1、Designation: C955 15Standard Specification forLoad-Bearing (Transverse and Axial) Steel Studs, Runners(Tracks), and Bracing or Bridging for Screw Application ofGypsum Panel Products and Metal Plaster Bases1This standard is issued under the fixed designation C955; the number immediately following the
2、 designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification cover
3、s steel studs, runners (tracks),and bracing or bridging (with a base steel minimum thicknessof not less than 0.0329 in. (0.836 mm) for screw application ofgypsum panel products and metal plaster bases in load-bearing(transverse and axial) construction assemblies. Steel of lesserthickness shall be pe
4、rmitted in additional engineered products.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.2. Referenced Documents2.1 ASTM Standards:2
5、A653/A653M Specification for Steel Sheet, Zinc-Coated(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)by the Hot-Dip ProcessA792/A792M Specification for Steel Sheet, 55 %Aluminum-Zinc Alloy-Coated by the Hot-Dip ProcessA875/A875M Specification for Steel Sheet, Zinc-5 % Alu-minum Alloy-Coated by
6、the Hot-Dip ProcessA1003/A1003M Specification for Steel Sheet, Carbon,Metallic- and Nonmetallic-Coated for Cold-FormedFraming MembersC11 Terminology Relating to Gypsum and Related BuildingMaterials and SystemsC954 Specification for Steel Drill Screws for theApplicationof Gypsum Panel Products or Met
7、al Plaster Bases to SteelStuds from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) inThickness2.2 AISI Standard:3S100 North American Specification for the Design of Cold-Formed Steel Structural MembersS200 North American Standard for Cold-Formed SteelFramingGeneral Provisions2007 Edition3. Terminology3.
8、1 Definitions:3.1.1 Definitions shall be in accordance with TerminologyC11.3.2 Definitions of Terms Specific to This Standard:3.2.1 members, nstuds, runners, tracks, bracing, bridging,accessories, or other items manufactured in accordance withthis standard.3.2.2 structural member, na member in a ste
9、el framedsystem in which the loading exceeds any of the followingconditions: a transverse load of 20 lbf/ft (290 N/m) of memberlength, or an axial load, exclusive of sheathing, of 200 lbf(890 N) per member.4. Materials and Manufacture4.1 Members shall be manufactured from steel meeting therequiremen
10、ts of Specification A1003/A1003M.4.2 The minimum steel thickness (base steel) shall be notless than 0.0329 in. (0.84 mm).4.3 Individual measurements before the application of pro-tective coating shall be not less than 95 % of the specifieddesign thickness.4.4 Members shall have a protective coating
11、in accordancewith Table 1, CP 60 minimum.4.5 Edges of members shall be manufactured to minimizeburrs and sharp edges.4.6 Factory punch-outs, when provided, shall be locatedalong the centerline of the webs of members and shall havecenter-to-center spacing of not less than 24 in. (610 mm). Webpunch-ou
12、ts maximum width shall be the lesser of 0.5 times the1This specification is under the jurisdiction of 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.C
13、urrent edition approved March 15, 2015. Published April 2015. Originallyapproved in 1981. Last previous edition approved in 2011 as C955 11c. DOI:10.1520/C0955-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book
14、 of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Iron and Steel Institute (AISI), 1140 ConnecticutAve., NW, Suite 705, Washington, DC 20036, http:/www.steel.org.*A Summary of Changes section appears at the end of this stan
15、dardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1member depth, d, or 212 in. (64 mm). Web punch-out lengthshall not exceed 412 in. (114 mm). Minimum distance betweenthe end of the member and the near edge of the web punch-outshall
16、be 10 in. (254 mm). The size of the factory punch-outsshall not exceed the size used in design and the center-to-centerspacing shall not be less than that used in design.4.7 The properties and strength of members shall be com-puted in accordance with the AISI S100.5. Dimensions and Permissible Varia
17、tions5.1 Data for calculating design performance shall be sup-plied by the manufacturer.5.2 The width of the surface to which the sheathing board isattached shall be not less than 114 in. (32 mm).5.3 Runners (track) shall be formed in a U-shapedconfiguration, having a depth compatible with that of t
