUMENTS

SHEET 2OF 2

ISSUER0

TITLE


13. A write up on the sizing and constructional details of steel chimney

with sketch showing detail of foundation, wind shield and liners alongwith list of appurtenances.

14. List of software proposed to be used in various areas for analysis,design, drafting as well as project monitoring along with their sourcesand validation report for software.

15. List of all Sub-CONTRACTORs that the BIDDER proposed to employ,in case the contract is awarded to him, indicating their addresses withtelephone number, experience on similar jobs, name, qualification andexperience of persons who shall be employed in the job on behalf ofthe Sub-CONTRACTOR etc shall be submitted to the OWNER. Only

the Sub CONTRACTOR, approved by the OWNER shall be engaged.

16. Details of quality control laboratory with a list of testing equipmentshall be furnished.

17. Schedule of unit prices duly filled in with rates.

18. All deviations from bid document shall be furnished in the format givenin the specification document. Deviation furnished elsewhere in thebid other than at the place titled Deviations will not be consideredas deviations.

19. List of furniture and furnishings proposed for plant control room(s).

20. Any exclusions from the scope mentioned shall be clearly mentionedseparately in a section titled EXCLUSIONS. Only the detailsmentioned in this section shall be considered as exclusions. All works,other than these, shall be deemed to be included in the scope of thiscontract and shall be executed at no extra cost.


10/130


DOCUMENTS TO BE SUBMITTED BY THESUCCESFUL BIDDER AFTER THE AWARD

OF CONTRACT

SHEET 1OF 2

ISSUER0

TITLE


1.0 The following documents are to be submitted for approval of theOWNER, prior to commencement of fabrication & erection /construction. All drawings shall be of standard sizes (Metric system)and shall be made on AUTOCAD latest version. The list is notexhaustive but indicative only:

(a) Topographical survey drawings along with location and details ofBench mark, grid and boundary pillars based on detailed surveyconducted after the award of work.

(b) Geotechnical investigation report based on geotechnicalinvestigation carried out along with foundation recommendationfor various buildings / structures / facilities.

(c) Site grading (excluding power block area) and storm waterdrainage study furnishing levels of various terraces,arrangement and details of drains, culverts etc for storm waterdrainage system.

(d) Study note on disposal of sewage and other effluent from theplant to satisfy the statutory requirement.

(e) General plant layout drawing with co-ordinates of roads,boundary wall, watch towers, roads connecting watch towers,buildings and facilities, piping / cable corridors, pipe and cabletrestles, landscaping, diversion drains, equipment lay downareas etc.

(f) Design basis memorandum for all buildings, facilities, servicesand structures.

(g) Architectural floor plans, elevations, cross sections andperspective view in colour for all buildings. For main plantbuilding two different schemes along with a report elaboratingthe underlying philosophy of the proposed architectural conceptsshall be submitted.

(h) Design calculations and drawings for foundations / substructureand superstructure of all buildings including pump houses andother structures.

(i) Design calculations including dynamic analysis and drawings forall foundations subjected to dynamic loads like foundations for

GTG, STG, BFP, etc.(j) Design calculations and drawings for structures and foundationsin switchyard, transformer yard, etc.

(k) Design calculations and drawings for structures pertaining toCooling water system.

(l) Design calculations and drawings for structures for raw water /make up water system such as, but not limited to, intake, rawwater reservoir, pump house, over head tank, etc.


11/130


DOCUMENTS TO BE SUBMITTED BY THESUCCESFUL BIDDER AFTER THE AWARD

OF CONTRACT

SHEET 2OF 2

ISSUER0

TITLE


(m) Design calculations and drawings for civil structures / worksassociated with fuel gas system.

(n) Drawings of all architectural works including finish schedule,colour scheme (both internal and external), doors and windows,flooring and false ceiling, etc.

(o) All design and drawings for the Cooling towers.(p) All design and drawings for steel chimney.(q) Drawing showing underground facilities with co-ordinates of

these facilities like buried pipes, buried cables, trenches, ducts,sewer, drains, sumps, pits, culverts, foundations etc.

(r) All other designs, details / drawings or any other submissions as

indicated else where in this specification and as required by theOWNER.

(s) Details of corrosion protection measures for all structures.(t) Copies of all reports on investigation and studies carried out

shall be submitted.(u) Total quantity of concrete (grade wise), reinforcement steel

(diameter wise) and structural steel (section wise) in allconstruction drawings.


12/130


DESCRIPTION OF BUILDING, STRUCTURES ANDFACILITIES

SHEET 1 OF 40

ISSUER0

TITLE


1.0 The description against each service / building / system isindicative only and not exhaustive. Although almost all the systems

are covered here but any other system (Civil, Structural andArchitectural) required for successful completion of the project shallform a part of this contract and shall deemed to be included in thescope of works.

2.0 SITE RELATED INVESTIGATION

2.1 Topographical surveying

The work of conducting topographical survey has already beenconducted. Temporary BM (RL +724.794 & RL +717.794) isavailable in the plant boundary. Bidder to confirm the values with

respect to the GTS benchmark value. The BIDDER has to carryouta detailed topographical survey of the area through some reputed /approved agencies, if necessary and the same shall be submittedfor OWNERs review.

2.1.1 Precision Surveying shall be carried out under the direction andcontrol of a Licensed Land Surveyor. Surveying shall be carriedout using Total Station. All Bench Mark (BM) levels of the surveyshall be established with reference to the nearest GTS bench markavailable. Precision levelling shall be carried out for establishingthe BM at site by carrying levels from GTS BM adopting doublecircuit levelling.

2.1.2 All boundary lines shall be located with their distances, includedangle and bearings. A closed traverse survey shall be carried outto form the framework for the detailed survey work.

2.1.3 Two reference line, North-South line and East-West line at rightangles to each other shall be established with grid pillarsconstructed at 200 metres c/c in both directions. Bench mark pillarsshall be provided atleast at 6 locations. Pillars shall also be paintedusing synthetic enamel paint for easy identification. Coordinatesshall be painted on these grid pillars. These pillars shall be properly

protected to prevent disturbance during construction activities. BMshall be distinguished from grid pillars with different type ofpainting.

2.1.4 Spot levels shall be taken in a grid of 50 meters and contours shallbe established at an interval of 500 mm. All Contour levels shall bewith respect to MSL.


13/130



SHEET 2 OF 40

ISSUER0

TITLE


2.1.5 The survey map should identify all topographical features such asbut not limited to buildings, structures, burial grounds, wells, natural

drains, roads, footpaths, depressions, rock out crops, undergroundsources, overhead transmissions lines, telephone lines or any otherobstruction, trees and prominent vegetation. In addition, all wetland and marshy stretches shall also be identified. The contourmap to a scale of 1 in 1000 in AutoCAD shall be prepared. Inaddition, LS and CS of the site at suitable intervals to adequatelyrepresent actual topography shall be prepared. For natural drainsand other water courses sections at closer intervals shall beprovided.

2.1.6 One soft copy in the form of CD along with six copies of all surveydrawings shall be submitted to the Owner for his reference.

2.2 Geotechnical investigations

Detailed geotechnical investigation shall be carried out by theBidder on award of work. Based on the plot plan developed, thefield and laboratory testing scheme shall be prepared and obtainthe approval of Owner prior to commencing the investigation. Inthe power block boreholes shall be provided and spread judiciouslyto cover all major structures as well as equipment foundations.Generally, a grid of 50m centre to centre bothways isrecommended from stack to end of switchyard. In the other areasit shall be ensured that the boreholes are provided near all majorstructures.

