1、Designation: C645 11aC645 13Standard Specification forNonstructural Steel Framing Members1This standard is issued under the fixed designation C645; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、 in parentheses 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 framing membe
3、rs in interior construction assemblies.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.3 The following safety hazards caveat pert
4、ains only to the test methods portion, Sections 9 and 10, of this specification:Thisstandard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and health practices and determin
5、e the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:2A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by theHot-Dip ProcessA1003/A1003M Specification for Steel Sheet, Carbon, Metallic- and Nonm
6、etallic-Coated for Cold-Formed Framing MembersC11 Terminology Relating to Gypsum and Related Building Materials and SystemsC475/C475M Specification for Joint Compound and Joint Tape for Finishing Gypsum BoardC1396/C1396M Specification for Gypsum BoardC754 Specification for Installation of Steel Fram
7、ing Members to Receive Screw-Attached Gypsum Panel ProductsC1002 Specification for Steel Self-Piercing Tapping Screws for the Application of Gypsum Panel Products or Metal PlasterBases to Wood Studs or Steel Studs2.2 AISI Standards:3S100 North American Specification for the Design of Cold-Formed Ste
8、el Structural Members, 2007 editionS200S220 North American Standard for Cold-Formed Steel Framing General Provisions, 2007Nonstructural Members, 2011Edition2.3 ICC-ES Document4ICC-ES-AC86 Acceptance Criteria for Steel Studs and Gypsum-Board Interior Nonload-Bearing WallsCompleteConstructionAC86Appro
9、ved July 1995 (Editorially revised September 2005) (Formerly ICBO AC86 dated July 1995)3. Terminology3.1 DefinitionsDefinitions shall be in accordance with Terminology C11.3.2 Definitions of Terms Specific to This Standard:3.2.1 members, nin screw application of gypsum board, studs, runners (track),
10、 hat furring channels, main beams and crossfurring members of grid suspension systems or other items manufactured in accordance with this specification.1 This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsi
11、bility ofSubcommittee C11.02 on Specifications and Test Methods for Accessories and Related Products.Current edition approved Oct. 1, 2011July 1, 2013. Published October 2011July 2013. Originally approved in 1970. Last previous edition approved in 2011 asC645 11.C645 11a. DOI: 10.1520/C0645-11A.10.1
12、520/C0645-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from American Iron and Steel Institu
13、te (AISI), 1140 Connecticut Ave., NW, Suite 705, Washington, DC 20036, http:/www.steel.org.4 Available from ICC Evaluation Services, Inc., 5360 Workman Mill Road, Whittier, CA 90601, www.icc-es.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an
14、indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to
15、be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.2 nonstructural wall stud, na member in a steel framed wall system which is limit
16、ed to a lateral (transverse) load of notmore than 10 lb/ft2 (480 Pa), a superimposed vertical load, exclusive of sheathing materials, of not more than 100 lbf/ft (1460N/m), or a superimposed vertical load of not more than 200 lbs (890 N).4. Materials and Manufacture4.1 Members shall be manufactured
17、from steel meeting the requirements of Specification A1003/A1003M.4.2 Members shall have a protective coating conforming to Specification A653/A653M G 40 minimum or shall have aprotective coating with an equivalent corrosion resistance.4.3 Members shall be manufactured from steel having a minimum th
18、ickness, 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 configuration and steel thickness such that the system in which they are usedwill carry the design transverse loa
19、ds without exceeding either the allowable stress of the steel or the allowable design deflection.Main beams and cross furring of grid suspension systems shall be limited to a deflection of L/240. The manufacturer shall supplysufficient data for calculating design performance.NOTE 1Allowable deflecti
20、on varies depending on the cladding used and architectural requirements. Detailed requirements shall be specified inapplication specifications.5.1.1 Members, except main beams of grid suspension systems, shall be sufficiently rigid to permit penetration of the screw.5.1.2 Minimum width of face to wh
21、ich gypsum board is screw-attached shall be not less than 114 in. (32 mm).5.1.3 Minimum lip dimension shall be 316 in. (5 mm). See Fig. 1.5.2 Members shall be manufactured within the limits as shown in Table 1 and Fig. 2.FIG. 1 Minimum Drywall Stud Cross SectionC645 1325.3 Rigid Furring ChannelsMini
