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Tags: construction construction of buildings
Year: 2000
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ThesedetailsweredevelopedbytheLightGaugeSteelEngineers Association(LGSEA)fortheNorthAmericanSteelFramingAlliance (NASFA).Theyareintendedtoprovidedesignersandcontractorswithguid- anceondesign,detailing,andconstructionoflow-riseresidentialbuildingsthat utilizecold-formedsteelframingmembers.Detailscontainedinthisdocument wereselectedbasedontheircosteffectivenessatthetimeofthispublication. Effortshavebeenmadetopresentaccurate,reliable,andusefulinformation. Theconnectionsbetweenmembersareshownasscrewconnections;other typesofconnectionssuchaswelds,bolts,powder-actuatedfasteners,clinches, orpneumaticallydrivenfastenersareacceptable.Althoughitiscommonfor cold-formedsteelframingmemberstohaveweb"punchouts"forpassingbrac- ingorutilities,punchoutsareshowninsomedetailsonly.Punchoutsare acceptableandvaryinsize,configuration,andspacingdependingonthemanu- facturerand/ordesign.NASFAacknowledgesNaderElhajj,P.E.,forassem- blinganddraftingthedetails.SpecialappreciationisextendedtoKevinBielat oftheAmericanIronandSteelInstitute(AISI)andTimWaiteofNASFAfor theirassistanceandguidance.NASFArecognizesthefollowingLGSEAcom- mitteememberswhohelpedselectthedetailscontainedinthisdocument: DonAllen BLBConsulting TimWaite NorthAmericanSteelFramingAlliance ScottShaddix NicholasLaneContractors MikeWhitticar EnertechSystems,Inc. PatFord MatsenFordDesignAssociates,Inc. DonWilnau IndependentContractor Thematerialssetforthhereinareforgeneralinformationonly.Theyarenot asubstituteforcompetentprofessionalassistance.Applicationofanyinforma- tioncontainedinthisdocumenttoaspecificprojectorsettingshouldbe reviewedbyaqualifiedindividual.NASFAbelievesthattheinformationcon- tainedinthispublicationsubstantiallyrepresentsindustrypracticeandrelated scientificandtechnicalinformation,buttheinformationisnotintendedtorep- resentanofficialpositionofNASFAortorestrictorexcludeanyothercon- structionordesigntechnique.Additionaldesignanddetailing(i.e.,coordinat- ingwithothermaterials,materialspecifications)isrequiredformanyofthe detailsbeforetheycanbeincorporatedintoconstructiondocuments.Anyone makinguseoftheinformationsetforthhereindoessoathisorherownrisk andassumesanyresultingliability. Introduction....................................................................................................i TableofContents............................................................................................i ListofDetails................................................................................................ii Definitions....................................................................................................iv
DetailG1SchematicofTypicalSteel-FramedHouse..........................1 DetailG2C-ShapeConfiguration........................................................2 DetailG3TrackConfiguration..............................................................2 DetailG4JoistWebHoles....................................................................3 DetailG5StudWebHoles....................................................................3 DetailG6JoistWebHolePatch............................................................4 DetailG7StudWebHolePatch............................................................4 DetailG8In-LineFramingDetail........................................................5 DetailG9WebStiffenerDetail1..........................................................6 DetailG10WebStiffenerDetail2..........................................................6 DetailG11WebStiffenerDetail3..........................................................7 DetailG12TrackSpliceDetail................................................................8 DetailG13ScrewAttachmentDetail......................................................9 DetailF1FloorFraming....................................................................10 DetailF2FloortoFoundationConnection........................................11 DetailF3FloortoWoodSillConnection..........................................12 DetailF4FloortoLoadBearingWallConnection............................13 DetailF5FloorBearingonI-BeamConnection................................14 DetailF6LappedJoists......................................................................15 DetailF7ContinuousJoist..................................................................16 DetailF8FloortoI-BeamSideConnection......................................17 DetailF9JoistsSupportedbyShallowI-Beam..................................18 DetailF10JoistsSupportedbyDeepI-Beam......................................19 DetailF11FloorJoistsatInteriorBearingWall..................................20 DetailF12JoistsBearingonFoundationatOpening..........................21 DetailF13FloortoCMUWallSideConnection................................22 DetailF14WebStiffeneratLoadBearingWall..................................23 DetailF15AlternatePonyWallDetail................................................24 DetailF16CantileveredJoisttoFoundationConnection....................25 DetailF17CantileveredJoisttoWoodSillConnection......................26 DetailF18CantileveredJoisttoBearingWallConnection..................27 DetailF19CantileveredJoisttoWoodTopPlateConnection............28 DetailF20DoubleCantileveredJoists................................................29 DetailF21WoodDeckBalcony..........................................................30 DetailF22BeamSupportwithColumn..............................................31 DetailF23BeamSupport......................................................................32 DetailF24FloorOpeningDetail..........................................................33 DetailF25FloorHeaderandTrimmerDetail......................................34 DetailF26FloorBlockingDetail1......................................................35 DetailF27FloorBlockingDetail2......................................................36 DetailF28FloorBlockingDetail3......................................................37 DetailF29FloorBlockingDetail4......................................................38 DetailF30X-BracingDetail................................................................39 DetailF31BlockingConnectionDetail................................................40 DetailF32FloorSheathingConnectionDetail....................................41
