Download - Cold-Formed Steel Framing Members
COLDCOLD--FORMED STEEL FORMED STEEL FRAMING MEMBERS FRAMING MEMBERS
Dr. Roger LaBoubeCurator’s 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 1/8”1/8”(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 12”Webs 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 manufacturer’s specificationsused in accordance with manufacturer’s specifications
Strap Tie strap Joist hanger Beam Holdownp p ghanger