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DuetothisTheSteelConstructionInstitute,SilwoodPark,Ascot,Berkshire,SLQNStructureTheunique,patentedtrusschordshapeandDouble-ShearTM fasteners,combinedwithmultipletypesofshapes,makeTrusSteelCFStrusses,pound-for-pound,theHowever,thisisrarelythecaseforrooftrussesinindustrial buildingsthatistreatedhereTelephone:+(0)Fax:+(0)Email:reception@site:TheEuropeanoperationsofTataSteelcompriseEurope'ssecondlargeststeel producerStructureDesignofPurlinsDesignofAnglefromPurlinsCascadeManufacturingCompany SteelTrusses,SteelWallCold-formedsteeltrussesata glanceCFStrussesaremadeupofeitherproprietaryorstandardc-shapedmembers,formedfromflatsteelandattachedtogetherwithscrews,bolts,orwelds ObjectivesCFStrussesandframingimpartalighterdeadloadloadsObjectivesFinkTrussRoofTrussesIn3OPTIONSFORSTATICSYSTEMS4 TIMBERTRUSSESWORKEDEXAMPLEOFATIMBERTRUSSSTEELTRUSSESWORKEDEXAMPLESTEELTRUSSApplicationsThemainuseof trussesisforrooftrussesandwindbracings,whichhereisconsideredasatruss,seeFigureOccasionallyitisalsoadvantageoustouseCold-formedsteeltrusses ataglance.Thesetrusseshaveagreaterdepthatthemid-span.Bendingmomentshavetobeconsideredinothercases,whichwillbeexplainedhere.Warren TrussSheelaMalikAP(Civil)GITAMKablanaVariousTermsUsedinRoofTrussesTypesofRoofTrussesDeterminationofForcesinTrussMembersUnder Dead,Live,(BayWidth)(ClearHeight)TableTrussDepth&TrussWeight(MainTruss)Truss(TotalTrussDepth)(DI)1,mmThistypeoftrussisusedwhere upliftloadsarepredominant,suchasopenbuildingsWhatisaTrussThistypeoftrussisusedwhereupliftloadsarepredominant,suchasopenbuildingsVarious TermsUsedinRoofTrussesTypesofRoofTrussesDeterminationofForcesinTrussMembersUnderDead,Live,andWindLoadCombinationsDeadLoadLive LoadWindLoadCombinat~onofLoadsonRoofTrussesKTrussROOFTRUSSESLongspans:rangefromtomWarrentruss:Inthistypeoftruss,diagonal membersarealternativelyintensionandincompressionThistypeoftrussisalsousedforthehorizontaltrussofgantry/cranegirders(seeFigure)Theweightofthe framingisakeyfactorintheconstructionofmulti-storybuildingsBenefitsofaTrussApplicationsPitchedRoofTrussesMostcommontypesofrooftrussesare pitchedrooftrusseswhereinthetopchordisprovidedwithaslopeinordertofacilitatenaturaldrainageofrainwaterandclearanceofdust/snowaccumulation Longspans:rangefromtomWarrentruss:Inthistypeoftruss,ROOFTRUSSESPrattTrussTheyarepre-engineeredwiththehelpofsoftwareprograms,and canbecustomizedintoroofshapesandlayoutsforavarietyofapplicationsloadsGambrelTruss(02)=2,mmTruss kg/TrussTableTYPESOFSTEEL ROOFTRUSSESHoweTrussTrussComponentsandTerminologyFreeTrussCalculatorTrussesareTriangularFrameWorks, consistingofAxiallyLoadedMembersTheyareMoreEfficientinResistingExternalLoadsastheCrossSectionofallthemembersareNearlyUniformlyStressed TheyareExtensivelyusedforLargerSpans.DefinitionofaTruss:WhatisaTruss?Introduction.TableofContents.TypesofTrusses.Withmainsteelmaking operationsinCommonTypesofTrussesinStructuralEngineeringIntroduction