DetailW1WallFraming......................................................................42 DetailW2WallFramingElevation......................................................43 DetailW3WalltoFoundation/SlabonGradeConnection1..............44 DetailW4WalltoFoundation/SlabonGradeConnection2..............45 DetailW5WalltoFoundation/SlabonGradeConnection3..............46 DetailW6WalltoFoundation/SlabonGradeConnection4..............47 DetailW7WalltoWoodSillConnection............................................48 DetailW8Hold-DownConnectionDetail1........................................49 DetailW9Hold-DownConnectionDetail2........................................50 DetailW10BoxBeamHeaderwithJackStud......................................51 DetailW11BoxBeamHeader..............................................................52 DetailW12Back-to-BackHeaderwithJackStud................................53 DetailW13Back-to-BackHeader..........................................................54 DetailW14L-HeaderDetail................................................................55 DetailW15SingleL-HeaderDetail......................................................56 DetailW16DoubleL-HeaderDetail......................................................57 DetailW17StudBracingwithCold-RolledChannel............................58 DetailW18StudBracingwithSheathing..............................................59 DetailW19StudBracingwithStrappingandSheathing......................60 DetailW20StudBracingwithStrappingandBlocking........................61 DetailW21StructuralSheathingFasteningtoWallStuds....................62 DetailW22ShearwallandDiaphragmDetails......................................63 DetailW23SheathedWallwithOpenings............................................64 DetailW24SingleStoryX-BraceDetail..............................................65 DetailW25TwoStoryX-BraceDetail..................................................66 DetailW26TwoStorySheathedWallDetail........................................67 DetailW27X-BraceDetail....................................................................68 DetailW28X-BracewithGussetDetail................................................69 DetailW29CornerFramingDetail........................................................70 DetailNL1Non-LoadBearingWallFraming......................................71 DetailNL2SillandHeadTrackConnectionDetail..............................72 DetailNL3CornerFramingDetail........................................................73 DetailNL4SlammerStudDetail..........................................................73 DetailNL5WindowOpeningFramingDetail......................................74 DetailNL6DoorOpeningFramingDetail............................................75 DetailNL7Non-LoadBearingOpening................................................76 DetailNL8Non-LoadBearingWallParalleltoJoist............................77 DetailR1RoofFraming......................................................................78 DetailR2JoistandRafterDetail........................................................79 DetailR3RoofFramingIsometricView............................................80 DetailR4HeelJointConnectionDetail..............................................81 DetailR5RidgeMemberConnectionDetail......................................82 DetailR6RidgeMemberwithCopedRafters....................................83 DetailR7RoofEaveandSoffitDetail................................................84 DetailR8RafterandJoistBridging....................................................85
DetailR9CollarTieatRafterDetail..................................................86 DetailR10RafterBraceConnectionDetail..........................................86 DetailR11RoofFramingwithWoodTailExtension..........................87 DetailR12WoodTrussBearingonSteelWall....................................88 DetailR13CollectorBlockDetail........................................................89 DetailR14Non-AlignedRoof-WallFraming......................................90 DetailR15HipBeam............................................................................91 FigureM1CabinetBlockingDetail......................................................92 FigureM2WiringandPipingInstallationDetail................................92 FigureM3StairFramingDetail............................................................93 FigureM4StairFramingDetail2........................................................94 FigureM5StairLandingDetail............................................................95 FigureM6WindSillDetails................................................................96 Anchor: Metalrod,wire,strap,orboltthatsecuresstructural members(suchasjoistsandtracks)toitsstructural supports(suchasfoundation). AxialLoad: Thelongitudinalforceactingonamember. Examplesarethegravityloadscarriedbycolumns orstuds. Blocking: Solidblockorpieceofmaterialplacedbetween structuralmemberstoprovidelateralbracingasin bridgingand/oredgesupportforsheathing. Bridging: Crossbracingorblockingplacedbetweenjoiststo providelateralsupport. C-Shape: Abasiccold-formedsteelshapeusedforframing members(suchasstuds,joists,headers,andrafters). Itconsistsofaweb,flange,andlip.Itisalsocalled a"C-section." Cantilever: Anextensionofrooforfloorframingmembers withoutadirectsupport. CeilingJoist: Ahorizontalstructuralframingmemberthat supportsaceilingandatticloads. ClipAngle: AnL-shapedshortpieceofmetal(normallywitha 90--degreebend).Itistypicallyusedfor connections. ContinuousJoist: Ajoistthatspansoverinteriorsupports. CollarTie: Bracememberusedtobraceroofraftersnearthe top. CrippleStud: Astudthatisplacedbetweenaheaderanda windowsill(orjamb)orawindowsillandabottom tracktoprovideabackingtoattachfinishingand sheathingmaterial. Diaphragm: Arooforfloorsystemdesignedtotransmitlateral forcestoshearwallsorotherverticalresisting elements.
