1、Designation: C 645 09Standard Specification forNonstructural Steel Framing Members1This standard is issued under the fixed designation C 645; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in pa
2、rentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers nonstructural steel framingmembers in i
3、nterior construction assemblies.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 The following safety hazards caveat pertains only
4、 to thetest methods portion, Sections 9 and 10, of this specification:This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the appli
5、cability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A 653/A 653M Specification for Steel Sheet, Zinc-Coated(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)by the Hot-Dip ProcessA 1003/A 1003M Specification for Steel Sheet, Carbon,Metallic- and Nonmetallic-C
6、oated for Cold-Formed Fram-ing MembersC11 Terminology Relating to Gypsum and Related Build-ing Materials and SystemsC 475/C 475M Specification for Joint Compound and JointTape for Finishing Gypsum BoardC 1396/C 1396M Specification for Gypsum BoardC 754 Specification for Installation of Steel Framing
7、 Mem-bers to Receive Screw-Attached Gypsum Panel ProductsC 1002 Specification for Steel Self-Piercing TappingScrews for the Application of Gypsum Panel Products orMetal Plaster Bases to Wood Studs or Steel Studs2.2 AISI Standard:Specification for the Design of Cold-Formed Steel StructuralMembers3AIS
8、I Code of Standard Practice for Cold-Formed SteelStructural Framing Committee on Framing Standards 2005 Edition32.3 ICC-ES Document4ICC-ES-AC86 Acceptance Criteria for Steel Studs andGypsum-Board Interior Nonload-Bearing WallsComplete ConstructionAC86Approved July 1995(Editorially revised September
9、2005) (Formerly ICBOAC86 dated July 1995)3. Terminology3.1 DefinitionsDefinitions shall be in accordance withTerminology C11.3.2 Definitions of Terms Specific to This Standard:3.2.1 members, nin screw application of gypsum board,studs, runners (track), hat furring channels, main beams andcross furri
10、ng members of grid suspension systems or otheritems manufactured in accordance with this specification.3.2.2 nonstructural wall stud, na member in a steelframed wall system which is limited to a lateral (transverse)load of not more than 10 lb/ft2(480 Pa), a superimposedvertical load, exclusive of sh
11、eathing materials, of not more than100 lbf/ft (1460 N/m), or a superimposed vertical load of notmore than 200 lbs (890 N).4. Materials and Manufacture4.1 Members shall be manufactured from steel meeting therequirements of Specification A 1003/A 1003M.1This specification is under the jurisdiction of
12、ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accessories andRelated Products.Current edition approved July 15, 2009. Published September 2009. Originallyapproved in 1970. Last prev
13、ious edition approved in 2008 as C 645 08a.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Am
14、erican Iron and Steel Institute (AISI), 1140 ConnecticutAve., NW, Suite 705, Washington, DC 20036, http:/www.steel.org.4Available from ICC Evaluation Services, Inc., 5360 Workman Mill Road,Whittier, CA 90601, www.icc-es.org.1*A Summary of Changes section appears at the end of this standard.Copyright
15、 ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.2 Members shall have a protective coating conforming toSpecification A 653/A 653M G 40 minimum or shall have aprotective coating with an equivalent corrosion resistance.4.3 Members shall be man
16、ufactured from steel having aminimum thickness, individual measurement of 0.0179 in.(0.455 mm) before application of protective coating.5. Dimensions and Permissible Variations5.1 Studs and rigid furring channels shall have a configu-ration and steel thickness such that the system in which theyare u
17、sed will carry the design transverse loads without exceed-ing either the allowable stress of the steel or the allowabledesign deflection. Main beams and cross furring of gridsuspension systems shall be limited to a deflection of L/240.The manufacturer shall supply sufficient data for calculatingdesi
18、gn performance.NOTE 1Allowable deflection varies depending on the cladding usedand architectural requirements. Detailed requirements shall be specified inapplication specifications.5.1.1 Members, except main beams of grid suspensionsystems, shall be sufficiently rigid to permit penetration of thescr
19、ew.5.1.2 Minimum width of face to which gypsum board isscrew-attached shall be not less than 114 in. (32 mm).5.1.3 Minimum lip dimension shall be316 in. (5 mm). SeeFig. 1.5.2 Members shall be manufactured within the limits asshown in Table 1 and Fig. 2.5.3 Rigid Furring ChannelsMinimum depth shall b