18、he studsof the same nominal size.5.4 Minimum height of runner (track) flanges shall be114 in. (32 mm).5.5 Members shall be manufactured within the limits asshown in Table 2 and Fig. 1.5.6 Bracing and bridging shall have configuration and steelthickness to provide secondary support for the studs in a
19、ccor-dance with the AISI S100.6. Workmanship, Finish, and Appearance6.1 The steel members shall be free of defects that interferewith the purpose for which they are intended.7. Inspection7.1 Inspection of the members shall be agreed upon betweenthe purchaser and the producer or supplier as part of t
20、hepurchase agreement.8. Rejection8.1 When specified in the purchase agreement, membersthat fail to conform to the requirements of this specificationshall be rejected. Rejection shall be reported to the producer orsupplier promptly and in writing. The notice of rejection shallTABLE 1 Coating Designat
21、ionsCoatingClassificationCoatingDesignatorMinimum Coating RequirementsZinc-CoatedAZinc IronB55 % Al-ZincCZinc-5 %Doz/ft2(g m2) oz/ft2(g m2) oz/ft2(g m2) oz/ft2(g m2)Metallic Coated CP 60 G60 (Z 180) A60 (ZF 180) AZ 50 (AZM 150) GF 30 (ZGF 90)CP 90 G90 (Z 275) Not Applicable AZ 50 (AZM 150) GF 45 (ZG
22、F 135)Painted Metallic PM The metallic coated substrate shall meet the requirements of metallic coated. In addition, the paint film shallhave a minimum thickness of 0.5 mil (0.013 mm) per side (primer plus topcoat) with a minimum primer thick-ness of 0.1 mil (0.0002 mm) per side.EAZinc-coated steel
23、sheet as described in Specification A653/A653M.BZinc-iron alloy-coated steel sheet as described in Specification A653/A653M.C55 % Aluminum-zinc alloy-coated steel sheet as described in Specification A792/A792M.DZinc-5 % aluminum alloy-coated steel sheet as described in Specification A875/A875M.EIn a
24、ccordance with the requirements of Specification A1003/A1003M.TABLE 2 Manufacturing TolerancesDimensionAItem Checked Structural Studs, in. (mm) Structural Track, in. (mm)A length+18 (3.18)332 (2.38)+12 (12.7)14 (6.35)BBweb width+132 (0.79)132 (0.79)+132 (0.79)+18 (3.18)Cflare +116 (1.59) + 0 (0)over
25、bend 116 (1.59) 332 (2.38)Dhole center +116 (1.59)n/awidth 116 (1.59)Ehole center +12 (12.7)n/aalong length 12 (12.7)F crown+116 (1.59)116 (1.59)+116 (1.59)116 (1.59)GCcamber18 (3.2) max per 10 ft132 per ft (0.79)12 max (12.7)HCbow18 (3.2) max per 10 ft132 per ft (0.79)12 max (12.7)I twist132 per ft
26、 (0.79)132 per ft (0.79)12 max (12.7)12 max (12.7)J flange width+18 (3.18)116 (1.59)+14 (6.35)116 (1.59)K stiffening lip length+18 (3.18)132 (0.79)n/aAAll measurements shall be taken not less than 1 ft (305 mm) from the end.BOutside dimension for stud; inside for track.C 18 in. (3 mm) max per 10 ft
27、(3000 mm) represents L/960 maximum for overall camber and bow. Thus a 20-ft (6000-mm) long member would have14 in.(6mm)permissible maximum; a 5-ft (1500-mm) long member would have116 in. (1.5 mm) permissible maximum.C955 152contain a statement documenting how the member has failed toconform to the r
28、equirements of this specification and thepurchase agreement.9. Certification9.1 When specified in the purchase agreement, a producersor suppliers report shall be furnished at the time of shipmentcertifying that the product is in compliance with this specifi-cation.10. Marking and Identification10.1
29、See AISI S200, Section A5Product Identification.11. Protection11.1 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.11.2 When materials are stored outside, they shall bestacked
30、 off the ground and be properly supported on a levelsurface.12. Keywords12.1 runners; screws; section properties; studs; thicknessSUMMARY OF CHANGESCommittee C11 has identified the location of selected changes to this standard since the last issue (insertdesignation and year date) that may impact th
31、e use of this standard. (Approved March 15, 2015.)(1) Previous subsection 1.3, Sections 5 and 8, and Fig. 1, allregarding the penetration test, were removed.FIG. 1 Manufacturing TolerancesC955 153ASTM International takes no position respecting the validity of any patent rights asserted in connection
32、 with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible t
33、echnical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful conside
34、ration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr
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