钢结构吊装方案

钢结构吊装方案钢结构吊装方案/钢结构吊装方案编号：PL-8710-CFOC-0012CSPCNanhaiPetrochemicalsProject—MaterialHandlingWarehousesCSPC南海石化项目-后处理仓库工程ConstructionMethodStatementForErection&InstallationofSteelStructure&MetalCladdingSystem钢结构吊装和压型钢板围护结构安装方案ProjectEPCContractor-ConsortiumofCCFG&HQCEC中建一局集团南海石化项目-后处理仓库工程项目经理部No.版次Date日期By编制人Chk’d审核人Status/状态AApr.18,2004TianChenyangChangYuezhouCODE2BMay,20,2004TianChenyangChangYuezhouRevised&re-submittedCJune,20,2004TianChenyangChangYuezhouCode1ContentChapter1IntroductionChapter2ScopeChapter3PurposeandresponsibilityChapter4SpecificationChapter5Methodstatementandinstructions5.1Constructionphilosophy5.2Scheduleofequipment&workforce5.3Workflowchartperinstallationrun5.4Jobsitelayout5.5LevelIIIconstructionprogressschedule5.6Steelstructureinstallation5.7Metalcladdingsysteminstallation5.8Fire-resistantpainting5.9InstallationsurveyChapter6ConstructionqualitycontrolChapter7ConstructionHSErequirementandexecution7.1Sitelayout&temporaryfacilities7.2Installationequipment&facilities7.3Competentpeopleforinstallation,rigging&hoisting7.4Fallprotection&workatheight7.5Anti-typhoon&anti-lightningmeasure7.6NightworkrequirementChapter8AttachmentsHighlightsofPMC’sCode2commentstoRev.BofthisMethodStatementonJune,08,2004Needtodescribesafetymeasuresandsketchdrawingonmobilescaffoldingstabilityatthestatusofworkandmovement.Strengthcalculationoflifelinebyqualifiedengines.Fallingobjectspreventionandroofworksafety.Chapter1IntroductionTheMaterialHandlingWarehousesofCSPCNanhaiPetrochemicalProjectinclude3separatebuildingsso-calledPolymerWarehouse(0120),DrummingStorageWarehouse(0121)andDrummingFacility(0122).AbagginghallwithhigherheadroomisarrangedinsidePolymerWarehouseandbaggingfacilitiesareequippedtoconnecttosiloarea.These3buildingsaredesignedaslight-weightsteelstructurewithenclosureofmetalcladdingsystemforroofandupperpartoffacade/wholeheightblastresilientreinforcedconcretewallalongsouthperimeterand2.5mhighmasonrywallalonganother3sideperimeter.Thefollowingsummaryprovidesbriefinformationaboutthedesign&constructionoftheworkrelatedtotheerection&installationofsteelstructureandmetalcladdingsystem.No.WorkItemsDescriptions1BuildingOverallDimension(unit:meter)0120#150W*380L*(6.3~8.7)H,7.5L*25Wcolumnspacing0121#53.3W*150L*(6.3~8.7)H,7.5L*26.65Wcolumnspacing0122#48W*90L*(6.3~8.6)H,7.5L*24Wcolumnspacing2TotalQuantitySteelmembers:4,000Tons(canopy450t,steelframes1750t,purlin950t,others850t)Metalcladding:100,000M2(typeV75200.75mmthick/75mmproglassfibreinsulation&stainlesswiremesh)3TypeofsteelmembersColumn/Beam:variedHcrosssectionfabricatedwithQ345Bplateandhigh-boltconnectionbetweenmembers.Purlin:C250*80*20*3mmQ235Bsectionsboltedtoframes@1570mmspacing4FirePaintingGJ-B/JA60-2firepaintingsystem,0.5~2mmthickasperfirerate,topaintonjobsitebeforeerectionFireresistantrate:column2h,beam1.5h,purlin0.5h5SupplierofsteelmembersHuaYuSteelStructureFabricationCo.Ltd.Dongguan,GuangdongProvince6FabricationofcladdingpanelsFabricatedbysupplieronjobsitelaydownareawithBHPorequivalentsteelcoil(1000mmwide,AZ150)7ConstructiondurationMay52004~Oct.1520048Erection&InstallationAfterpropertrialwork,arrange2installationrunsfor120#,1runsfor121#and122#9InterfacesBlastwallconstruction,masonrywork,siloconstruction,buildinggroundingsystem,M&Einstallation0ShopcoatingforsteelmembersPrimerzincsilicateDFT75μm,IntermediateepoxyDFT100μm,TopcoatPolyurethaneDFT50μm1ConnectionsPrimaryconnection:grade8.8hot-dippedgalvernizedhighstrengthbolts,secondaryconnection:ordinaryboltsChapter2ScopeThismethodstatementappliestoallerection&installationworkofsteelstructureandmetalcladdingsystemincludingjobsitehandingover,surveycontrol,erectionofsteelstructuralmembers(column,beam,bracingetc.),installationofroof&wallmetalcladdingsystem,roofskylightpanels,roofventilationunitsetc.Theinterfacewithblastresilientwallconstruction/masonryworkforlowerpartofthebuildingfacade/buildinggroundingsystemshallalsobeproperlyconsideredandwell-coordinated.Chapter3PurposeandResponsibility3.1PurposeThepurposeoftheismethodstatementistocoverandspecifyproperlytheproposedmethodsandstandardappliedfortheworkandensurethatalltheworkparticipantsofCCFGclearlyunderstandhowtheworkisgoingtobeorganised&instructedtoproceedontherighttrackasperrequirementofspecification/procedure/HSEandmeettheconstructionobjectives.Allthefacilitiesandequipmentappliedfortheworkaredulyinspected/maintainedingoodcondition.Alltheerection&installationworkersaredulyinformedandprotectedasworkdevelops.Alltheinterfaceissuesrelatedaredulyco-ordinatedandintegrated.3.2ResponsibilityProjectConstructionManagerCCFG’sprojectconstructionmanagershallberesponsiblefortheoveralldevelopmentofconstructionactivitieswithinMaterialHandlingWarehousesincludingconcretewallconstruction,steelwork,M&Eworketc.,ensuringtheyareonrighttracktothesatisfactionofPMC&BSC.ProjectconstructionmanagershallresponsibleforcooperatingPMC/BSCoftheirroutinesupervision&audit.WithfullassistanceandinstructionofprojectHSEmanager,projectconstructionmanagershallleadtheinstallationmanger,controlmangerandqualitymanagerexecutingeffectiveteamworktoachieveandimproveprogressscheduleandbudget.Theprojectconstructionmanagershalldulyinvolveininternalinterfacesamongdisciplinesandexternalinterfaceswithothercontractors/sub-contractors/supplierstoavoidpossibleadverseimpactonconstructionobjectives.InstallationManagerCCFG’sinstallationmanagershallberesponsibletoprojectconstructionmanagerforjobsiteoveralldevelopmentofsteelinstallationworkincludingsteelstructuresiteassembly&rigging,fireresistantpainting,metalcladdingsystemsitefabrication&installation,roofskylight&ventilationunits.TheinstallationmanagershallassistprojectconstructionmanagertocoordinateinterfaceissueswithinMaterialHandlingWarehouses.Theinstallationmanagershall,togetherwithprojectHSEmanager/qualitymanagerandcontrolmanager,devotetoachieveandimproveHSE/quality/schedulegoalsbyproperlycontrol&instructofinstallationworkasperproposedmethodorprocedure.Theinstallationmanagershallbefullyresponsibleforleading&instructinginstallationpeople(cranedriver,equipmentengineer,riggers,signalman,welder,painter,electrician,scaffolderetc)toworkontherighttrackasexpected.ProjectQualityManagerCCFG’sprojectqualitymanagershallbefullyresponsible,onbehalfoftheEPCcontractor,fortheoverallqualitydevelopmentoftheproject.Qualitymanagershallberesponsiblefortheproperexecutionofprojectqualityassurance&controlplan.Thequalitymanagershallkeeptracingthecriticaljobprocedure/sequence,criticalinspection/acceptanceofinstallationwork