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1、SteelStructureConstructionSchemeⅠ.AbriefaccountofsteelstructureworkTherewillbe68tbridgetravelingcranesinproductionhall,weldingH-sectionsteelcolumnandbeam,structuralmainmaterialisQ345B,coldbendingsheetsteelZ-purlin,wallandroofcladdingaredouble-skinpressedsteelsheetandthermalinsula
2、tionwool.Ⅱ.CharacteristicofsteelstructureworkThesinglespanoftheworkis18m,theheightofsteelcolumnislarge,singleframeplaneexternalrigidityisverysmall,sothekeypointofsafetytechnicalcontrolistoguaranteethestabilityoutsidethestructuralplane.Takeout6steelcolumnsfromgridline9~14intheprod
3、uctionbuilding,insteadof52.5mspacetrussastrimmerbeamtosupporttheupperstructureandcraneload,theinstallationofthespacetrussisadifficultypointofthiswork.Ⅲ.FabricationofsteelstructuralmembersTechnicalpreparationspriorfabrication1.Studyandcheckthedesignworkingdrawingbeforefabrication,
4、makeshopdrawingandgetapprovalfromdesignerthenpreparematerialforfabrication.2.Makeaplanandprogramforfabricationasperthetype,quantityandmaterialofthestructuralmembers.3.Writeconstructiontechniquesandtechnicalmeasures,andtheequipmentregularexamineandmaintainplan,keepthemachineryingo
5、odcondition.Materialrequirements:1.Selectandconfirmthematerialfortheproject.2.Allkindsofmaterialshouldbewithqualityguaranteeandex-factorycertificate.Ifthereisanydoubt,samplingexaminationshouldbetakenaccordingtorelevantnationalstandard,onlywhenpassedtheexaminationmaterialinbatches
6、canbeused.3.Rustdegreeofsteelsurfaceshouldconformtothepresentnationalstandard.4.Jointingmaterial(weldingrod,solder,flux),highstrengthbolt,andcoating(undercoatandtopcoating)shouldbewithex-factoryqualitycertificateandconformtothedesignandnati
7、onalstandard.5.Iftheskinofweldingrodispeeledofforthecoreisrust,weldingfluxiswettingandagglomeratingormelting,thehighstrengthboltisrust/damagedortakenfromdifferentbatches,thesematerialsarestrictlyprohibited.6.Anti-corrosionpaintshouldconformtothedesignandrelevantstandard,andwithqu
8、alitycertificateandoperationinstruction.