20、e78in. (22 mm). Minimum width of furring attachment flanges (seeFig. 3) shall be12 in. (12.7 mm).5.4 Grid suspension systems include main beams and crossfurring members which mechanically interlock to form amodular supporting network. Length tolerance for grid suspen-sion members shall be 6116 in. (
21、1.59 mm).5.5 Runners (track) shall be formed in a U-shaped configu-ration, having web depth compatible with those of the studs ofthe same nominal size. The runners (track) shall be designedsuch that when the studs are placed in both the top and bottomFIG. 1 Minimum Drywall Stud Cross SectionC645092r
22、unners (track), they are held by friction. Minimum height offlanges shall be 1 in. (25 mm).6. Edges6.1 Members shall be manufactured in such a fashion as tominimize burrs and sharp edges.7. Cutouts7.1 Cutouts shall not reduce the performance of the mem-bers in the gypsum board construction assembly
23、below thespecified performance requirements.8. Sectional Properties8.1 The sectional properties of members shall be computedin accordance with AISI Specifications for the Design ofCold-Formed Steel Structural Members (See Tables 2 and 3and Figs. 1 and 3).9. Performance Requirements9.1 PenetrationWhe
24、n tested in accordance with Section10, members shall be capable of pulling the head of the screwbelow the surface of the gypsum board in less than 2 s withoutspin out.9.2 Members that can show certified third party testing inaccordance with ICC-ES-AC86 (Approved July 1995Editorially Revised Septembe
25、r 2005) and conform to thelimiting height tables in Specification C 754 need not meet theminimum thickness limitation set forth in 4.3 or the minimumsection properties set forth in 8.1.10. Penetration Test10.1 Significance and UseThis test method provides aprocedure for evaluating the members abilit
26、y to pull the headof a screw below the surface of gypsum wallboard. It shall beused to determine compliance with this specification. Thedegree of performance of this test method with service perfor-mance has not been determined.10.2 Apparatus shall satisfy the following:10.2.1 Power-Driven Drill Scr
27、ew Gun, capable of 4000 rpm(free spindle speed) with a depth-sensitive nose piece, suppliedwith a screw driving bit to fit the screw used in the test.10.2.2 Stop Watch, capable of being read to the nearest 0.1s.10.3 Materials shall satisfy the following:10.3.1 Gypsum WallboardSpecification C 1396/C
28、1396M, Type X,58 in. (15.9 mm) thick.10.3.2 ScrewsSpecification C 1002, Type S, minimum 1in. (25.4 mm) long.10.3.3 Paper Joint TapeSpecification C 475/C 475M.10.4 SamplingOne member shall be selected from eachbundle or package but not more than ten from any oneshipment for testing.10.5 Specimen Prep
29、aration:10.5.1 Each member to be tested shall be cut into testspecimens not less than 18 in. (460 mm) long.10.5.2 For each test, one piece of gypsum wallboard, 6 in.(150 mm) square, shall be cut from not less than 12 in. (300mm) from the edge or end of the gypsum wallboard.10.5.3 For each test, four
30、 pieces of paper joint tape, 2 in. (50mm) square shall be cut.10.6 Procedure10.6.1 Assemble the member, gypsum wallboard and paperjoint tape on a rigid, flat surface. (See Fig. 4 for studs, Fig. 5for furring channels.)10.6.2 Prior to performing the test, drive several screwswithout the paper joint t
31、ape to set the depth of the nose pieceon the screw gun, allowing the screws to be driven below thesurface of the wallboard without breaking the gypsum wall-board face paper.10.6.3 Drive the screw through the paper joint tape, usingthe screw gun, while applying a force (dead weight and appliedforce)
32、of 30 lbf (112.2 N). Drive the screw to below the surfaceof the gypsum wallboard. Record if the screw has spun out andif it exceeds2stopull the head of the screw below the surfaceof the gypsum wallboard.10.7 Number of Tests and Retests:10.7.1 Five specimens of members shall be tested.10.7.2 If more
33、than one test specimen fails to meet therequirements, two more test specimens shall be chosen forretesting.10.8 ReportReport shall indicate all specimens meetingthe requirements of this specification if the time read from thestop watch is less than 2 s, and the screw did not spin out; orshall indica
34、te all failing if the time read is equal to or longerthan 2 s, or the screw spun out.10.9 Precision and BiasNo statement is made about eitherthe precision or bias of this test method since the result merelystates whether or not there is conformance to the criteria forsuccess specified in the procedu