Flange: ThepartofaC-Shapeortrackthatisperpendicular totheweb. FlatStrap: Sheetsteelcuttoaspecifiedwidthwithoutany bends.Typicallyusedforbracingandtransferof loadsbytension. FloorJoist: Ahorizontalstructuralframingmemberthat supportsfloorloads. GableEnd: Wherethetriangularupwardextensionofeitherside wallsorthefrontwallsofthehouseprovidetheend supportsforthetwoslopingroofplanes. Header: Ahorizontalbuilt-upstructuralframingmember usedoverwallorroofopeningstotransferloads abovetheopeningtoadjacentverticalframing members. HeelJoint: Theconnectionbetweentheroofrafterandthe ceilingjoist. In-LineFraming: Framingmethodwhereallverticalandhorizontal loadcarryingmembersarealignedwhenrequiredto properlytransferloads. JackStud: Averticalstructuralmemberthatdoesnotspanthe fullheightofthewallandprovidesbearingfor headers.Sometimesreferredtoastrimmerstuds. KingStud: Averticalstructuralmemberthatspansthefull heightofthewallandsupportsverticalloadsand lateralloads.Usuallylocatedatbothendsofa headeradjacenttothejackstuds. Lip: ThepartofaC-Shapethatextendsfromthe flangeattheopenend.Thelipincreasesthestrength characteristicsofthememberandactsasastiffener totheflange. MaterialThickness(steel):Thebasemetalthicknessexcludinganyprotective coatings.Thicknessisnowcommonlyexpressedin mils(1/1000ofaninch). Mil: Aunitofmeasurementusedinmeasuringthe thicknessofthinsteelelements.Onemilequals 1/1000ofaninch(e.g.33mil=0.033inch). Multiple-Span: Thespanmadebyacontinuousmemberhaving intermediatesupports. Non-LoadBearingWalls (non-structuralwalls):RefertoWalls. OverlapJoists: Twoormorejoistsextendingoveracommon supportwheretheendofonejoistisfastenedtothe endofanotherjoist. Overhang: Seecantilever. Punchout(orhole): Anopeninginthewebofasteel-framingmember allowingfortheinstallationofplumbing,electrical, andutilities.Apunchoutorholemaybemade duringthemanufacturingprocessorinthefieldwith ahandpunch,holesaw,orothersuitabletool. Rafter: Astructuralframingmember(usuallysloped)that supportsroofloads.
Ridge: Thehorizontallineformedbythejoiningofthetop edgesoftwoslopingroofsurfaces. Shearwall: Averticalwallassemblycapableofresistinglateral forcestopreventrackingfromwindorseismicloads actingparalleltotheplaneofthewall. SingleSpan: Thespanmadebyonecontinuousstructuralmember withoutanyintermediatesupports. Splice: Ajointatwhichtwopiecesarejoinedtoeachother. Span: Theclearhorizontaldistancebetweenbearing supports. StructuralSheathing:Thecovering(e.g.plywoodororientedstrand board)useddirectlyoverstructuralmembers(e.g. studsorjoists)todistributeloads,bracewalls,and generallystrengthentheassembly. Stud: Verticalstructuralelementofawallassemblythat supportsverticalloadsand/ortransferslateralloads. Track: Usedforapplicationssuchastopandbottomplate forwallsandbandorrimjoistsforflooringsystems. Atrackhasawebandtwoflanges,butnolips. Trackwebdepthmeasurementsaretakentothe insideoftheflanges. Truss: Anengineeredstructuralcomponentdesignedto efficientlycarryitsownweightandsuperimposed designloads.Thetrussmembersformatriangular structuralframework. Walls:LoadBearing: Wallsystemssubjecttoloadsthatexceed thelimitsforanon-structuralsystem(e.g. wallstuds). Non-LoadBearing: Wallsystemsthatarelimitedto10psf maximumlateral(transverse)loadand/or limited,exclusiveofsheathingmaterials,to 100poundsperlinealfootor200pounds maximumsuperimposedverticalloadper member(e.g.interiorpartitions). Web: ThepartofaC-Shapeortracksectionthatconnects thetwoflanges. WebOpening: See"Punchout." WebPerforation: See"Punchout." WebStiffener: Additionalmaterialthatisattachedtothewebto strengthenthememberagainstwebcrippling.Also calledabearingstiffener.