22、mum depth shall be 78 in. (22 mm). Minimum width of furring attachment flanges (see Fig.3) shall be 12 in. (12.7 mm).5.4 Grid suspension systems include main beams and cross furring members which mechanically interlock to form a modularsupporting network. Length tolerance for grid suspension members
23、 shall be 6116 in. (1.59 mm).5.5 Runners (track) shall be formed in a U-shaped configuration, having web depth compatible with those of the studs of thesame nominal size. The runners (track) shall be designed such that when the studs are placed in both the top and bottom runners(track), they are hel
24、d by friction. Minimum height of flanges shall be 1 in. (25 mm).6. Edges6.1 Members shall be manufactured in such a fashion as to minimize burrs and sharp edges.7. Cutouts7.1 Cutouts shall not reduce the performance of the members in the gypsum board construction assembly below the specifiedperforma
25、nce requirements.8. Sectional Properties8.1 The sectional properties of members shall be computed in accordance with AISI S100 (See Tables 2 and 3 and Figs. 1 and3).9. Performance Requirements9.1 PenetrationWhen tested in accordance with Section 10, members shall be capable of pulling the head of th
26、e screw belowthe surface of the gypsum board in less than 2 s without spin out.TABLE 1 Manufacturing TolerancesDimensionA Item Checked Drywall Studs,in. (mm) Drywall Track,in. (mm)A length + 18 (3.18) 14 (6.35)+ 1 (25.40) 14 (6.35)BB web width + 132 (0.79) 132 (0.79)+ 18 (3.18) 0 (0)C flare + 116 (1
27、.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 camber 132 per ft (0.79)12 max (12.7)132 per ft (0.79)12 max (12.7)H bow 132 per ft (0.79)12 max (12.7)132 per ft (0.79)12
28、max (12.7)I twist 132 per ft (0.79)12 max (12.7)132 per ft (0.79)12 max (12.7)A The section designator defines the cold-formed steel framing member dimen-sions.Example: 350S125-18350 designates the member web depth in 100ths of an inch, 350 = 3.50in. (88.9 mm)S designates the type of member, S = Stu
29、d125 designates the member flange width in 100ths of an inch, 125 = 1.25in. (31.8 mm)18 designates the minimum base metal thickness in mils, 18 = 0.0179 in.(0.454 mm)30 designates the minimum base metal thickness in mils, 30 = 0.0296 in.(0.752 mm)33 designates the minimum base metal thickness in mil
30、s, 33 = 0.0329 in.(0.836 mm)B Minimum base steel thickness is 95 % of Design Thickness.C Properties are based on a centerline radius of 332 in. (2.38 mm), see Fig. 1.D Effective properties are calculated in accordance with AISI S100 and are basedon a yield strength, Fy = 33 ksi.E Moment of inertia,
31、Ix, given is for deflection calculations.F Allowable moment is taken as the lowest value based on local or distortionalbuckling. For distortional buckling, K = 0 and = 1.G Where noted, member web height-to-thickness ratio exceeds 200, web stiffenersrequired at supports.C645 1339.2 Members that can s
32、how certified third party testing in accordance with ICC-ES-AC86 (Approved July 1995EditoriallyRevised September 2005) and conform to the limiting height tables in Specification C754 need not meet the minimum thicknesslimitation set forth in 4.3 or the minimum section properties set forth in 8.1.10.
33、 Penetration Test10.1 Significance and UseThis test method provides a procedure for evaluating the members ability to pull the head of ascrew below the surface of gypsum wallboard. It shall be used to determine compliance with this specification. The degree ofperformance of this test method with ser
34、vice performance has not been determined.10.2 Apparatus shall satisfy the following:10.2.1 Power-Driven Drill Screw 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
35、read to the nearest 0.1 s.10.3 Materials shall satisfy the following:10.3.1 Gypsum WallboardSpecification C1396/C1396M, Type X, 58 in. (16 mm) thick.10.3.2 ScrewsSpecification C1002, Type S, minimum 1 in. (25.4 mm) long.10.3.3 Paper Joint TapeSpecification C475/C475M.FIG. 2 Manufacturing TolerancesF
36、IG. 3 Hat Furring Channel Cross SectionC645 13410.4 SamplingOne member shall be selected from each bundle or package but not more than ten from any one shipment fortesting.10.5 Specimen Preparation:10.5.1 Each member to be tested shall be cut into test specimens not less than 18 in. (460 mm) long.TA
37、BLE 2 Minimum Section Properties for Various StudsSectionDesignatorAStudDepthDesignThicknessMinimum Base SteelThicknessBGross AreaC Effective PropertiesC,DIxE Mn/Fin. (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 0.61 6916
38、2S125-30 1.625 41 0.0312 0.792 0.0296 0.752 0.132 85 0.060 25 1.19 134162S125-33 1.625 41 0.0346 0.879 0.0329 0.835 0.145 94 0.066 27 1.37 155250S125-18 2.500 64 0.0188 0.478 0.0179 0.454 0.097 63 0.910 38 1.03 116250S125-30 2.500 64 0.0312 0.792 0.0296 0.752 0.159 102 0.159 66 2.09 236250S125-33 2.