2.2.1 Following field tests shall be conducted:i) Bore Holes and standard penetration tests.ii) Static Plate load testsiii) Cyclic Plate load testiv) Permeability testsv) Density and moisture content testsvi) Vane Shear testsvii) Static Cone and dynamic cone Penetration testsviii) Soil resistivity tests.

ix) Pressure meter testsx) Block Vibration tests

2.2.2 Bore holes shall be located wherever it is felt necessary and at thelocations of all important structures. All bore holes shall be sunk upto a depth of 20.0 m or 5 m continuous into hard rock whichever isearlier.


14/130



SHEET 3 OF 40

ISSUER0

TITLE


2.2.3 Standard penetration tests (SPT) and collection of undisturbed soilsamples (UDS) shall be carried out alternatively at 1.0 m intervals

and at significant change of strata. The interval shall be increasedto 1.5 m below 5 m depth of boring. UDS shall be replaced by SPTin cohesionless strata. Even in highly weathered / disintegratedrock, where core recovery is poor, SPT shall be conducted. Thefirst SPT in any borehole shall be conducted at 1m depth.

2.2.4 In rock strata, core recovery and Rock Quality Designation (RQD)shall be noted carefully for each run, immediately after cores aretaken out of barrel.

2.2.5 During boring, the level at which ground water is struck shall becarefully noted. Ground water samples shall be collected for

chemical analysis. Water samples shall be collected before theaddition of water or drilling mud to the hole.

2.2.6 Following laboratory tests shall be conducted: (Preferably onUndisturbed soil samples and if UDS is not possible, on remouldedsoil samples.)

(a) Grain size analysis

(i) Hydrometer analysis(ii) Sieve analysis

(b) Specific Gravity

(c) Chemical Analysis of soil and ground water includingSulphates, Chlorides, pH value, etc.

(d) Chemical Analysis of 2:1, Water : Soil extract of thesamples giving SO3 content.

(e) Consistency Limit: Liquid Limit, Plastic Limit, PlasticityIndex, Shrinkage Limit and Shrinkage ratio.

(f) Consolidation test giving all relevant parameters.

(g) Swelling pressure and free swell index for expansivesoils.

(h) Unconfined Compressive Strength on soil samples

(i) Direct Shear Test

(j) Triaxial Compressive Strength Tests:


15/130



SHEET 4 OF 40

ISSUER0

TITLE


(i) Unconsolidated Undrained Test

(ii) Consolidated Undrained Test(iii) Consolidated Drained Test

(k) Moisture-density relations for Standard Proctor andModified Proctor tests.

(l) Crushing Strength, specific gravity, unit weight, waterabsorption test on Nx size rock specimens.

(m) Permeability test

2.2.7 The Geotechnical investigation report shall necessarily include, but

not be limited to the following information.

(a) Recommended types of foundation.

(b) Allowable safe bearing capacities and settlement valuesin different strata for shallow foundations indicatingrelevant design criteria adopted, method of analysisadopted etc.

(c) If pile foundations are necessary, type of pilesrecommended with reasons for the same, length,diameter, allowable capacity (vertical, lateral and pullout)

of individual and groups of piles, negative skin friction ifany and magnitude of estimated negative skin friction.

(d) Recommendations for values for modulus of subgradereaction for foundation design.

(e) Type of cement to be used for concrete substructures andin stone / brick masonry foundations with reference to thechemical nature of subsoil and ground water.

(f) Recommendations regarding excavations (shallow &deep), embankment, safe side slopes for excavation andembankment, dewatering, site drainage, etc.

(g) Recommended soil properties such as density, specificgravity, cohesion, angle of internal friction etc. for design.

(h) Precautions to be taken for design of lightly loadedstructures when expansive soil is encountered withrespect to swelling pressure and free swell index valuesobtained.


16/130



SHEET 5 OF 40

ISSUER0

TITLE


3.0 SITE DEVELOPMENT WORK

3.1 Site Clearance

3.1.1 The plant and building areas in the site shall be cleared of all trees,shrubs or other vegetation, rubbish, slush etc., and otherobjectionable matters. It is Bidders responsibility to undertake asite visit and accordingly make a note of the existing structures thatare needed to be dismantled. If any roots or stumps of trees aremet during excavation, they shall also be removed. Where earth fillis intended, the area shall be stripped of all loose / soft patches ortop soil containing objectionable matter before filling commences.Any structure or services existing at the site shall be removed /rerouted with the permission of the Owner. Existing wells, pits,

marshy areas etc shall be filled up with earth of approved quality.The existing irrigation tank inside the plant boundary shall beretained. The HFL of the irrigation tank is 710.85 m. The waterspread area at the full level of the tank has to be maintained to suitwith site requirement.

3.1.2 The Bidder shall be deemed to have visited and carefully examinedthe site and surroundings and to have satisfied himself about thenature of the existing structures, underground services, general siteconditions, the site for disposal of surplus materials, debris etc andall other items affecting the work. Claims due to ignorance of siteconditions will not be considered after submission of Bid.

3.2 Site Grading

3.2.1 The site grading level shall be based on the detailed topographicalsurvey conducted at site.

3.2.2 In order to optimise the use of locally available earth, terracedgrading may be considered. Bidder to note that non-swellingselected earth can be used for back-filling. Fills shall normally bemade up of CNS material capable of being compacted up to 97%Modified Proctor density. In case earth has to be borrowed from

outside the plant boundary, the same shall be arranged by theBidder himself. Earth from Swamps, marshy as well as bogs,expansive type of clays, peat, organic material, materialsusceptible for combustion, material which will react with othermaterial already used in work shall not be used as borrow material.A minimum side slope of 1 vertical: 2 horizontal shall be maintainedat all slopes.


17/130



SHEET 6 OF 40

ISSUER0

TITLE


3.2.3 Slopes shall be provided with proper protection in the form of stonepitching to prevent erosion.

3.3 Compound wall

Boundary wall is existing and only gates, as described in clause 3.5,shall be provided. However necessary modifications, if any, in theboundary wall for providing and fixing the gate shall be included inthe scope.

3.4 Fencing

Minimum 3 m high fencing above the toe wall shall be providedaround switch yard, transformer yard, auxiliary transformer yard,

stores etc wherever fencing is necessary due to security / safety /statutory requirements. Fencing shall comprise of 2.4 m high PVCcoated galvanised chain link fence of minimum 8 gauge (includingPVC coating) with mesh size 75 mm and galvanised barbed wireon inclined member to a height of 600 mm above the chain linkfencing. 3 Lines of 12-gauge high tensile spring steel wire shall beprovided for the entire length of fencing. Also 50 mm X 6 mmgalvanised MS flats shall be provided at every fifth postsandwiching the fencing with post using GI nuts and bolts. Top oftoe wall shall be 200 mm above formation level. Toe wall shall begenerally of RCC construction and shall extend 150 mm below theformation level and the fencing mesh shall be embedded inside toewall by minimum 75 mm. Fencing post shall be fabricated out ofgalvanised MS angle section of minimum 75x75x6 mm size andshall be spaced at a maximum spacing of 2.5 m with struts madeup of galvanised MS angle at every fifth fencing post in addition tothose at bends. Expansion joint shall be provided at every 60 m.Steel entry gates shall be provided for all fenced areas. Gates shallbe formed out of tubular section conforming to IS: 1161.Removable type of fencing shall be provided at suitable location topermit entry and exit of equipment.

3.5 Security Gate Complex

3.5.1 The complete security gate complex consisting of approach road,gates, guard house, wicket gate, Time and security office, speedbreakers, traffic barriers and parking / waiting space etc shall becarefully planned such that they function smoothly especially at thetime of change of shift. The whole complex shall be aestheticallypleasing merging with the architecture of the compound wall.


18/130



SHEET 7 OF 40

ISSUER0

TITLE


3.5.2 Speed breakers shall be provided both outside and inside thecompound with manually operated traffic barriers inside.

