1、Designation: C645 13C645 14Standard 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 U.S. Department of Defense.1. Scope*1.1 This specification covers nonstructural steel framing m
3、embers 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
4、pertains only to the test methods portion, Sections 99 and 10 and 10, of thisspecification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appropriate safety and health practices
5、 and determine the applicability ofregulatory limitations prior to 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, Metal
6、lic- and Nonmetallic-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
7、of Steel Framing Members to Receive Screw-Attached Gypsum Panel ProductsC1002 Specification for Steel Self-Piercing Tapping Screws for Application of Gypsum Panel Products or Metal Plaster Basesto Wood Studs or Steel StudsC1396/C1396M Specification for Gypsum Board2.2 AISI Standards:3S100 North Amer
8、ican Specification for the Design of Cold-Formed Steel Structural Members, 2007 editionS220 North American Standard for Cold-Formed Steel Framing Nonstructural FramingNonstructural Members, 2011Edition2.3 ICC-ES Document4ICC-ES-AC86 Acceptance Criteria for Steel Studs and Gypsum-Board Interior Nonlo
9、ad-Bearing WallsCompleteConstructionAC86Approved July 1995 (Editorially revised September 2005) (Formerly ICBO AC86 dated July1995)Cold-formed Steel Framing MembersInterior Nonload-bearing Wall AssembliesApproved May 20123. Terminology3.1 DefinitionsDefinitions shall be in accordance with Terminolog
10、y 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, and crossfurring members of grid suspension systems or other items manufactured in accordance with this specification.1 This specif
11、ication is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility ofSubcommittee C11.02 on Specifications and Test Methods for Accessories and Related Products.Current edition approved July 1, 2013Nov. 1, 2014. Published Jul
12、y 2013November 2014. Originally approved in 1970. Last previous edition approved in 20112013 asC645 11a.C645 13. DOI: 10.1520/C0645-13.10.1520/C0645-14.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Sta
13、ndardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from American Iron and Steel Institute (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
14、, 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 indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM re
15、commends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to 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
16、C700, West Conshohocken, PA 19428-2959. United States13.2.2 nonstructural wall stud, na member in a steel framed wall system which is limited 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
17、 (1460N/m), or a superimposed vertical load of not more than 200 lbs (890 N).4. Materials and Manufacture4.1 Members shall be manufactured from steel meeting the requirements of Specification A1003/A1003M.4.2 Members shall have a protective coating conforming to Specification A653/A653M G 40 G40 min
18、imum or shall have aprotective coating with an equivalent corrosion resistance.4.3 Members shall be manufactured from steel having a minimum thickness, individual measurement of 0.0179 in. (0.455mm)mm), before application of protective coating.5. Dimensions and Permissible Variations5.1 Studs and ri
19、gid furring channels shall have a configuration and steel thickness such that the system in which they are usedwill carry the design transverse loads without exceeding either the allowable stress of the steel or the allowable design deflection.Main beams and cross furring of grid suspension systems
20、shall be limited to a deflection of L/240. The manufacturer shall supplysufficient data for calculating design performance.NOTE 1Allowable deflection varies depending on the cladding used and architectural requirements. Detailed requirements shall be specified inapplication specifications.5.1.1 Memb
21、ers, 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 which 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(See Fig. 1. .)5.2 Memb
22、ers shall be manufactured within the limits as shown in Table 1 and Fig. 2.FIG. 1 Minimum Drywall Stud Cross SectionC645 1425.3 Rigid Furring ChannelsMinimum 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 i
23、nclude main beams and cross furring members which mechanically interlock to form a modularsupporting network. Length tolerance for grid suspension members 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
24、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 held 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 a
25、nd sharp edges.7. Cutouts7.1 Cutouts shall not reduce the performance of the members in the gypsum board construction assembly below the specifiedperformance requirements.8. Sectional Properties8.1 The sectional properties of members shall be computed in accordance with AISI S100 (See(see Tables 2 a
26、nd 3 and Figs.1 and 3).9. Performance Requirements9.1 PenetrationWhen tested in accordance with Section 1010, members shall be capable of pulling the head of the screwbelow the surface of the gypsum board in less than 2 s without spin out.9.2 Members that can show certified third party testing in ac