.Thequalitymanagershallalsoofferadequateprofessionalassistance&instructiontoinstallationpeopletostrivetoexcellentteamwork.ProjectHSEmanagerThesteelinstallationworkisabsolutelycriticalworkwhichissignificanttoprojectHSErecord.ProjectHSEmanagershallbefullyresponsible,onbehalfoftheEPCcontractor,fortheoverallprojectHSEmanagement.HSEmanagershallberesponsiblefortheproperexecutionofprojectHSEplanespeciallyforinstallationrelatedissues.ProjectHSEmanagershall,togetherwithhisHSEengineers/supervisors,offerprofessionalassistanceandinstructiontoallparticipantsofinstallationontheirjobsequences/procedurestodevotejointlytoprojecttargetsofHSE/Quality/ProgressScheduleandBudget.ProjectHSEmanagershallleadprojectteamtoconduct&executeproperHSEmethodlikeHEMP,JHA,JSA,STARRT,ToolBoxMeetingetc.tokeepimprovingprojectHSErecord.ProjectHSEmanagershallofferprofessionalassistance&instructiontoplan/measuresofworker’sinduction&training,equipment&hoisting/rigging,nightshiftwork,specialPPE,fallprotection,workatheight,anti-typhoon,anti-lightningetc.ProjectControlManagerTheconstructiontimeforthisprojectatthisstageisquitetight,flowconstructionandparallel/inter-crossingconstructionsarefrequent.Well-preparedlevelIIIprogressschedule,weeklyscheduleanddailyworkschedulearesignificanttothesuccessofschedulegoals.Projectcontrolmanagershallberesponsiblefortheoverallprogressauditing,updating,diagnosing,andrecovering.Projectcontrolmanagershallofferprofessionalassistance&instructionsonprojectcontrolmattersofengineering,procurement,sub-contracting,installation&construction.Chapter4Specifications&ReferencesTheprojectClientCSPC,ProjectManagementContractorBSFandProjectEPCContractorCCFG&HQhaveissuedseriesofgoverningdocumentsregardingtostandards&specification,HSE,Procedures,siteregulationetc.DEP34.28.00.31-CSPC SteelStructuresDEP30.48.00.31-CSPC PaintingandcoatingfornewconstructionprojectsChineseStandards:GB50205-2001CodeforAcceptanceofConstructionQualityofSteelStructureGBJ17-88CodefordesignofsteelstructuresGB700 CarbonstructuralsteelGB706 Hot-rolledbeamsteelGB707 Hot-rolledchannelsteelGB1591 HighstrengthlowalloystructuralsteelsJGJ81-2002TechnicalspecificationforweldingofsteelstructureofbuildingEuropeanStandards:EN10025 Hotrolledproductsofnon-alloystructuralsteelProjectSpecifications&documentsSP-8310-0000-0001Civil/StructuralDesignSpecification Chapter5MethodStatementandInstructions5.1ConstructionPhilosophyInduetimeasperupdatedLevelIIISchedule,IFCdrawingapprovalandsupplier/subcontractorselection&PurchaseOrderkick-offareabsolutelysignificanttothesuccessofinstallationobjectives.CCFG&HQwillbewellorganizedanddevotetoachievethecriticaltargetsofthisschedule.PreventtheexposetorisksinallareasofitsoperationsonthebasisthatanyincidentcanbepreventedthroughcontinuousHSEimprovement.ProjectHSEobjectivesandregulationsshallbetoppriorityforthiserection&installation,HSEexcellenceissuretocontributetotheQualityControlandTimeSchedule.JHA/JSA&STARRTshallbedulyperformed.Riggersqualificationandriggingequipmentshallbewellmanaged&maintainedconformingtoPMC/CCFGrequirements.RegulationsonWorkPermit&StopWorkshallbestressedanddulyexecutedtomaintainexcellentprojectHSEstatusandsafeguardprogress.ThebestwaytoachieveagoodqualityoftheworksandassuretheCOMPANY,PMC,ourpartner,ourstaffandourworkmanpowerisastrongcommitmenttoISO9001QualitySystem.Qualityconcernseveryone,andeveryoneshallbeinvolvedtoachieveProjectQualitySystem.Internalinterfaceamongdifferentdisciplinesandexternalinterfaceswithothercontractors(mainlybaggingareaanddrummingfacility)areabsolutelyimportanttotheoverallobjectivesoftheMHWproject.Specialattention&co-ordinationshallbeinvolvedtrackingthewholeprocessofthisworktosatisfyPMC.Thetimescheduleforthisworkisrathertight,CCFGwillinvolveefficientmanagement/sufficientrecoursesandintroducemulti-shifts&multi-runs/milestonecashincentivestoexpeditetheworkJobsiteMasterLayoutPlanshallbeproperlyre-arrangedtoupgradeandintegrateeasytraffic/lay-down&sitefabricationetc.Erection&InstallationworkisthecriticalactivitytrackingbybothPMCandCCFGforjobsafetyandtimepurpose,andthisworkwillalsoexperiencethemonsoon/typhoonseason,specialmeasuresandresponseprocedureshallbewell-preparedandfollowedtoavoidanyadverseimpact.Roof&Wallmetalcladdingproproposedtobefabricatedonjobsitelaydownareatosavetransportandavoidlapconnection.Roofbeammemberswillbeassembledintosections(4sectionsfortypicalspanof120#)onthegroundofeveryspan,andtheninstalledtoerectedcolumnsforfurtherconnectiontonextsectionatroofheight.Fireresistantpaintingforsteelstructurewillbecarriedoutandcuredonsitebetweenstructuralspanstosavetimeandreducejobhazards.5.2Equipment&workforcescheduleWorkforceScheduleTradeRiggerInstallationScaffolderElectricalSignalmanDriverTotalNo.s88510255115EquipmentScheduleNo.EquipmentTypeUnitQuantity1Riggings&slings3~5tonset102Riggingbeam5tonpcs33Guycables/tagcable1/2”set604Lifeline1/2”m15005Chainpulley2~5tonset356Weldingmachine500Aset67GrindingtoolD125set108ElectricalwrenchM20~M30set69SafetyharnessStandardpcs8010Screwdriver/manualwrenchpcs5011Mobilecrane16ton412Mobilecrane25ton213Mobiletower8mset614CorrugatingmachineV7520set115ThermalcuttingtoolGascuttingset25.3WorkFlowChartperInstallationRunAcceptanceforthesteelmembers&foundationconcretework→Survey&groundlevelling→Steelcolumnslay-down→Firepainting→Erection/fastening&bolting→Roofbeammemberlay-down→Firepainting→Assemblyontheground→Beaminstallation/fastening&bolting(section1)→Beaminstallation/fastening&bolting(section2~6)→Acceptanceperspan→Firepaintingremedy→Installationofbracing&tensionrod→Installationofpurlins→Installationofmetalcladdingsystem(includinginsulation,translucentskylightpanel,roofguttersetc.)→roofventilationunits5.4MasterJobsitelayoutThejobsitelayoutplanshallbeadjustedtosuitthesteelinstructionworkandinterfaces.Thefollowingpointsshouldbeconsidered:Themainentrance&exitofthebuildingshouldbesetalongaxis9/F~GGand58/F~GGof120#,axis9/A~Wof121#,axis9/A~Nof122#.Thelotinsouthof122#andthelotinwestof120#shouldbe2mainstaging&storageareasincludingcladdingfabrication,propergroundpreparationandshelterarenecessary.Temporarypowersupply&drainagesystemshouldalsobearrangedinthese2lots.Trafficroadsinsideeveryspanwhilesteelinstallationisproceedingshallbeproperlyarrangedinveryspanconsideringsafesteelmembertransport/assembly/firepainting&riggingetc.Aftersteelinstallationiscompletedincertainspan,propertrafficarrangementshallbepreparedtomeettherequirementsofM&Einstallation,canopyfoundation,blastwallconstructionandpossiblesomemasonryworkwillbecarriedoutparalleltothesteelinstallation.Thetemporarypowersupplysystemshallbeextendedforbothinsidebuildingsandlay-downarea.OnegradeIIdistributionpanelwillbearrangedinlay-downareawestofaxis9120#warehouse.Jobsitelightingsshallbedulyaddedorimprovedtofittositefabricationandworkatheight.5.5LevelIIIConstructionProgressScheduleAccordingtotheupdatedlevelIIIprogressschedule,themilestonesofsteelstructureinstallationareasfollows:Polymerwarehouse(120#)May25,2004~Jul.25,2004Drummingstoragewarehouse(121#)Jul.10,2004~Aug.30,2004Drummingfacilitywarehouse(122#)Jun20,2004~Jul.30,2004Themilestoneofroof&wallcladdingsystemisasfollows:Jun.30,2004~Oct.15,20045.6Steelstructureinstallation5.6.1Fabrication&DeliveryThefabricationofsteelstructuralmembersisundertakenbyapprovedmanufacturer(supplier).Allsteelmembersshallbefabricatedoffsiteandcoatedbysupplieranddeliveredtojobsiteasperdeliveryscheduletoensuresmoothsiteinstallation.TheacceptanceundertakenbyCCFG/BSC/PMCbeforedeliverytositeismustandsignificanttotheproject.Documentsalongwithperdeliveryshallincludesteelmemberqualitycertificate,materialtestreports,materialqualitycertificate,NDEreport,WPS/PQR,highboltsqualitypackage,anti-corrosioncoatinginspectionrecord.5.6.2MethodStatementThemethodstatementoferection&installationshallbeproperlypreparedinaccordancewiththeprojectrequirementsandsubmittedtoPMCforreviewandapprovalpriortothestartofwork.Thismethodstatementshallspecifytherequirements&instructionofallrelevantinstallationactivityonconstruction,qualityandHSE.Issuesregardingtohoisting&rigging,technical&qualitycontrol,satisfiedHSEsituationandadverseweatherconditionshallbedulystressed.Detailjobprocedure&flowshallbewell-specifiedtoensurethatalltheworkparticipantsarewellinformedandinstructed.5.6.3Hoisting&riggingTheriggingliftsforsteelstructuralinstallationofMaterialHandlingWarehousesbelongtolightlifts.AccordingPMC’sprojectprocedure,lightliftsdonotrequireaformalriggingplanorcalculations.However,lightlifts,likeroofbeamsectionofabout30mlong,shallbeperformedfollowingprojectrigging&hoistingprocedure,underthedirectionofasuperintendent,aqualifiedcraneoperator,andaqualifiedriggerusingsaferiggingworkpracticesaspermethodstatement.5.6.4ColumnErectionSteelcolumnsshallbeproperlyinspectedandmarkedwithcolumnNo.(C1,C2,),andthentransportandlaydowntoitsproposedlocation,properlysupported200mmabovegroundandperformfirepainting.Whenthefirepaintingiscompletedandafterproperdryperiod,theerectioncanstart.Specialdesignedmovabletoweraccessscaffoldshallbeappliedateverycolumntofacilitaterigging,bolting,adjusting.Toensureliftingstability,safetyline(tagline)shallbeapplied.Toensureerectionstability,allcolumnsmustbeanchoredbyminimumof4anchorbolts.Soonaftertheerectionofeverycolumn,temporaryguycablesshallbeappliedtoensurestabilizationbeforesteelframeiscompleted,toavoidpossiblewindimpact.Therouteandperformanceofriggingequipmentshallbestrictlyinaccordancewithequipmentspecificationandmethodstatement.5.6.5BeamAssembly&installationFirst,beammembersarrivedshallbeproperlyinspectedandmarkedwithmemberNo.,thentransportandlocatetoitssupposedspangroundforfirepaintingpreparation.Afterfirepaintingiscompletedandpassedtheacceptance,beammembersshallbeassembledwithhighboltsaspersectionarrangementforbeaminstallation.Overheaddoubleconnectionmethodwillbeappliedforthisinstallation.Theriggingofbeamsectionshallbeasstrictasperoperationspecs.Safetyline(tagline)shallbeamustforeverybeamlift.Overheadassemblybyboltingtobeamsectionsorcolumnheadshouldbedulyperformed.Duringthefinalplacingofsolidstructuralmembers,theloadmustnotbereleasedfromthehoistinglineuntilthemembersaresecuredwithatleast4boltsperconnection.Properfastenedsteelcablelifelineshallbeintroducedalongeveryroofbeamafterdoubleconnectioniscompleted,tomakeeasysafetybelthangingandoverheadwalkwayonthetopofroofbeamforworkfollows.Onlyafterthebeamsectionsofeveryspanaredulydouble-connectedoverhead,thecolumnsinthisspancanbefinalbolted.Mobiletowerscaffoldshallbeappliedforoverheaddoubleconnectionofbeamsections.5.6.6HighboltingAlltheprimaryconnectionssuchascolumntobeamconnection,connectionofbeamsectiontosectionaredouble-connectionsbyhigh–strengthgripboltsofgrade8.8.Mandatoryinspection&testsonhighboltsshallbeproperlyexecutedbeforethetrialfastening(appendixBofGB50205-2001.ThefasteningofhighboltsgroupshallconformtothesequencerequirementofspecificationJGJ82-91(symmetricalfasteningofhighboltgroupperconnectionfromcentretosides).Inspection&acceptancedetailsofhighboltsshallbeasperprovisionofpart6/GB50205-2001codeforacceptanceofsteelstructure.5.6.7FieldweldingGenerally,almostnoweldingisneededtobeexecutedonsiteexceptforwasherplate(Q345B,24mmthick)weldedtocolumnbaseplate(Q345B,30mmthick)with12mmfilletsize,supportivesteel(Q235)forfirewaterpiping&electricalcabletrayweldedtomainstructureframe(Q345Bcolumnorroofbeam)with6mmfilletsize.AllthesiteweldingactivityshallfollowPMCapprovedprojectweldingprocedureandNDEprocedure.RelevantfieldweldingdocumentslikeWPS/PQRshallbedulypreparedandsubmittedforapprovalseparately.Theinspection&executionofweldingprocedureshallbethecrucialworkoftheinstallationteam.5.7MetalcladdingsysteminstallationTypeV7520roofcladdingsystemwillbeapplied.Thesteelcoilformetalcladdingwillbetransportedtojobsite.Thefabricationofmetalcorrugatedpanelwillbecarriedoutonjobsite.Thecorrugatingmachinewillbeinstalledinthelay-downareawestofaxis9of120#PolymerWarehouse.Detailfabricationplanwillbepreparedandsubmittedforreview&approvaloncetheoutstandingissuesaresolved.Beforeinstallationofpurlins,lifelineofeveryroofbeamshallbedulyfastenedandinspectedasperprocedurerequires.Thepurlinshallbeliftperbundletoitsproposedrooflocation,unwrapped,spread,2-end-boltedtoroofbeam.Tightrodforcertainlocationsshallbeinstalledandfastenedfollowingthepurlininstallation.Forinstallationofroofcladdingsystem,theprocessisexecutedandrepeatedrowbyrow，accordingtowidthofinsulationlayer/metalpanel/stainlesswiremesh，toandfromeaveorridge.5.8FireproofingPaintingFireproofingpaintingforsteelstructureshallbecarriedoutbyPMCapprovedsub-contractor;thissub-contractorshalloffermaterialsupplyandconstruction.Inorganicandsolvent-solublethin&expandingfireresistantpainting(GJ-B/JA60-2)shallbeusedinallsurfaceofsteelstructureincludingsteelcolumn,columnbracing,roofbeam,androof&wallpurlin.Thefireresistantratesforsteelmembersaredesignedas2mmthin/2-hourforcolumn&bracing,1.5mmthick/1.5-hourforroofbeam,0.5mm/0.5-hourforpurlin.Certaintrialexperimentsshallbecarriedoutbyfirepaintingsub-contractortoconfirmitsadequatestickiness,durabilityandsuitabilitytosubstratesurfacecoatingorgalvanizedsurface.AfterdetailinvestigationofMRandsitecondition,HSErequirementandworkefficiency,CCFGwouldproposetocarryoutpurlinfireproofingpaintingatoffsitepaintingshopanddeliverthepaintedpurlintosite.Fireproofingpaintingforcolumnandroofbeamshallbecarriedouteitheronthegroundbeforeinstallationoratoverheadaftersteelinstallation.However,nomatterwhichmethodwillbeapplied,HSEshallbethetopissuesandproperremedyshallbecarriedoutaftereveryinstallation.Whenunloadingofeverydelivery,steelmembershallbetransporttoitssupposedspanlocationonthegroundaspersteelmembergroundlay-outplan.Propersupportsshallbeadoptedtoliftatleast200mmabovegroundforeasypainting.Propersidesupportsshallalsobearrangedtoavoidpossiblecollapse.Propercoveringmateriallikeplasticmembraneshallbeusedtoavoidstainpollutionandrainwaterdamage.Thebrush-appliedpaintingmethodshallbeusedaftertrialpaintingdulyexecuted,andpaintingspecs/procedureconfirmed.5.9InstallationSurveyThecontrolpointsofelevation&axislinehavebeensetoutonthetopofconcretefootings.Properinspectionandacceptanceshallbeexecutedbythesurveygrouppriortoinstallation.5.9.1Columnvertical&elevationcontrolProjectsurveyplanshallbefollowedthroughoutthewholesurveyprocessofsteelinstallation.Thesurveyinstrumentsappliedaremaintainedingoodconditionaschecklistisdulyupdated.Surveyorsjointheteamarequalified,dulytrainedandinducted.Theplumbcontrolofcolumniscloselyrelatedtothatofthewholesteelframe.Theverticalcontrolofcolumnshallbeperformedpersinglecolumnspanafterspan.Theverticaladjustmentpersinglecolumnshallbeperformedinsteps.Referencelinesshallbemarkedin2directionsofcolumnsurfacebeforetheerection.Afterprimaryboltedandguyedin4directionsbyadjustabletiebolts,2levelsshallbeappliedtoadjusttheplumbing(vertical)precisionofcolumnbyobservingatdirectionsofrightanglesimultaneously.Thetopsurfacelevelofcolumnisquiteimportanttotheaccuracyofthewholesteelframe.Wheneverycolumnerectionstarts,thelevelofcolumnbaseplateshallbedulyadjusted&modifiedaccordingtoitsdesignleveltomeetdeviationlimits.5.9.2LocatingcontrolProjectsurveyplanshallbefollowedthroughoutthewholesurveyprocessofsteelinstallation.Axislineandcentrelineofcolumnbaseplateshallbedulysetoutonthetopsurfaceoffoundationconcretecolumnandpassedproperinspectionandacceptancepriortostartoferection,makingsureanchorboltsmatchthesecontrollinesasperstandardrequires,makingsurethecontrollinesontopsurfaceoffoundationcolumnmatchthesameonthebaseplateofsteelcolumninalldirections.Chapter6ConstructionQualityControl6.1GoverningStandardProjectstandard&proceduretogetherwith(GB50205-2001)ChineseCodeforAcceptanceofConstructionQualityofSteelStructure,(JGJ81-2002)Technicalspecificationforweldingofsteelstructureofbuildingisthegoverningcodeforthequalitycontrolofsteelstructureincludingsteelmaterial,fabrication,welding,bolting&fastening,assembly,painting,installation,claddingetc.6.2SitePerformanceThebestwaytoachieveagoodqualityoftheworksandassuretheCOMPANY,PMC,ourpartner,ourstaff,andourworkmanpowerisastrongcommitmenttoISO9001QualitySystem.Qualityconcernseveryone,andeveryoneshallbeinvolvedtoachieveProjectQualitySystem.Induceonoursubcontractorandsuppliersprojectrequirementsinordertogetfromthemthebestqualityforthevalueofcont