3.5.3 Adequate paved area shall be provided both inside and outsidefor parking of waiting vehicles. There shall be two main gates7500 mm wide each with two leaves and a guard house inbetween. A minimum of 4 wicket gates shall be provided on oneside to allow entry and exit of pedestrian and cyclists. The gateposts and guard house shall be of RCC construction. The gateframe shall be made of structural steel tubular / rolled section withplate / mesh for the body. For smooth operation of gates, rollersshall be provided which moves on rails embedded in the roadpaving. The design of the gates shall be aesthetically pleasing.

3.6 Watch towers

Watch towers shall be constructed with RCC framework and brickin fill wall. Floor of the tower shall be at least 6 m above gradedlevel. Covered area for each tower shall be approximately25 sq.m. Number of towers shall be such that the completeperiphery of the plant can be watched from these towers but in nocase the number of towers shall be less than Six (6).

3.7 Roads, Drains and Culverts:

3.7.1 All roads and vehicular parking areas shall be of rigid pavementtype of concrete construction.

3.7.2. The main access road to the plant shall be four laned with a refugeof about 3 m wide in between double lane up and down roads.The road shall be designed to cater to the load and needs ofconstruction and maintenance of heavy trucks carrying machineryand heavy cranes. All other roads providing access to buildings /structures / systems requiring maintenance by vehicles shall be7 m wide. All other minor roads shall be 4 m wide. 1500 mm wideroad shoulder shall be provided on either side of all two lane roadsand 750mm wide shoulder on either side of 4.0m wide road.

Shoulders shall be provided with cobble stones or with interlockingconcrete paving blocks of approved shape/design and colour.Bidder to design as per standard and good engineering practice,which is to be highlighted in Bidders proposal.

3.7.3 On either side of the roads open drains shall be provided. Minimumclear width of the drain shall be 600 mm. The drains shall bedesigned and constructed using RCC. Drainage lines and otherunder ground services shall be located at least 1 m clear from the


19/130



SHEET 8 OF 40

ISSUER0

TITLE


edge of the road shoulder. All service and utility lines crossing theroads shall be taken up through NP3 class RCC pipe designed for

impact loading. Culverts shall also be generally using NP3 classpipe. In case the diameter of the pipe required is more than 600mm, cast in situ RCC box culvert shall be provided.

3.8 Storm Water Drainage:

3.8.1 The drainage system shall be designed for a maximum hourlyrainfall of 75mm. Run off coefficient for paved and unpaved areasshall be taken as 0.9 and 0.6 respectively. Exact terminal pointlocation at plant boundary shall be finalised during detailedengineering.

3.8.2 Storm water drainage system shall be designed in two parts.(a) Main drains(b) Auxiliary drains

Main drains shall be designed as a network covering total plantarea and shall ultimately be led to nearest water body. Auxiliary /branch drains shall cover individual graded terraces to collectdischarge from plant buildings and shall connect to main drain atsuitable locations.

3.8.3 Drainage for plant effluent and storm water shall be carried bygravity. The drains shall generally be of open type and constructed

with RCC. RCC box culverts shall carry drainage under roads.3.8.4 At places where covered drainage system is required, channels

with removable cover shall be preferred to piping system, as pipedsystem tend to get blocked. Underground storm water piping shallbe restricted strictly to areas where surface drains are not desirableor practicable from functional point of view.

3.8.5 Drainage shall be provided where necessary to prevent pondingand ground erosion and to carry surface water away from building,structures and other works including roads, building or equipmentfoundations.

3.8.6 The storm water drainage for the contaminated area such as fueloil areas and oil skids etc. shall be designed separately and thedischarge shall be led separately for treatment and disposalthrough oil water separator.


20/130



SHEET 9 OF 40

ISSUER0

TITLE


3.9 Sewage / Waste Water Drainage

3.9.1 For plant area sanitary sewage disposal, common septic tanksshall be provided at suitable locations for all buildings. The overflow from the septic tank shall be led to dispersion trenches or soakpits.

3.9.2 Waste water generated from the plant and canteen waste watershall be treated in a full scale effluent treatment system. Thetreated effluent shall be used for watering the trees andmaintenance of green belt area. Provision shall also be made forcollection and disposal of solid waste. HDPE or DI pipes shall beused to carry sewage / waste water. The pipes shall be encased inconcrete at road crossings. Manholes shall be at junctions and

change of direction. In straight stretches manhole shall be providedat a maximum spacing of 30 m.

4.0 CONSTRUCTION ENABLING WORKS

4.1 Construction water:

Construction water to the extent available at site on as-is basistowards both quality and quantity may be used by the Bidder freeof cost, for which Owner is not responsible. Suitability of use of thiswater has to be examined by the Bidder. Moreover, Bidder has toconsider his own arrangement at his own cost for any additionalrequirement of construction water. Bidder has to make his ownarrangement for necessary pumps, pipelines, ground water tanks,pipe network for conveying water to construction site. The wateravailable from the local pond can also be considered if available.

4.2 Construction power

Temporary power supplies required for the performance of theWork and other obligations under the Contract (the ConstructionPower) shall, to the extent of 2 MVA will be arranged, by theOwner at one suitable location. Such Construction Power shall be

in accordance with applicable safety and code requirements.Construction power will be provided Free of cost. Further extensionof power line to the various locations required shall be arranged byCONTRACTOR at his cost. Bidder shall make his ownarrangement for D.G sets as standby power source. This isespecially in the case of structure involving deep dewatering aswell as where uninterrupted concreting has to be resorted to. Thebidder along with his bid shall indicate his average and peak powerdemand.


21/130



SHEET 10 OF 40

ISSUER0

TITLE


4.3 Temporary site buildings

The Bidder shall provide, at his cost, the following building facilitiesfor proper execution and quality control of the job, while meetingthe provision stipulated by Factory Rules regarding staff welfarefacilities. All these building shall have brick cladding, CGI sheetroofing over steel roof truss with cement concrete flooring and falseceiling with air conditioning as required.

4.3.1 Site office

The site office shall make a provision of about 300 sqm of officearea with A/C and false ceiling for the use of Owner / Owners

representative in addition to the CONTRACTORs requirement.Additionally an A/C Conference room to accommodate about 25people shall also be provided in the site office complex for theOwners use. In addition to these, basic facilities like toilet forgents and ladies, potable water tanks, soak pit and septic tank forsewage disposal shall also be provided.

4.3.2 Stores

A covered store shall be provided with brick cladding and G.I./colour coated sheeting to store at least one month requirement ofcement. Cement in bags shall be stored on a raised floor wellaway from outer walls and insulated from the floor to avoidmoisture. Not more than 15 bags shall be stacked in any tier.Each consignment of cement shall be stored separately andconsumed in its order of receipt. The temporary stores buildingshall be dismantled after all the construction activities arecompleted and the area shall be cleared.

4.3.3 Covered storage area may also be provided to store otherconstruction material which will be affected on exposure to wind,sun and rain.

4.3.4 Reinforcement shall be stacked on top of timber sleepers to avoidcontact with ground / water.

4.3.5 Paved or unpaved storage yard shall be provided with in the storescomplex for storage of other material.

4.3.6 Proper fencing and security arrangement shall be provided for thestores complex.


22/130



SHEET 11 OF 40

ISSUER0

TITLE


4.4 Temporary workshop and garage

The temporary workshop and garage shall be provided to attend toroutine maintenance and repair of the construction equipment aswell as the fleet of vehicles used for construction activities.

4.5 Fabrication yard

Depending on the extent of fabrication envisaged at site, the Biddershall establish a full fledged structural fabrication yard withadequate handling facility during and after the fabrication. A fullyequipped testing laboratory providing radiography, ultrasonic, dyepenetration, magnetic particle test facilities shall be ensuredadjacent to the fabrication yard to enforce strict quality control.

Portion of the yard shall have covered shed with HOT / EOT cranesso that fabrication work can proceed even during inclementweather.

