LOAD CONDITION LOAD COMBINATION

1 :LimitStateOf :LimitStateOfStrengthLOAD CONDITIONLOAD *(DL+ LL+ELo) *(DL+ ELo WL) *(DL+ LL+ELo) * *(DL+ ELo) * *(DL+ ELo+SL) *(DL+ LL +ELo) * SLLOAD CONDITIONLOAD *(DL+ LL) *(DL WL) *(DL SL) *(DL+ LL+ELo) *(DL+ELo) + * (LL WL) *(DL+ELo) + * (LL SL)LOAD CONDITIONLOAD *(DL+ LL+ELo) *(DL+ LL+ELo WL) *(DL+ ELo WL) *(DL+ ELo) * *(DL+ELo+LL SL) *(DL+ ELo SL) *(DL+ ELo) * *(DL+ ELe WL) *(DL+ ELe) * *(DL+ELt WL) *(DL+ ELt) * :LimitStateOfServiceabilityFollowingpoin tsshall benotedwhile doingtheload combinations:xFor structures which are supporting more than one equipment, only oneequipment shall be hydrotested atatimexWherewindloadisthemainloadacting onthestructure,noincreaseinthepermissibl e stress isallowedxEarthquakeisnotlikelyto occur simultaneouslywith 6 permissiblevertical deflectionforRCC membersshall be asper , , CONDITIONLOAD *(DL+ LL+ELo) *(DL+WL) *(DL+ SL) *(DL+ ELo) + *(LL WL) *(DL+ ELo) + *(LL SL)LOAD CONDITIONLOAD *(DL+ ELo) * *(DL+ ELe WL) *(DL+ ELe) *(DL+ LL) *DL+ * *(DL+ELt WL) *(DL+ ELt) PROGRAMSF ollowingcomputer program isusedforanalysisand :AllanalysisanddesignworkrelatedwithRCCo rstructuralsteelshallbe carried out usingSTAAD Pro :456shallbefollowedinthedesignofconcrete structuresunlessotherwise specified elsewhere in thisdocument forspecial.

2 800shallbefollowedinthedesignofnewsteels tructuresunlessotherwise specified elsewhere in thisdocument forspecial DESIGNOF RCELEMENTS(CONCRETE MIX)a)Type OfCement:Cementused in all typesofconcrete work(RCC, PCC & PlumConcrete)shall be factoryblended Portland Pozzolana Cement (fly-ash based), conforming toIS:1489 (Part-1).b)Reinforced Cement Concrete(RCC): Cement Concrete(RCC)forLiquid RetainingStructures:Unlessotherwisespeci fiedminimumgradeofRCCtobeusedforLiquidRe tainingStructuresanditsfoundationsshallb eM30conformingtoIS:456shallbeusedusing20 mm and down size graded crushedstone )Plain CementConcrete(PCC):Unlessotherwisespeci fied100mmthickPCCofmix1:4:8(byweight,usi ng20mmanddownsizegradecrushedstoneaggreg ate)shallbeprovidedunderallRCCfoundation s. ThePCC concreteshall extend100mmbeyond )PlumConcrete:UnlessotherwisespecifiedPl umconcreteofgrade1:3:6(using40mmanddowns izegradecrushedstoneaggregate)shallbeuse dasfillermaterialwhereverloosesub grade existsbyremoving theloose )Gunitting:Concretegradefor gunittingshall )Aggregates:AggregatesshallconfirmtoIS:3 83- Specificationforcoarseandfineaggregatesf romnatural sourcesforconcrete.

3 Strength Deformed(HYSD) Thermo MechanicallyTreated (TMT) steel barsofminimumgradeFe500D,confirming toIS:1786 shall be Steel round barsshall notbe used MinimumGroutThicknessTheminimum thicknessofgrout shall be25mmand not morethan , ,non-shrink(premixtype)grouthaving28-day sminimumcubecrushingstrengthof40 (1:2)groutshallonlybeusedunderthebasepla tesofcrossover,shortpipesupports( )andsmalloperatingplatforms( ) ,reductiongascompressor& srecommendedepoxygroutandguidanceformini mum thicknessshall be ReinforcementMinimumcover tomain reinforcement shall be asper Table of BoltsMinimumdistancefromthecentrelineoff oundation/anchorbolttoedgeofthepedestals hall be themaximumof thefollowing:a) Cleardistancefromtheedgeofthebaseplate/b aseframetotheouteredgeofthepedestal shall ) ) Cleardistancefromtheedgeofthesleeveoranc horplatetothe edgeofpedestalshall be ConcreteElementsThefollowingminimum thicknessshall befollowed:ThicknessReinforcedconcreteel ementsdesignedtoresistearthquakeforcesan ddetailedasperIS:13920 shall satisfythefollowingrequirements:Beams:a) b)c)Width of member shall notbelessthan depthratioofthe member shall be preferablymorethan Depth of themember shall notbemorethan of theclear :a)b)Minimumdimension of member shall not be lessthan shall notbelessthan WorksMinimuma)Footings(Alltypesincluding raft foundationswithoutbeams).

