ASTM C645-2009 Standard Specification for Nonstructural Steel Framing Members.pdf
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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
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