4.6 Quality Control Laboratory

Quality control laboratory as required shall be established at sitewith qualified personnel to conduct acceptance test on allconstruction material, weldments, concrete cubes etc. Thislaboratory shall be housed in a covered building with A/C facility asrequired by the testing facility. All testing equipment shall beprocured and shall be periodically calibrated to the satisfaction ofthe OWNER. All the sampling & testing shall be done in thepresence of OWNERs representative & the contractor shall abideby the observations of owners representative & rectification assuggested shall be effected. The owner shall have the right to carryout such tests independently, as & when so desired by the owner.

4.7 Staff welfare facility

4.7.1 Adequate facility for his staff inside the plant boundary such asToilets for both gents and ladies, Canteen, drinking water facility,rest places, proper disposal of sewage and other waste wateras

per the requirement of pollution board, etc, shall be provided.

4.7.2 Sufficient area out side the plant boundary to locate his staff andlabour colony shall be provided. Construction and maintenance ofthe staff and labour colony to satisfy all statuary requirement is thesole responsibility of the CONTRACTOR.


23/130



SHEET 12 OF 40

ISSUER0

TITLE


5.0 GAS TURBINE AND STEAM TURBINE GENERATOR BUILDING

5.1 Turbine building framing shall be of structural steel with momentconnection in the transverse direction and bracing in thelongitudinal direction.

5.2 Service and maintenance bays shall not have any intermediatefloors, however a 1500 mm wide observation gallery with hand railsshall be given along the wall at the operating floor level to observethe TG erection operation. The operating floor shall be RCC floorover steel framing constructed over permanently colour coatedgalvanised M.S. troughed metal sheet of approved profile, whereas the floor at any other level as required may have hot-dipgalvanized gratings supported on structural steel frame work.

5.3 Crane rail level shall be fixed based on the equipment to be lifted.At crane girder top flange level a crane walkway shall be providedin line with Factory rules. Access shall be provided to cranewalkway through staircase from operating floor in addition to cageladder at two ends. Bottom level of roof framing shall be decided bythe crane clearance required duly taking into account clearancerequired for mounting light fixtures. Roofing shall be of arch typewith insulated metal sheets supported over steel purlins andtrusses. Over the roof, Exhaust system monitor shall be providedwith. Roof of the monitor shall be with Double skin Pre-coatedinsulated metal sheets. Side cladding shall be with translucentsheets.

5.4 Cladding shall be of brick wall supported on concrete encased steelwall beams, up to a height of 500 mm above finished floor level andon gable ends as well as on the transformer side. Walls in front oftransformers shall be of adequate thickness and height to satisfyfire rating as per LPA regulations. Cladding beyond the abovelevel shall be of permanent colour coated fixed double skininsulated wall cladding using galvalume sheet with 50mm thick rockwool insulation system of approved colour.

5.5 Windows shall be light tinted glazed powder coated aluminiumsliding windows. However, in areas where cladding is of sheetingand in other inaccessible areas windows of fixed glazing in powdercoated aluminium frame work shall be provided. All the doors onexternal walls shall be of double plate flush steel doors. Forequipment entry into the service bay specially designed steelsliding / cum folding / rolling shutters shall be provided withappropriate operating mechanism. Provision shall be made for the


24/130



SHEET 13 OF 40

ISSUER0

TITLE


easy removal of the condenser tubes by providing a rollingshutter/space for removal as required.

5.6 Staircases protected on all sides with fireproof enclosure shall beprovided to satisfy LPA regulations. All the doors leading to theinside of the power house from staircase shall be automaticallyclosing fire proof door satisfying LPA regulations. Access cageladders shall be given to Turbine building roof.

5.7 Roof shall be provided with elastomeric water proofing membrane.UPVC rain water pipes shall be provided to drain off rain waterfrom roof. The rain water pipes shall be suitably hidden from thefacade.

5.8 The RCC floors shall be provided with proper drainage. Catch pitwith CI grills shall be provided near the internal column in a regularpattern and the floor shall be sloped towards the catch pit byvarying the thickness of the bedding concrete for the floor finish.Catch pits shall be at the same co-ordinate for all floor levels. 80NB HDPE / DI / RCC pipes conforming to relevant IS shall beprovided to carry the drainage down. The pipes shall be clampedon to the intermediate column. Sumps shall be provided in groundfloor to receive the water. Proper drainage arrangement shall beprovided in the ground floor by means of RCC gravity channelswith galvanised MS grills on top. The drainage shall be led tosumps from where the water shall be pumped to plant drainagearrangement. Around equipment liable to frequent drainage,concrete kerb shall be provided to isolate the area and water shallbe led through sump and channels to the floor drainage system. Oilwater separator should be provided as required to isolate oil fromthe drainage water where the water is mixed with oil.

5.9 In operating floor the design live load shall be painted on the floorsprominently showing the extent of the area where such loading ispermitted.

5.10 Wherever openings are provided in the floor for handling of

equipment using EOT cranes such openings shall be covered withgratings provided over removable steel beams.

5.11 Expansion joint shall be provided in the building to satisfy therequirements of IS: 800 and IS: 3414

5.12 Foundations for major equipment like gas turbine and steamturbine generator and boiler feed pump shall be of conventional


25/130



SHEET 14 OF 40

ISSUER0

TITLE


frame / block type RCC foundations and shall be isolated from thebuilding frame work.

6.0 CONTROL ROOM BUILDING

6.1.1 The control room building shall be three storied RCC framedstructure. Ground floor houses cable distribution room and alsospace for cable trays, entrance hall, ventilation chiller room,ventilation shaft and battery room. The building has to be providedwith an elevator approachable to all the floors. The intermediatefloor shall house in addition to the switchgear room, administration,space for pantry, copier and drawing storage. The second floorshall house the main control room, computer room, electroniccubicle room, additionally; space also has to be provided for the

conference room. Separate and adequate number of men andladies toilet cum wash rooms shall be provided for all the floors.

6..1.2 Most of the areas except for the area in ground floor shall be airconditioned. Hence clear head room below beams shall bedesigned to run A/C duct above false ceiling. Level of false ceilingmay be 3000 mm in all air conditioned areas including controlroom, computer room, computer and electronic cubicle.

6.1.3 Main entrance of control room shall be provided with air locked lobbywith automatic closing sliding doors. Lobby shall be formed ofanodised aluminium framing with toughened sheet glass of suitablethickness as approved by the Engineer-in-charge.

6.1.4 False ceiling shall be designed aesthetically, properly arrangingsupply air diffuser, return air grill, fire protection sprinklers and lightfittings.

A COMPONENTS OF CONTROL ROOM:

6.2 Designer False Ceiling will be made of Molded FiberReinforcement Plastic/Acrylic Solid Plastic. Overall look of theceiling shall be technical.

Note: In all the above type of ceilings, cutouts of AC vents &lighting fixtures can be easily performed without using any specialtool. Type of Ac diffusers shall be square or grill type depending onthe design of the ceiling.


26/130



SHEET 15 OF 40

ISSUER0

TITLE


6.3 Vitrified Flooring

Vitrified tiles for flooring shall be matt finished / semi glossy finishedwith non slip type. All tiles shall be decorative type of approvedshade, pattern, texture and design and of approved manufacturer.The sizes of the vitrified tiles shall generally be 600x600 mm.Pigments to be admixed with mortal for grouting the joints shallconform to Table - 1 of IS: 3114. The tiles shall be laid over acoating of approved neoprene based adhesive (as permanufacturer's specification) laid on base floor/ wall plaster. Thejoint of the tiles shall be 3mm uniformly by using plastic spacer withcement paste (white cement and pigment conforming to IS: 2114,Table - 1) matching the shade of colors. The tile work shall be

suitably cured. The tiles should be easy to clean and maintain.Color to be approved by the owner and consultant. The materialshall require minimum / no maintenance at all and can be easilycleaned whenever required.The type and design of tiles used shall be easily available in themarket in small quantities also.Replacement of tiles shall be easy and should not require special

tools except vacuum lift which are easily available.