35、re.11. Inspection11.1 Inspection of the members shall be agreed uponbetween the purchaser and the producer or supplier as part ofthe purchase agreement.TABLE 1 Manufacturing TolerancesDimensionAItem CheckedDrywall Studs,in. (mm)Drywall Track,in. (mm)A length +18 (3.18)14 (6.35)+ 1 (25.40)14 (6.35)BB
36、web width +132 (0.79)132 (0.79)+18 (3.18)0(0)C flare +116 (1.59) + 0 (0)overbend 116 (1.59) 316 (4.76)D hole centerwidth+18 (3.18)18 (3.18)NAE hole centerlength+14 (6.35)14 (6.35)NAF crown +18 (3.18)18 (3.18)+18 (3.18)18 (3.18)G camber132 per ft (0.79)12 max (12.7)132 per ft (0.79)12 max (12.7)H bow
37、132 per ft (0.79)12 max (12.7)132 per ft (0.79)12 max (12.7)I twist132 per ft (0.79)12 max (12.7)132 per ft (0.79)12 max (12.7)AAll measurements shall be taken not less than 1 ft (305 mm) from the end.BOutside dimension for stud; inside for track.C64509312. Rejection12.1 When specified in the purcha
38、se agreement, membersthat fail to conform to the requirements of the specificationshall be rejected. Rejection shall be reported to the producer orsupplier promptly and in writing. The notice of rejection shallcontain a statement documenting how the member has failed toconform to the requirements of
39、 this specification and thepurchase agreement.13. Certification13.1 When specified in the purchase agreement, a produc-ers or suppliers report shall be furnished at the time ofshipment certifying that the product is in compliance with thisspecification.14. Marking and Identification14.1 Groups of li
40、ke members shall be marked with a label,or a tag attached thereto. Marking shall include the rollformersidentification (name, logo, or initials), length, quantity androllformers member designator including member depth,flange size, and minimum steel thickness in mils or inches,exclusive of protectiv
41、e coating.14.2 In addition to the marking referenced in 14.1, indi-vidual members shall have a legible label, stencil, or emboss-ment, at a maximum distance of 96 in. (2440 mm) on center, onthe member, with the following minimum information:14.2.1 The rollformers identification (that is, name, logo
42、orinitials).14.2.2 The minimum steel thickness, in mils or inches,exclusive of protective coating.FIG. 2 Manufacturing TolerancesFIG. 3 Hat Furring Channel Cross SectionC64509414.2.3 The minimum yield strength in ksi (MPa) if otherthan 33 ksi (230 MPa).14.2.4 The minimum protective coating weight, G
43、-XX, ifother than as specified in Section 4.15. Protection15.1 Material shall be protected during shipment as re-quired. When specified in the purchase order, the membersshall be packaged in accordance with the purchasers instruc-tions.15.2 Material shall be received and stored in accordancewith AIS
44、I COSP, paragraph F3.16. Keywords16.1 furring channels; grid suspension systems; gypsumboard; runners; screws; section properties; spinout; studsTABLE 2 Minimum Section Properties for Various StudsSectionDesignatorAStudDepthDesignThicknessMinimum Base MetalThicknessBArea Effective PropertiesCIxDMain
45、. (mm) in. (mm) in. (mm) in2(mm2)in4(1000 mm4) (in-k) (N-m)162S125-18 1.625 41 0.0188 0.478 0.0179 0.454 0.080 52 0.034 14 0.66 75162S125-30 1.625 41 0.0312 0.792 0.0296 0.752 0.132 85 0.060 25 1.16 131162S125-33 1.625 41 0.0346 0.879 0.0329 0.835 0.145 94 0.066 27 1.35 153250S125-18 2.500 64 0.0188
46、 0.478 0.0179 0.454 0.097 63 0.089 37 1.17 132250S125-30 2.500 64 0.0312 0.792 0.0296 0.752 0.159 102 0.159 66 2.06 2.33250S125-33 2.500 64 0.0346 0.879 0.0329 0.835 0.176 114 0.175 73 2.38 269350S125-18 3.500 89 0.0188 0.478 0.0179 0.454 0.115 74 0.197 82 1.72 194350S125-30 3.500 89 0.0312 0.792 0.
47、0296 0.752 0.190 123 0.346 144 3.29 372350S125-33 3.500 89 0.0346 0.879 0.0329 0.835 0.210 135 0.382 159 3.77 426362S125-18 3.625 92 0.0188 0.478 0.0179 0.454 0.118 76 0.215 89 1.78 201362S125-30 3.625 92 0.0312 0.792 0.0296 0.752 0.194 125 0.375 156 3.46 391362S125-33 3.625 92 0.0346 0.879 0.0329 0
48、.835 0.215 138 0.415 173 3.96 448400S125-18E4.000 102 0.0188 0.478 0.0179 0.454 0.125 81 0.265 110 1.96 221400S125-30 4.000 102 0.0312 0.792 0.0296 0.752 0.206 133 0.473 197 3.99 450400S125-33 4.000 102 0.0346 0.879 0.0329 0.835 0.228 147 0.523 218 4.56 515600S125-30 6.000 152 0.0312 0.792 0.0296 0.
49、752 0.268 173 1.259 524 6.54 739600S125-33 6.000 152 0.0346 0.879 0.0329 0.835 0.297 192 1.391 579 8.06 911AThe section designator defines the cold-formed steel framing member dimensions.Example: 350S125-18350 designates the member web depth in 100ths of an inch, 350 = 3.50 in. (88.9 mm)S designates the type of member, S = Stud125 designates the member flange width in 100ths of an inch, 125 = 1.25 in. (31.8 mm)18 designates the minimum base metal thickness in mils, 18 = 0.0179 in. (0.454 mm)30 designates th