4 (Note:Taperedfootingsshall nothave thicknessless than150mm at not be less than300mm)350 mmb)Slab thicknessinraftfoundations with beam& slab mmc)Floor/ RoofSlab,Walkway,CanopySlab125mmd)Walkwa y(1:3:6)125 mme)Cable/Pipe Trench/LaunderWalls&Base Slab125 mmf)Parapet100 mmg)PrecastTrenchCover/FloorSlab75 mmh)Liquid Retaining/LeakProofStructureWalls& Base mmi)Underground pit /Reservoir(belowground water table)Walls& Base mmj)Underground pit (above ground water table)Walls& per soil ,steelsheds,piperacks,pipebridges, tank supporting platforms, stairs, ladders, walkways, crane girders, steel enclosures etc. will be carried outin accordancewith IS: ,fabricationanderectionoftheaboveworksha llbecarriedoutinaccordancewiththefollowi ngISCodesasapplicabletothespecificstruct ures, :800,IS:814,IS:875,IS:1893, , generallybe confinedtothemajoraxisofthe stacks continuously exposed to temperatures above 200 shall bedesigned for reduced stress as per Table 4 of IS: 6533 (Part-2).

5 The expected temperature ofsteel componentsshallnotbeallowed to exceed beusedforgantrygirder GradeStructuralrolledsteelsectionsshallb eofE250grade,qualityA/BR,semi-killed/kil ledand confirmingtoIS: ,V-Notchenergy> ,qualityA/BR,killed, Holdingdown Bolts(AnchorBolts)shall beoutofMild steel ofpropertyclass : conform toIS: shall be coarse conforming toIS:1367andIS: shall Tubes (Medium)asper conform to conform to IS:2062 Grade-A or specified otherwise ondrawings,all boltsusedforsteel to steel connectionsshallbe :1367 Part 3 Steel MaterialsMiscellaneous steel materialsshall conform tothefollowingIS codes:Specificationformildsteelandmedium tensilesteelbarsandharddrawnsteelwirefor concretereinforcement(GradeI) (Formildsteelbarsofanchorbolts,rungs,met alinserts,gratingetc.)Hexagonal head bolts,screws& nutsofproductGradeC PlainwashersSteel chequeredplatesHexagonal boltsandnuts(M42 to M150)IS:432IS:1363IS:2016IS:3502 ,washers,nuts, be as per relevantIS codes asmentioned Permissible StressesPermissible stressesin structuralmembersshallbe as specified in:IS:800 Hot rolled sectionsIS:801 Coldformedlight gaugesectionsIS:806 TubularstructuresPermissible stressesinBoltsshall be asspecified in:IS:800 Hot rolled :801 Coldformedlight stressesin Weldsshall be asspecified in:IS:801 Coldformedlight :816 Metal DeflectionThelimitingpermissiblevertical andhorizontaldeflectionforstructuralstee lmembersshall be as specified inTable-6, IS: ,Table-28ofIS800 considered asNormal inland, mild asper Table-29 (a)of IS.

6 ,Table-29, 4shallbeconsideredforstructuralsteelwork sfornormalinland, 4isconsideredtobeabout20yearsas per Table-29(a)of CriteriaBasicconsiderationofstructuralfr ameworkshallprimarilybestabilitysatisfyi ngrelevantIndian Standard CodesofPractice andspecificationsgiven Staircase,Ladders,HandrailsandGratingsa) Steel staircases for main approaches to operating platforms shall have channelsprovidedasstringerswithminimumcl earwidthof750mmandslopenotexceeding450. (withsuitablenosing) height shall beminimum )Allhandrails,staircasestepsandplatformg ratingsshallbehotdipgalvanizedasperspecs /IS ) abovethelowerlanding (maximum). the vertical exceedfive )Handrails,1000mmhigh,shallbeprovidedtoa llwalkways,platforms, (100mmx5mm)shallbeprovidedforallhandrail ing(exceptforstaircases). Spacingofuprightsshall be 1500mm (maximum).e)TypesofHand Railing shall be provided asunder:xForwalkways,platforms(exceptpla tformsupportedonvessels),andstaircases:T oprail, midrail and uprightshall be32(M)NB Class BMS pipesxForplatformssupportedon vesselstop rail shallbe 40(M)NB Class BMS pipesbutmid rail(flat 50x6)andupright (Angle 50x50x6)shall be ofstructural steelf) , )Galvanizationshallbedoneinaccordancewit hIS:2629andtestedasperIS:2633andIS:6745.