6.4 Aluminum Panel Partition

Partition will be 4mm thick combination of perforated & non

perforated aluminum panel sheets. Inside sheet, Low DensityPolyethylene Inner Layer Sandwiched between Aluminum Foil onboth sides to provide high tech and industrial look.

Properties:-

1. Good sound insulation reduces unwanted vibration noise.2. Resistance to extremes of weather exposure and temperature.3. High impact resistance.4. Very low coefficient of expansion.5. Can be cleaned using detergents.6. Superior flatness ideal of creating smooth, monolithic surface

7. Resistance against Fire (Class A)8. Water and Corrosion resistance9. Thermal Resistance

The structure shall be made of combination of steel pipes andspecially designed extruded profiles. Partition material will be fittedon the structure in a curvilinear manner matching to the curve ofthe partition. Total thickness of the partition will be 100 mm.


27/130



SHEET 16 OF 40

ISSUER0

TITLE


Aluminum extrusion, the composite sheets, extruded slat walls etc.shall be pasted/joined on the structure with 3M tapes & 995 sealant

for better life. Structure will be filled with glass wool of 2 thicknessfor thermal and sound insulation.Partition shall have provision to mount 2x3 Large Video Screen

with complete integration to the curve of the partition. It shall haveproper framing and strength to hold itself as well as the screens.Partition shall have arrangement to mount two nos of monitors

one above other on right hand side of Large Video Screens. It shallbe properly mounted on flexible monitor arm properly flushed withthe partition.

6.5 Cladding

6.5.1 For Columns backside of LVS

Cladding shall be made of 12mm thick Gypsum Board and shouldhave Min. 80mm thickness. G.I. frame work in desired patterncomprising of 0.9mm thick studs and 0.5mm thick horizontalmembers (U shaped as per manufactured standard detailspecifications). J oints in the board shall be finished flush with fillers,finisher and primer to give a seamless finish and shall be finishedwith three coats of plastic emulsion paint of approved make andshade.

6.5.2 Aluminum panel Cladding

Cladding shall have 50 mm thickness with specifications similar tothe partitions (serial no. 6.4)

6.6 Glass Partition

Full glass wall partitions will be made of 12mm Toughened roundbent glass with frameless structure. Proper structure shall be madeto ensure the fixing of glass on ceiling and flooring. No verticalstructural members shall be visible. Safety film shall be applied onone side of the glass to avoid shattering and on the other sidedecorative film shall be applied to improve the aesthetics of thecontrol room.

6.7 Light Fixture

Light Fixture shall be choosen according to Lux Level Calculation.Diffused luminaries: Complete with slim open type with electronicballast and accessories pre-wired up to terminal block in the control


28/130



SHEET 17 OF 40

ISSUER0

TITLE


gear chassis Conforms to IS 10322 / Part 5/ Sec.1: 1987.Perforated cylindrical shaped diffuser in white powder coated steel

incorporating opalescent polyester foil. Suitable for modular ceilingsystems of 2' X 2'Direct luminaries: Slim open type with electronic ballast andaccessories are pre-wired up to terminal block, Conforms to IS10322, Part 5, Sec 1 / 1987. Specially designed satin finishaluminum reflector, CRCA white powder coated rim and housingLED light: To be used as design element. It will be a continuous railwith 25,000 Hr life and multi color changing option using a remotecontrol. LED light shall be very flexible and can be cut / coupled atsite to the required length. LED light shall be used for easy creationof customized LED solutions containing LED strings, driver, RFremote and synchronizer.

Emergency Light: Approx 10% will be emergency light with inbuiltAC to DC convertor. It consists of an electronic emergency unit withNickel cadmium battery which drives a single 36/40W FTL lamp at15-16% light output for 2 hrs during power failure. The chargingtime for battery shall be 24 hrs. Housing shall have stove enameledin reflector white from inside and outsideAlso provision for Path lighting and signage shall be taken care off.

6.8 Glass Doors

Special frameless patch fittings (Germen fittings) for doors shall be

with door spring, locking arrangement and both way S.S. handles.Glass Thickness: 12mm Toughened. Width of double glass door:1500 mm Width of single glass door: 900 mmGlass doors shall consist of glazed surfaces (with design etchingfilm having corporate emblem and other design).

6.9 Meeting Room (inside the control room)

Meeting room shall be made using full height glass on the controlroom facing side. It shall have an area of 400 sq feet. It shall beused for emergency/daily meeting for approx. 6-8 people.Conference table shall be made with similar material as that ofcontrol desk for better aesthetics and similar appearance. The finishand the material selection shall be similar to the main control room.Design and material shall compliment the control desk.


29/130



SHEET 18 OF 40

ISSUER0

TITLE


6.10 Plastic Emulsion Paint

The surface shall be free from dust, dirt, grease and other foreignmatter and shall be smooth by sand papering. The primer coat shallbe alkali resistant primer or emulsion primer and shall be samemanufacture as plastic paint. After the Primer coat, the basepreparation shall include applying two or more coatings of oil basedputty in paste form. After the base preparation coats have dried,surface shall be lightly sand papered. The plastic emulsion paintshall confirm to IS: 5411 (Part-I).It shall be combination of Oikos and Royal Play paint.

B) General specifications for vicinity area

6.11 False Ceiling

6.11.1 Metal Perforated False Ceiling

The Metal Perforated False Ceiling shall consist of:-(A) Hot dipped galvanized steel sections grid work made of:-(i) Main T- shaped runner of size 25mm x 35mm x 0.33mm thickwith double rotary stitching @ 1200mm c/c.(ii) Cross T runner of size 24mm x 30mm x 0.25mm thick x 1200mmlong rotary stitched to main tee.(iii) Cross T runner of size 24mmx 25mm x .25mm thick x 600mm

long rotary stitched to above mentioned (under ii) cross member.(iv) Perimeter angle of size 22mm x 22mm 0.45mm thick fixed allaround the wall. With these a grid of 600mm x 600mm shall beobtained. The grid shall be suspended by means of 4mm dia MSwire, 6mm thick MS cleat of 25mm x 25mm section, dash fastenersand level adjustors. The overall grid system shall be rigid by selflocking joints, in accordance with false ceiling patterns, perfectlyleveled and aligned at desirable height as per drawings. Exposedsurfaces of the grid work shall be pre finished in baked polyesterpaint and shall be chemically cleaned. Necessary cut outs for A.C.diffusers, lighting fixtures shall be provided by means of additionalmain/ cross tee members.

(B) Pre- finished/ coated metal perforated ceiling tiles (withacoustical fleece) 15mm thick (of size 600mm x 600mm / 600mm x1200mm) with durable regular edging and having followingproperties:-i) NRC (Noise Reduction Co-efficient) value of min.0.50, ii) Light reflectance value of min. 60%, iii) Fire performanceconforming to Class A, iv) Humidity Resistance at RH100. v) Hotdipped galvanized steel vi) Baked Polyester Paint surface The false


30/130



SHEET 19 OF 40

ISSUER0

TITLE


ceiling tiles shall be installed over supporting G.I. grid work as pre-manufacturers recommendations and specifications. The work

includes providing necessary accessories, hardware, finishing etc.complete. The finished false ceiling shall be perfectly leveled andaligned, at desired height as per drawings.

