Cold-Formed Steel Framing Members

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COLD COLD-FORMED STEEL FORMED STEEL FRAMING MEMBERS FRAMING MEMBERS Dr. Roger LaBoube Curator’s Distinguished Teaching Professor and Director Wei-Wen Yu Center Wei Wen Yu Center for Cold-Formed Steel Structures
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Transcript of Cold-Formed Steel Framing Members

  • COLDCOLD--FORMED STEEL FORMED STEEL FRAMING MEMBERS FRAMING MEMBERS

    Dr. Roger LaBoubeCurators Distinguished Teaching Professor

    andDirector

    Wei-Wen Yu CenterWei Wen Yu Center for

    Cold-Formed Steel Structures

  • Goal of This PresentationGoal of This PresentationGoal of This PresentationGoal of This Presentation

    Provide overview of coldProvide overview of cold--formed steelformed steelProvide overview of coldProvide overview of cold formed steel formed steel framing members used in the construction framing members used in the construction industryindustryindustry.industry.

  • AISI S201: Product DataAISI S201: Product DataAISI S201: Product DataAISI S201: Product Data

    AA GENERALGENERALA.A. GENERALGENERALB.B. MATERIALSMATERIALSCC PRODUCTSPRODUCTSC.C. PRODUCTSPRODUCTSD.D. QUALITY QUALITY

    ASSURANCEASSURANCEASSURANCEASSURANCE

    This Standard definesThis Standard definesThis Standard defines This Standard defines framing member crossframing member cross--sections.sections.

  • AISI S201: Product DataAISI S201: Product DataAISI S201: Product DataAISI S201: Product Data

    Information Provided:Information Provided: Information Provided:Information Provided: Materials, Coatings and ThicknessMaterials, Coatings and Thickness Shapes and DimensionsShapes and Dimensionspp Designators and MarkingDesignators and Marking Tolerances and Quality AssuranceTolerances and Quality Assurance

  • MaterialsMaterialsMaterialsMaterials

    Referenced Standard:Referenced Standard: Referenced Standard:Referenced Standard: ASTM A1003: Standard Specification for Steel Sheet, ASTM A1003: Standard Specification for Steel Sheet,

    Carbon, MetallicCarbon, Metallic-- and Nonmetallicand Nonmetallic--Coated for ColdCoated for Cold--Formed Framing MembersFormed Framing Members

  • ThicknessThicknessThicknessThickness

    16 ga

    Gage is no longer used as the thickness designator

  • CoatingsCoatingsCoatingsCoatings

    Referenced Material Standard:Referenced Material Standard:Referenced Material Standard:Referenced Material Standard: ASTM A1003: Standard Specification for Steel ASTM A1003: Standard Specification for Steel

    Sheet Carbon MetallicSheet Carbon Metallic-- and Nonmetallicand Nonmetallic--Sheet, Carbon, MetallicSheet, Carbon, Metallic and Nonmetallicand NonmetallicCoated for ColdCoated for Cold--Formed Framing MembersFormed Framing Members

    Requirements:Requirements:Requirements:Requirements: Structural: G60 or equivalentStructural: G60 or equivalent

    NonNon structural: G40 or equivalentstructural: G40 or equivalent NonNon--structural: G40 or equivalentstructural: G40 or equivalent

  • ShapesShapesShapesShapes

  • ShapesShapesShapesShapes

    SS = Stud or joist= Stud or joistTT = Track= TrackTT = Track= TrackUU = Cold rolled channel= Cold rolled channelFF = Furring (hat) channel= Furring (hat) channelLL = Angle or L= Angle or L headerheaderLL = Angle or L= Angle or L--headerheader

  • Cold-Formed C-Shapep

    T i ll thi ti i d f ll t dTypically this section is used for wall studs, floor joists, roof joists or ceiling joists.

  • Product DesignatorProduct DesignatorProduct DesignatorProduct Designator

    600 S 162 - 54

    2 or 3 digit numeral indicating base metalthickness in 1/1000 inch (mils) (0.054)

    3 di it l i di ti fl idth i 1/1003 digit numeral indicating flange width in 1/100 inches (1-5/8), followed by a dash

    Letter indicating the type of product (Stud or Joist)Letter indicating the type of product (Stud or Joist)

    3 or 4 digit numeral indicating web depth in 1/100 inches (6)

  • StudsStudsStudsStuds

    Structural studsStructural studs NonNon--structural studsstructural studs Carry loadsCarry loads 11--5/8 flanges and 1/2 return 5/8 flanges and 1/2 return

    lipslips

    Not expected to carry axial loadsNot expected to carry axial loads 11--1/4 flanges and 1/4 return 1/4 flanges and 1/4 return

    lips, typicallips, typicallips.lips. Thickness from 33Thickness from 33--97 mil97 mil G60 galvanized coatingG60 galvanized coating

    p ypp yp Thickness often less than 33 milThickness often less than 33 mil G40 galvanized coatingG40 galvanized coating

  • TrackTrackTrackTrackWall stud must be seated in track with Wall stud must be seated in track with

    maximum gap of maximum gap of 1/81/8(General Provisions Standard)( )

    Stud

    T kTrack

  • Floor/Ceiling Joists and Roof RaftersFloor/Ceiling Joists and Roof Raftersgg Same crossSame cross--section elements as studssection elements as studs Webs typically 6 8 10 or 12Webs typically 6 8 10 or 12 Webs typically 6 , 8 , 10 , or 12Webs typically 6 , 8 , 10 , or 12

    flange

    liplipweb

  • CC--section floor systemsection floor system

    Typical Span Limits: 20 to 25 ft.

    Typical Depth Limit: 12 inches

  • ColdCold--Formed Steel TrussFormed Steel Truss

    Advantages: longer spans (over 60)Disadvantage: deeper members, bottom chord supported

  • ColdCold--Formed Steel TrussFormed Steel Truss

    Alternative: Top Chord Supported!

  • ColdCold--Rolled ChannelRolled ChannelColdCold Rolled ChannelRolled Channel

    used for wall bridgingand fits through web

    punch outs in studs and joists

  • Screw Attached

  • Weld attached.

  • Furring (Hat) ChannelFurring (Hat) Channel

    Similar to purlins in metal Similar to purlins in metalbuildings for sheathing attachment

  • Flat StrapsFlat StrapsFlat StrapsFlat Straps

    bridgingbridging lateral bracing

  • Specialty ConnectorsSpecialty Connectorsused in accordance with manufacturers specificationsused in accordance with manufacturers specifications

    Strap Tie strap Joist hanger Beam Holdownp p ghanger