27、cordance with ICC-ES-AC86 (Approved July 1995EditoriallyRevised September 2005) May 2012), and conform to the limiting height tables in Specification C754, need not meet the minimumthickness limitation set forth in subsection 4.3 or the minimum section properties set forth in subsection 8.1.10. Pene
28、tration 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 service
29、performance has not been determined.10.2 Apparatus shall satisfyShall Satisfy the following: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,
30、 capable of being read to the nearest 0.1 s.0.1 s.10.3 Materials shall satisfyShall Satisfy the following:Following:10.3.1 Gypsum WallboardSpecification C1396/C1396M, Type X, 58 in. (16 mm) thick.TABLE 1 Manufacturing TolerancesDimensionA Item Checked Drywall Studs,in. (mm) Drywall Track,in. (mm)A l
31、ength + 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 (1.59) + 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
32、 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 max (12.7)I twist 132 per ft (0.79)12 max (12.7)132 per ft (0.79)12 max (12.7)A All measurements shall be taken not less than 1 ft (305 mm) from the end.B Outside dimension for stud;
33、inside for track.C645 14310.3.2 ScrewsSpecification C1002, Type S, minimum 1 in. (25.4 mm) 1 in. (25.4 mm) long.10.3.3 Paper Joint TapeSpecification C475/C475M.10.4 SamplingOne member shall be selected from each bundle or package, but not more than ten from any one shipment fortesting.10.5 Specimen
34、Preparation:10.5.1 Each member to be tested shall be cut into test specimens not less than 18 in. (460 mm) long.10.5.2 For each test, one piece of gypsum wallboard, 6 in. (150 mm) 6 in. (150 mm) square, shall be cut from not less than 12in. (300 mm) 12 in. (300 mm) from the edge or end of the gypsum
35、 wallboard.10.5.3 For each test, four pieces of paper joint tape, 2 in. (50 mm) 2 in. (50 mm) square shall be cut.10.6 ProcedureProcedure:10.6.1 Assemble the member, gypsum wallboard, and paper joint tape on a rigid, flat surface. (See Fig. 4 for studs, Fig. 5 forfurring channels.)10.6.2 Prior to pe
36、rforming the test, drive several screws without the paper joint tape to set the depth of the nose piece on thescrew gun, allowing the screws to be driven below the surface of the wallboard without breaking the gypsum wallboard face paper.10.6.3 Drive the screw through the paper joint tape, using the
37、 screw gun, while applying a force (dead weight and applied force)of 30 lbf (112.2 N). Drive the screw until the nosepiece of the screw gun has either stopped and seated the screw or the screw spinsout. Record if the screw has spun out and if it exceeds 2 s to seat the screw in the gypsum wallboard.
38、FIG. 2 Manufacturing TolerancesFIG. 3 Hat Furring Channel Cross SectionC645 14410.7 Number of Tests and Retests:10.7.1 A sample consisting of five specimens of members shall be tested.10.7.2 If not more than one of the test specimens fails to meet the requirements, the sample has met the requirement
39、s.10.7.3 If two of the five test specimens fail to meet the requirements, two additional test specimens shall be chosen for retesting.If either of the two additional test specimens fail, the sample has failed to meet the requirements of this test.10.8 ReportReport shall indicate the total number of
40、specimens tested and the number of specimens meeting the requirementsof this specification.10.9 Precision and BiasNo statement is made about either the precision or bias of this test method since the result merelystates whether or not there is conformance to the criteria for success specified in the
41、 procedure.11. Inspection11.1 Inspection of the members shall be agreed upon between the purchaser and the producer or supplier as part of the purchaseagreement.TABLE 2 Minimum Section Properties for Various StudsSectionDesignatorAStudDepthDesignThicknessMinimum Base SteelThicknessBGross AreaC Effec
42、tive 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 0.0312 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 1.3
43、7 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 0.0329 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 161350S1
44、25-30 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 0.454 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
45、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 0.206 133 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
46、.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 steel framing member dimensions.Example: 350S125-18350 designates the member web depth in 100ths of an inch, 350
47、= 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 -18 designates the minimum base metal thickness in mils, 18 = 0.0179 in. (0.454 mm)30 -30 designates the minimum base metal thickness in mils, 30 = 0.0
48、296 in. (0.752 mm)33 -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 centerline radius of 332 in. (2.38 mm), see Fig. 1.D Effective properties are calculated in accordance with A
49、ISI 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.TABLE 3 Hat Furring Channel Section PropertiesDesign Thickness Minimum BaseSteel ThicknessAGross AreaB Effective PropertiesB,C,DIxE Mn/Fin (mm) in (