6.11.2 Gypsum Board False Ceiling

Gypsum Board false ceiling work shall consist of:-

A. GI Grid System made of:-GI intermediate channels (mainrunners) shall be 0.9 mm thick, of size 45 mm and with twoflanges of 15 mm each. The intermediate channels shall besuspended from the ceiling @ 1200 mm with 25 max 0.5 mm GIhanger bolted to the channel and fixed to the ceiling (by meansof bolting to GI cleat fixed to the ceiling with dash fasteners). i )GI channel shaped ceiling sections (cross runners) shall be 0.5mm thick having a knurled Web of 51.1 mm and two flanges of26 mm each with lips of 10.5 mm. The ceiling sections shall befixed to the intermediate channels in perpendicular direction at450 mm C/C with the help of connecting clips. ii) Wall channelsshall be made of 0.5 mm thick GI of size 27 mm, one flange20mm and the other 30 mm. Wall channels shall be fixed toperipheral walls by raw plugs/ dash fasteners @ 450 mm c/c. GIgrid system for supporting gypsum board false ceiling tiles shall

be perfectly leveled, aligned at desired height in accordancewith false ceiling pattern.

B. Gypsum board Tiles: - Gypsum board tiles shall be 12mm thick.The gypsum board used for tiles shall conform to IS: 2095 andshall have following properties: -i) Thermal Conductivity - 0. 16W/mk ii) Thermal Resistance- 0.08 Sq.M K/W iii) FirePropagation

C. Index of performance - Not exceeding 12 and a sub index notexceeding 6 (When each side is tested separately to BS 476,Part -6).

D. Surface spread of flame- Class 1 (both sides) as per test to BS476 Part -7). The Gypsum board shall be screw fixed to theunderside of false ceiling grid system with 12.5mm dia dry wallscrew @ 230 mm C/C by drilling machine. J oints in the boardshall be finished flush with fillers, finisher and primer as permanufacturer's recommendation to give a seamless finish andshall be finished with two or more coats of plastic emulsion paintof approved make and shade.


31/130



SHEET 20 OF 40

ISSUER0

TITLE


6.12 Partitions

6.12.1 Gypsum Board Partitions (Optional)

This shall consist of:-

(A) G.I Framework in desired pattern comprising of 0.9mm thickstuds and 0.5mm thick horizontal members (u-shaped as perapproved manufacturers standard details, specifications etc.;screwed to each other) @ 610mm c/c both ways. One base channelshall be fixed to floor and one to RCC beam/ slab by means of 6mmdia, 112mm long dash fastener with suitable washer. i) ThermalConductivity - 0. 16 W/mk ii) Thermal Resistance- 0.08 Sq.M K/Wiii) Fire Propagation

(a) Index of performance - Not exceeding 12 and a sub index notexceeding 6 (When each side is tested separately to BS 476, Part -6).

(b) Surface spread of flame- Class 1 (both sides) as per test to BS476 Part -7).

Partitions shall be double skin type and the Gypsum boards shall bescrew fixed on both sides of G.I. Framework with 12.5mm dia dry

wall screws @ 230 mm c/c by drilling machine. J oints in the boardshall be finished flush with fillers, finisher and primer as permanufacturer's recommendation to give a seamless finish and shallbe finished with two or more coats of plastic emulsion paint ofapproved make and shade. Necessary cutouts for electrical, AC,return air etc. and other fixtures shall be provided as required in theframework as well as boards. For glazed portions within thepartitions, G.I. Frame spacing shall be adjusted for exact location ofthe glazing with additional Teakwood frame to be provided. Glassshall be 6.3mm laminated safety glass conforming to I.S:2553/5.5mm plain glass conforming to I.S:2835 and shall be fixed withputty and wooden beadings.

6.12.2 Aluminum Panel Partition (Optional)

Same as Clause no 6.4

6.12.3 Glass Partition (Optional)



32/130



SHEET 21 OF 40

ISSUER0

TITLE


6.12.4 Laminated/ Pre laminated Board Partitions (Optional)

Partitioning work shall consist of:-

(A) MS frame made of horizontal & vertical members of 18 SWG,52mm x 38mm MS hollow box sections. The members shall bewelded to each other at maximum 600mm c/c both ways. Theframe shall be fixed to the floor/ ceiling/wall with suitable dashfasteners/ GI raw plug, screw and washers & 300mm maximumc/c. The members shall be provided with one coat of approvedquality red oxide zinc chromate primer. The frame-workarrangement shall be in accordance with the pattern for partition

including doors/windows etc.

(B) Boards for partitioning (12mm thick) made of:Medium Density Fiber (MDF) Boards (manufactured from agrobased lingo celulosic fibers conforming to IS-12406, exteriorgrade bonded with synthetic resin conforming IS: 848, BWPtype and categorized as class-I for `Surfaces of very low flamespread' as per IS-1642) pre laminated in approved shade andtexture/ laminated with 1.0mm thick laminate of approved make,shade and texture. Partitions shall be double skin type withboards fixed on both sides of the framework. Frame work alongthe edges shall be concealed with panel boards. Necessary

cutouts for electrical, AC, return air etc. and other fixtures shallbe provided as required in the framework as well as boards. Incase of pre laminated boards the same shall be fixed to MSframework in 600mm wide panels (with 10mm vertical groove)with a 40mm x 3mm MS Flat already fixed to boards frombehind at edges @ maximum 500mm c/c and then MS flatsscrewed to framework through 10mm groove. Horizontalgrooves at skirting level lock rail level, door top level and asrequired shall be provided. All these grooves shall be filled withteakwood fillet/ gola. Where 1.0mm lamination over boards isprovided, the same shall be fixed to MS framework in desiredpattern. For glazed portions within the partitions, M.S. Framespacing shall be adjusted for exact location of the glazing withadditional Teakwood frame to be provided. Glass shall be6.3mm laminated safety glass conforming to I.S:2553/ 5.5mmplain glass conforming to I.S:2835 and shall be fixed with puttyand wooden beadings.


33/130



SHEET 22 OF 40

ISSUER0

TITLE


6.13 Cladding

6.13.1 Aluminum Panel Cladding

Cladding shall have 30 mm thickness with specifications similar tothe partitions. In lobby thickness of aluminum panel will be 3mm(instead of 4mm). Perforation shall not be done in this area. Designand look of paneling shall be much simpler than that of control roomand conference room. Cladding shall be aesthetically appealing andshall give technical look. (For general specification see serial no.7.2.2)

6.13.2 Gypsum Cladding

Cladding shall be made of 12mm thick Gypsum Board and shouldhave Min. 80mm thickness. G.I. frame work in desired patterncomprising of 0.9mm thick studs and 0.5mm thick horizontalmembers (U shaped as per manufactured standard detailspecifications).J oints in the board shall be finished flush with fillers, finisher andprimer to give a seamless finish and shall be finished with threecoats of plastic emulsion paint of approved make and shade.

6.14 Light Fixture


6.15 Doors

6.15.1 Glass Doors


6.15.2 Flush Doors

Flush door shutters shall be factory made and overall 35mm thickconsisting of solid core block bonded with phenol formaldehydesynthetic resin confirming to IS: 848. The shutters shall be faced onboth sides with 3mm thick water proof plywood finished with 1mm

thick laminate of approved shade and make. 35x20mm secondclass Teakwood lipping shall be provide all around the shutter bymeans of approved quality neoprene based adhesive and nailing@300mm (maximum). Teakwood lipping shall be French polished(lacquer finish) as per specifications. The shutter shall be fixed toframe by means of 125mm long MS butt hinges conforming to IS:1341 @ 600mm CC maximum.


34/130



SHEET 23 OF 40

ISSUER0

TITLE


6.15.3 Steel Wood Door (Optional)1. Door Leaf: Using high quality imported materials of steel board,on the beside is steel panel, between are wooden and honeycombpaper .There are characters are followings: no distortion, no crake,no painting; shockproof, damp-proof, environmental protection, anti-radiation and without formaldehyde and toluene; warm and heatinsulation, keeping from worm.2 Door Frame: Using full wooden (plywood) and covering with highquality macromolecule board; no distortion, no crake, environmentalprotection, and very beautiful as well. 3 Door Lines: Using highquality wood plastic to press together; water-proof. 4 Locks:Specialist security lock with more locking points. 5 Door leafthickness: 45mm~90mm. 6 Door frame depth: 80mm-280mm.