39、500 64 0.0346 0.879 0.0329 0.835 0.176 114 0.175 73 2.40 272350S125-18 3.500 89 0.0188 0.478 0.0179 0.454 0.115 74 0.203 84 1.42 161350S125-30 3.500 89 0.0312 0.792 0.0296 0.752 0.190 123 0.346 144 2.96 335350S125-33 3.500 89 0.0346 0.879 0.0329 0.835 0.210 135 0.382 159 3.45 390362S125-18 3.625 92
40、0.0188 0.478 0.0179 0.454 0.118 76 0.221 92 1.48 167362S125-30 3.625 92 0.0312 0.792 0.0296 0.752 0.194 125 0.376 157 3.08 348362S125-33 3.625 92 0.0346 0.879 0.0329 0.835 0.215 138 0.415 173 3.59 406400S125-18G 4.000 102 0.0188 0.478 0.0179 0.454 0.125 81 0.281 117 1.64 185400S125-30 4.000 102 0.03
41、12 0.792 0.0296 0.752 0.206 133 0.474 197 3.44 388400S125-33 4.000 102 0.0346 0.879 0.0329 0.835 0.228 147 0.524 218 4.01 453600S125-30 6.000 152 0.0312 0.792 0.0296 0.752 0.268 173 1.223 513 5.39 609600S125-33 6.000 152 0.0346 0.879 0.0329 0.835 0.297 192 1.378 574 6.32 714TABLE 2 Minimum Section P
42、roperties for Various StudsSectionDesignatorAStudDepthDesignThicknessMinimum Base SteelThicknessBGross AreaC Effective PropertiesC,DIxE Mn/Fin. (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 0.61 69162S125-30 1.625 41 0.031
43、2 0.792 0.0296 0.752 0.132 85 0.060 25 1.19 134162S125-33 1.625 41 0.0346 0.879 0.0329 0.835 0.145 94 0.066 27 1.37 155250S125-18 2.500 64 0.0188 0.478 0.0179 0.454 0.097 63 0.910 38 1.03 116250S125-30 2.500 64 0.0312 0.792 0.0296 0.752 0.159 102 0.159 66 2.09 236250S125-33 2.500 64 0.0346 0.879 0.0
44、329 0.835 0.176 114 0.175 73 2.40 272350S125-18 3.500 89 0.0188 0.478 0.0179 0.454 0.115 74 0.203 84 1.42 161350S125-30 3.500 89 0.0312 0.792 0.0296 0.752 0.190 123 0.346 144 2.96 335350S125-33 3.500 89 0.0346 0.879 0.0329 0.835 0.210 135 0.382 159 3.45 390362S125-18 3.625 92 0.0188 0.478 0.0179 0.4
45、54 0.118 76 0.221 92 1.48 167362S125-30 3.625 92 0.0312 0.792 0.0296 0.752 0.194 125 0.376 157 3.08 348362S125-33 3.625 92 0.0346 0.879 0.0329 0.835 0.215 138 0.415 173 3.59 406400S125-18G 4.000 102 0.0188 0.478 0.0179 0.454 0.125 81 0.281 117 1.64 185400S125-30 4.000 102 0.0312 0.792 0.0296 0.752 0
46、.206 133 0.474 197 3.44 388400S125-33 4.000 102 0.0346 0.879 0.0329 0.835 0.228 147 0.524 218 4.01 453600S125-30 6.000 152 0.0312 0.792 0.0296 0.752 0.268 173 1.223 513 5.39 609600S125-33 6.000 152 0.0346 0.879 0.0329 0.835 0.297 192 1.378 574 6.32 714A The section designator defines the cold-formed
47、 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 thi
48、ckness in mils, 18 = 0.0179 in. (0.454 mm)30 designates the minimum base metal thickness in mils, 30 = 0.0296 in. (0.752 mm)33 designates the minimum base metal thickness in mils, 33 = 0.0329 in. (0.836 mm)B Minimum base steel thickness is 95 % of Design Thickness.C Properties are based on a centerl
49、ine radius of 332 in. (2.38 mm), see Fig. 1.D Effective properties are calculated in accordance with AISI S100 and are based on a yield strength, Fy = 33 ksi.E Moment of inertia, Ix, given is for deflection calculations.F Allowable moment is taken as the lowest value based on local or distortional buckling. For distortional buckling, K = 0 and = 1.G Where noted, member web height-to-thickness ratio exceeds 200, web stiffeners required at supports.C645 13510.5.2 For each test, one piece of gy