7 Quantityofzinc coating shall beminimum610 )ConnectionsWeldedconnectionsshallbeadop tedingeneral,exceptforisolatedcaseswhere boltedconnectionsarespecificallyallowedw ithpriorpermissionfromOwner/Owner , )Allconnectionsshallbedesignedforfullmom entcarryingcapacityoftheconnectingmember stogetherwith60%fullshearcarryingcapacit yforrolledsteelsectionsorfor theactualdesignforces, steel and plates, 80%of full shear carrying capacity shall be used for )Connection shall be designedas perSection 10of IS: )Thejointshall be able tosustain aminimumpulloutload allowable ) elsewhere in thisbid )Anyconnectionboltmainframingmembers( )shallbehighstrengthfrictiongrip bolt conformingtoIS:3757propertyClass )Connection boltsforminorconnection such ashand railingconnection/ladderandfixingoffloor gratingandgratingtread, :1367propertyClass ) )Minimumtwo nutsshallbe usedforall anchor REQUIREMENTFOR Foundationa)Design of machinefoundation shall be asper IS:2974 )The soil stress below foundation under dead loads shall not exceed 80% of theallowable soil )Theeccentricityofloadandfoundationareas hallbelessthan5%forblockfoundationand 3% of )Foundationshallbesodesignedthatnaturalf requencyofthefoundationsystemshallnot resonatewith thefollowing:i)Operating )Operating )2 x operatingspeed of the )Critical speed of machine (forcentrifugalmachine).

8 E)Natural frequency of foundation shall preferably be 20% away from the abovementionedfrequencies. However,amplitudes of vibration ofthefoundation block shall be checkedto bewithin ) )Theratioofweightofpumpfoundationtothewe ightofvibratingmachineshallbegreater than )Theamplitudeoffoundationshallnotexceed2 00micronasperIS:2974 orasindicatedbyvendor, and PipeTrencha) shall be at closer )Thesidesof trenchshallbe designedtoresist earthpressureandthefollowingloads:i) Cable load of155kg/m lengthofcablesupport + 75kgononetireat ) Earth pressure+uniform surcharge pressure of2T/m2(foroutsidethe building).iii) Earth pressure+uniform surcharge pressure of500kg/m2(forinsidethe building). Cabletrenchcovershallbedesignedforself-w eightoftopslab+UDLof500kg/m2and200kgat centerofspanon each )d)Cabletrench crossingtheroad ,adequatenumberofhumepipe/HDPE pipeshallbeprovidedand checkedforclass Aloading ) )Iftrenchesareoutsidethecoveredarea, trenchshall be suchthatthe surfacerainwater does not enter )All metal partsinside thetrench shall beconnected totheearthing )Trench shall befilled withfine )Vertical loadingTheverticalloadingshallbeasperthe inputsprovidedbythepiping,electrical& ,theclassofpipe, materialcontent andinsulation, if any, shallbetaken into consideration.

9 ,thematerialcontentshallbetakenas1/3rdvo lumeofpipefilledwith , , , , ( , , ).Inabsenceofdata,pipeoperatingloads(oth erthangas&steampipes) (emptyweight)& )Friction Force(Longitudinal andTransverse)Wherethepipesareofsimilard iameterandservicecondition,thefrictionfo rceateachtieroneveryportal,bothinlongitu dinalandtransversedirectionsshallbe15%of the design vertical loadingof thepipesforfouror more pipessupportedon ,teesupports,trestles,thefrictionalforce shallbetakenas30% and10% of the design verticalforce acting simultaneouslyintransverseandlongitudina ldirectionsrespectivelyor10%and30%ofdesi gnverticalforceactingsimultaneouslyonthe transverseandlongitudinaldirections concentrated loadat each )AnchorAndGuideForce(ThermalLoad) arisingfrom the )Cable Tray/DuctsandWalkwayLoadsThe estimated actual load from electrical trays and instrumentation ducts shall beconsidered at the specified locations, together with walkways, )

10 LoadsonIntermediateSecondaryBeamsInterme diateSecondaryateachpiping tierlevel shall be designedfor25%ofthe load onthemainportalbeams, )LoadsOnIntermediateSecondaryBeams(Longi tudinal Beams)Longitudinalbeamsateachtierlevelsh allbestrongenoughtosustain25% , )WindLoadsTocalculatewindloadonthepipesi nthetransversedirectionofpiperack,aproje ctedheightequalto(diameteroflargestpipei ncludinginsulation(m)+10%ofwidthofpipe rack(m)) endsofthetransverse the above coefficient, Cf forwindload onpipesshall be considered load on cable trays in transverse direction shall be calculated considering aprojected heightof(Heightoftray(m)+10%ofthewidthof the piperack(m)). Theforce co-efficient, Cf , forthecable traysshall beconsidered as oranyother movingvehicle soastoensure INTECHNOLOGYAND PRACTICESAll current developmentsinconstruction forISBLandOSBL areaswill be unlessmentioned StormWaterDrainagexDrainswithsufficientw idthanddepthshallbeprovidedtoroutethesto rmwaterfromnewproposedplant aswell astheroof sFormulaisusedtocalculatethevelocity&dis chargeinthedrainswithManning sroughnessco-efficientasn= A21S2v= X Xinm/sN P 3Q= VxAinm3/sxDrainsshallbeofBrickworkorRCCc onstructionbasedonthewidthanddepthofstor mwater drainrequiredCHAPTER 8 STATUTORY andstandardsare Electric Power(dedicatedfeeder)