6.15.4 Fire Rated Steel Door (Optional)

Steel door shall be made of high quality galvanized steel. It shallhave 120 minutes fire rating. It shall be approved and tested as perBS:476-Pt20-22 & IS:3614 for all three tests with respect toStability, Integrity and Thermal Insulation by Central BuildingResearch Institute(CBRI), India. It shall have following features:1. Fully flushed construction

2. No visible weld

3. Vision panel

4. Fire rated glass with 120 minute fire rating

5. Shutter thickness Min. 50mm

6. Robust Structure

7. Pre-finished to receive all types of hardware

8. High level of aesthetics

6.16 Vitrified Flooring

Vitrified tiles for flooring shall be matt finished / semi glossy finishedwith non slip type. All tiles shall be decorative type of approved

shade, pattern, texture and design and of approved manufacturer.The sizes of the vitrified tiles shall generally be 600x600 mm.Pigments to be admixed with mortal for grouting the joints shallconform to Table - 1 of IS: 3114. The tiles shall be laid over acoating of approved neoprene based adhesive (as permanufacturer's specification) laid on base floor/ wall plaster. Thejoint of the tiles shall be 3mm uniformly by using plastic spacer withcement paste (white cement and pigment conforming to IS: 2114,


35/130



SHEET 24 OF 40

ISSUER0

TITLE


Table - 1) matching the shade of colors. The tile work shall besuitably cured. The tiles should be easy to clean and maintain.

6.17 Plastic Emulsion Paint

The surface shall be free from dust, dirt, grease and other foreignmatter and shall be smooth by sand papering. The primer coat shallbe alkali resistant primer or emulsion primer and shall be samemanufacture as plastic paint. After the Primer coat, the basepreparation shall include applying two or more coatings of oil basedputty in paste form. After the base preparation coats have dried,surface shall be lightly sand papered. The plastic emulsion paintshall confirm to IS: 5411 (Part-I).

6.18 Document Storage Arrangement

6.18.1 File/Book Rack

File/Book racks are aesthetically designed to match control roominteriors. It shall be constructed in such a way that it gives ease ofhandling. It shall have width-wise stack ability to suit ownerrequirements. It shall be provided with label holders. It shall havemultiple loading levels which gives more storage area. It shall haveheight wise adjustability of shelves to give more flexibility forstorage. It shall be made of pre-laminated MDF board.Dimension: 600mm x 450mm x 1200mm (WxDxH)

6.18.2 Optimizer

It shall be elegantly designed with ample storage space and sturdybody. It should hold everything without compromising on the bookof owners storage space. So there shall not be need to search foran additional space to place it. It shall have following features:1. Drive wheel with Firm grip for easy movement of the entire

optimizer.

2. Rotating lock with easy to identify lock/ unlock position ensuring

safety.3. Locking stiffener used for centralized locking ensures safety of

the important files and documents.

4. Labels to facilitate identification of files and documents.

5. Channels for smooth mounting. It has end stoppers to preventderailment

Dimension of each unit: 915mm x 475mm x 1980mm (WxDxH)


36/130



SHEET 25 OF 40

ISSUER0

TITLE


6.19 Locker Unit

Locker unit shall be made of high quality CRCA sheet with 7-tanktreatment. All lockers shall have ventilating louvers for aircirculation. Lockers shall be provided with lock and shall function asstandalone units or as a multi unit configuration Label holders shallbe provided for easy identification. It shall have 4 racks in a singleunit.Dimension: 380mm x 457mm x 1830mm (WxDxH)

6.20 Toilets

Toilets shall be provided at the switchgear room level and control roomlevel. Toilet floors shall be sunk and shaft shall be provided to route thesoil pipe. Sunken floor shall be provided with damp proofing treatment.All openings in floor for switchgear and other panels shall be sealedwith fire proof material after cables are connected.

Codes and Standards

The requirements of the latest published versions of the followinglisted publications shall be met:

NBC: National Building CodeNEC: National Electric Code

IES: Illumination Engineering Society: Lighting Handbook

7.0 HRSG GENERATOR/ DEAERATOR SUPPORTING STRUCTURE

7.1 Roof shall be provided with permanently colour coated metal sheet.Proper drainage of the roof shall be provided by means of guttersand down comer pipes.

7.2 Roof and Side cladding shall be by using double skin insulated wallcladding using galvalume sheet with 50 mm thick rock woolinsulation over 500 mm height brick wall (permanent colour coated

metal sheet). Extent of cladding has been descried elsewhere inthe specification.

8.0 STEEL CHIMNEY

8.1 The parameters for the chimney shall be designed based on theproperty of the gas burnt, quantity of gas generated and


37/130



SHEET 26 OF 40

ISSUER0

TITLE


composition of the flue gas. The chimney shall be of mild steelconstruction. Individual chimney shall be provided for each HRSG.

8.2 Chimney shall be provided with all appurtenances such as platform,cage ladder, aviation warning lights, lightening protection systemetc.,

9.0 HRSG GENERATOR AREA PAVING

9.1 Entire steam generator area from the gas turbine building up to theend of stack shall be provided with RCC paving over rubble soling.

9.2 Paving shall be carefully planned such that maintenance accessroads of minimum 4 m wide to all major equipment are available.

This area shall be designed for heavy loads similar to design ofroads. Such roadways shall be clearly identified with kerbs /painting. All drain / trench covers in these areas shall be designedto withstand truck loading.

9.3 The drainage of the entire HRSG area shall be properly planned.Network of RCC drains with RCC cover with slotted holes or MSgalvanised grills shall be provided covering the entire area whichlead the storm as well as process leakage water to the peripheraldrains, which in turn will lead to plant drainage system. Whereopen drains are not permitted under ground pipes may be providedin such case at all junctions and ends proper manholes shall beprovided to permit periodic cleaning of the pipes. All structural steelcolumn in the area shall be provided with encasing to a height ofminimum 200 mm above paving level and in addition the basesalso need encasing if base plate are below paving level.

10.0 TRANSFORMER YARD

10.1 Generator transformers, unit auxiliary transformers, servicetransformers and station transformers are located in switchyard.Transformers shall be founded on RCC foundations with rails onthe top and oil soak pits filled with hard stone aggregate. Burnt oil

pits are provided to collect leaked oil from the soak pit throughRCC pipes laid to slope. RCC blast wall / RCC frame with brickwall of adequate thickness and height to satisfy LPA regulationsshall be provided in between transformers as Fire barrier wall.

10.2 RCC foundations shall be provided with rail to transporttransformers out of transformer yard during maintenance. Entirearea shall be surrounded with 3 m high chain link fencing withgates. Where rails cross the fencing, fencing shall be made of


38/130



SHEET 27 OF 40

ISSUER0

TITLE


removable type to facilitate transport of transformer. Floors shallbe paved with plain cement concrete and shall be sloped towards

peripheral drains, which shall lead to a sump from which thedrainage is led through an oil water separator. The clear watershall be led to plant drainage.

11.0 SWITCHYARD

Extent of the Switchyard will depend on the layout of the switchyardwhich has been outlined in the Electrical section of this document.

11.1 Galvanised Steel Structure

The steel structure for the Switch yard shall be hot dip galvanised

structure with welded / bolted connections at shop and boltedconnection at site. All bolts and nuts shall also be galvanised.

11.2 Major steel structures are towers, beams, lighting masts etc. Theyare all of latticed construction. In addition supporting structure forequipment, such as isolator, lightning arrestors, etc shall also beprovided. These structures may be of tubular section or latticed asthe case may be. Towers, beams etc shall be trial assembled atshop, keeping in view the actual site condition, prior to dispatch toerection at site so that they can be conveniently pre-assembledbefore erection or conveniently assembled during erection.Lighting masts shall be provided with cage ladder. Where platformsare provided on lighting masts for mounting of lighting fixtures, theyshall have protection hand rails formed of galvanised section.Platforms shall be of galvanised gratings.

11.3 Trenches / paving / fencing

11.3.1 Trenches shall all be of RCC construction. Trench walls shall bedesigned to withstand a surcharge load of 1500 kg / sq.m.

11.3.2 Fencing around switch yard area shall comprise of PVC coatedchain link fencing.

11.3.3 The complete area within the fencing for switch yard/transformeryard shall be provided with a mild slope towards peripheral RCCdrains which in turn will be connected to the plant drainage system.

11.4 Switchyard Relay Room

11.4.1 Side cladding shall be of brick work and the main door to theswitchgear room shall be steel sliding door having adequate area to


39/130



SHEET 28 OF 40

ISSUER0

TITLE


admit switchgear. There shall be minimum two doors to theswitchgear room of flush welded steel type construction. Control

room shall have one swing type aluminium glazed double panel doorand one single panel door. Windows shall be steel glazed forswitchgear room with sheet glass. For control room if window isprovided the same shall be fixed with sheet glass. Main entrance ofthe building shall be of rolling shutter with appropriate rampapproach. Gypboard false ceiling shall be provided in the controlroom. Under deck insulation shall be provided above false ceilingand air washer room.

11.4.2 Roof shall be given access by means of cage ladder. An equipmenthatch shall be provided in the first floor with lifting beam to lift theswitchgear / control panel to the first floor.

11.4.3 Roof shall be given a slope of minimum 1 in 100 and shall beprovided with elastomeric water proofing treatment. Adequatenumber of UPVC rain water down take pipes conforming to IS:4985Class - 3 shall be provided.

11.4.4 Transformer yard, toilets, staircase etc shall be provided similar tocontrol room building.

12.0 OFF SITESWITCHGEAR ROOMS

Number of Switchgear rooms shall be decided based on thearrangement of various facilities. Switchgear rooms shall generallybe of single storey RCC framed structure with brick work for sidecladding. Other constructional details shall be similar to switch yardrelay room.

13.0 D.M PLANT INCLUDING RO PLANT13.1 Dimension and height of the building shall be decided based on

equipment layout and height of the vessels accommodated inside.The DM plant building shall be of a structural steel roof framing toresult in large column free space. Roofing shall be of RCC laid

over permanent colour coated metal sheet supported on steel truss/ beams. Column shall be of RCC and wall shall be of by doublewalled steel cladding. The cladding shall be as described elsewhere in the specification.

13.2 Adjoining control room and laboratory shall be provided in an RCCframed building with brick cladding. Control room and Switchgearroom shall have a cable vault below. Control room and laboratoryshall be air-conditioned. False ceiling shall be provided in this


40/130



SHEET 29 OF 40

ISSUER0

TITLE


area. Underdeck insulation shall be provided in the A/C area.Staircase in the control room complex shall be extended to the roof

also. Flooring in control room shall be of vitrified tiles. Toilets forladies and gents alongwith the wash rooms shall be provided in theground floor. In case a transformer yard is provided the wall infront shall be designed to satisfy fire rating as per LPA. Details/requirements of transformer yard shall be same as those providedfor control room building.

13.3 Floor where acid / alkali spillage are expected shall be isolated withRCC kerb and the flooring inside shall be of acid / alkali resistantbrick. The drains inside the building carrying acid / alkali mixeddischarge shall be provided with epoxy lining. Outside the buildingupto neutralising pit these drains shall be provided with AR brick

lining. Acid / alkali unloading and storage area outside the buildingshall also be provided with kerb with a sump inside. This area shallalso be provided with AR brick lining.

13.4 Neutralising pit shall be designed as a water retaining structurewith external damp proofing. Floor and walls of the pit shall beprovided with A.R brick lining. Ceiling as well as floor supportingpumps, pumping the clear water from neutralising pit shall be givenepoxy lining. DM water storage tank outside the DM plant shall besupported on sand pad with ring wall.

13.5 Walls inside the DM plant area shall be provided with chlorinatedrubber based painting. Main door shall be rolling shutter ofadequate size to permit entry of the largest vessel. All doors andwindows in the DM plant area shall be of powder coated aluminiumglazed type. Windows shall be of sliding type.

14.0 CONDENSER COOLING WATER SYSTEM

14.1 Cooling water channel and forebay.

14.1.1 RCC cooling water channel shall be of rectangular shape anddesigned as a water retaining structure. CW channel & fore bay

shall be of open water retaining structure. Depth of channel andwidth of channel shall match with the width and depth of the coolingwater channel from cooling tower. These branch channels shall jointogether and form a common channel leading cold water fromcooling tower basin to forebay of the pump house. Dimensions ofthe channel shall be decided on the basis of the quantity of water tobe carried by the channel. Floor of the channel shall be given amild slope to ensure necessary velocity of flow. The top of thechannel shall be kept at least 500 mm above ground level with


41/130



SHEET 30 OF 40

ISSUER0

TITLE


suitable galvanised M.S pipe hand railing on either side. Thechannel shall smoothly diverge and form the forebay in front of the

pump house. It is suggested that the bottom of the sump shall bekept flat and the difference in level between the channel and CWpump sump shall be made up in channel stretch before joining theforebay, using a slope of 1 Vertical to 5 Horizontal.

14.1.2 Depth of C.W sump shall be decided based on submergencerequirement of the C.W pumps at the lowest water level in thesump. Forebay shall be provided with cage ladder at four cornersconstructed of galvanised steel. Top of the forebay shall be kept500 mm above grade level and handrail of galvanised M.S.pipesshall be provided for the entire length on either sides. Water levelindicator (float type) shall be provided in the pump sump to

observe the depth of water.

14.2 C W Pump house

14.2.1 Dimension of the pump sump shall be so selected as to preventdead water areas, reverse currents, flow separation and eddies.Recommendations of British Hydromechanic Research Association(BHRA) and Hydraulic Institute Standards shall be followed. SurgeAnalysis shall be carried out. Pump sump shall be designed aswater retaining structure. Each sump shall be provided withstainless steel groove for inserting coarse screen, and stop logs.Grooves for stop log shall be provided before the screens. Thenumber of coarse screen shall be the same as the number of pumpsumps and the number of stop log shall be a minimum of two. Topof sump floor shall be kept same as that of the top of forebay. Thisfloor shall have openings for lowering and lifting of stoplogs andscreens. These openings shall be covered with galvanised mildsteel gratings when the screens are placed in position. Provisionfor handling of the screen and stoplogs shall be made. Sufficientpaved space shall be provided to keep the stop log when not in useand also for maintenance of screens. Galvanised MS hand railsshall be provided on 3 sides of the pump floor (sump roof). Eachindividual pump sump shall also be provided with a drain sump to

empty the sump for attending to maintenance of pump.

14.2.2 Proper rubber seal of minimum 14 mm thick shall be provided forthe stoplogs so as to avoid any leakage of water. Rubber sealprovided for the stoplogs shall be tested in accordance with therelevant Indian standards for water tightness and smooth operationin dry and wet conditions. The leakage through the rubber sealshall be measured and it should not be more than 5litres/min/meter length of seal under maximum head.


42/130



SHEET 31 OF 40

ISSUER0

TITLE


14.2.3 The pump house shall be composite RCC / steel structure with EOT

crane. Roof girders shall be of steel

Tech Spec for General Civil Works

Documents

Transcript of Tech Spec for General Civil Works