1、Designation: C955 151C955 17Standard Specification forLoad-Bearing (Transverse and Axial) Steel Studs, Runners(Tracks), and Bracing or Bridging for Screw Application ofGypsum Panel Products and Metal Plaster BasesCold-Formed Steel Structural Framing Members1This standard is issued under the fixed de
2、signation C955; 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 parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision
3、 or reapproval.1 NOTEFig. 1 was revised editorially to remove an unnecessary asterisk in Dec. 2015.1. Scope*1.1 This specification covers steel studs, runners (tracks), and bracing or bridging cold-formed steel structural framing members(with a base steel minimum thickness of not less than 0.0329 in
4、. (0.836 mm) for screw application of gypsum panel products andmetal plaster bases in load-bearing (transverse and axial) construction assemblies. Steel of lesser thickness shall be permitted inadditional engineered products.1.2 The values stated in inch-pound units are to be regarded as standard. T
5、he values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.3 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Princi
6、ples for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (G
7、alvannealed) by theHot-Dip ProcessA792/A792M Specification for Steel Sheet, 55 % Aluminum-Zinc Alloy-Coated by the Hot-Dip ProcessA875/A875M Specification for Steel Sheet, Zinc-5 % Aluminum Alloy-Coated by the Hot-Dip ProcessA1003/A1003M Specification for Steel Sheet, Carbon, Metallic- and Nonmetall
8、ic-Coated for Cold-Formed Framing MembersC11 Terminology Relating to Gypsum and Related Building Materials and SystemsC954 Specification for Steel Drill Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Steel Studsfrom 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in Thickne
9、ss2.2 AISI Standard:3S100 North American Specification for the Design of Cold-Formed Steel Structural MembersS200S240 North American Standard for Cold-Formed Steel FramingGeneral Provisions2007Structural Framing2015Edition3. Terminology3.1 Definitions:3.1.1 Definitions shall be in accordance with Te
10、rminology C11.3.2 Definitions of Terms Specific to This Standard:1 This specification 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 Rel
11、ated Products.Current edition approved March 15, 2015June 1, 2017. Published April 2015June 2017. Originally approved in 1981. Last previous edition approved in 20112015 asC955 11c.C955 151. DOI: 10.1520/C0955-15E01.10.1520/C0955-17.2 For referencedASTM standards, visit theASTM website, www.astm.org
12、, 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 Institute (AISI), 1140 Connecticut Ave., NW, Suite 705, Washington, DC 20036, http:/www
13、.steel.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 recommends that users consul
14、t 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 C700, West Conshohocken, P
15、A 19428-2959. United States13.2.1 members, nstuds, runners, tracks, bracing, bridging, accessories, or other items manufactured in accordance with thisstandard.specification.3.2.2 structural member, na member in a steel framed system in which the loading exceeds any of the following conditions:a tra
16、nsverse load of 20 lbf/ft (290 N/m) of member length, 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 the requirements of Specification A1003/A1003M.4.2 The minimum steel thickness (base steel) s
17、hall be not less than 0.0329 in. (0.84 mm).4.3 Individual measurements before the application of protective coating shall be not less than 95 % of the specified designthickness.4.4 Members shall have a protective coating in accordance with Table 1, CP 60 minimum.4.5 Edges of members shall be manufac
18、tured to minimize burrs and sharp edges.4.6 Factory punch-outs, when provided, shall be located along the centerline of the webs of members and shall havecenter-to-center spacing of not less than 24 in. (610 mm). Web punch-outs maximum width shall be the lesser of 0.5 times themember depth, d, or 21
19、2 in. (64 mm). Web punch-out length shall not exceed 412 in. (114 mm). Minimum distance between theend of the member and the near edge of the web punch-out shall be 10 in. (254 mm). The size of the factory punch-outs shall notexceed the size used in design and the center-to-center spacing shall not
20、be less than that used in design.4.7 The properties and strength of members shall be computed in accordance with the AISI S100.5. Dimensions and Permissible Variations5.1 Data for calculating design performance shall be supplied by the manufacturer.5.2 The width of the surface to which the sheathing
21、 board is attached shall be not less than 114 in. (32 mm).5.3 Runners (track) shall be formed in a U-shaped configuration, having a depth compatible with that of the studs of the samenominal size.5.4 Minimum height of runner (track) flanges shall be 114 in. (32 mm).5.5 Members shall be manufactured
22、within the limits as shown in Table 2 and Fig. 1.5.6 Bracing and bridging shall have configuration and steel thickness to provide secondary support for the studs in accordancewith the AISI S100.TABLE 1 Coating DesignationsCoatingClassificationCoatingDesignatorMinimum Coating RequirementsZinc-CoatedA
23、 Zinc IronB 55 % Al-ZincC Zinc-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 (ZGF 135)Painted Metallic PM The metallic coated substrate shall meet the requ
24、irements 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.EA Zinc-coated steel sheet as described in Specification A653/A653M.B Zinc-iron alloy-coated st
25、eel sheet as described in Specification A653/A653M.C 55 % Aluminum-zinc alloy-coated steel sheet as described in Specification A792/A792M.D Zinc-5 % aluminum alloy-coated steel sheet as described in Specification A875/A875M.E In accordance with the requirements of Specification A1003/A1003M.C955 172
26、6. Workmanship, Finish, and Appearance6.1 The steel members shall be free of defects that interfere with the purpose for which they are intended.TABLE 2 Manufacturing TolerancesDimensionA Item Checked Structural Studs, in. (mm) Structural Track, in. (mm)A length + 18 (3.18) 332 (2.38)+ 12 (12.7) 14
27、(6.35)BB web width + 132 (0.79) 132 (0.79)+ 132 (0.79)+ 18 (3.18)C flare + 116 (1.59) + 0 (0)overbend 116 (1.59) 332 (2.38)D hole center + 116 (1.59) n/awidth 116 (1.59)E hole center + 12 (12.7) n/aalong length 12 (12.7)F crown + 116 (1.59) 116 (1.59)+ 116 (1.59) 116 (1.59)GC camber 18 (3.2) max per
28、 10 ft 132 per ft (0.79)12 max (12.7)HC bow 18 (3.2) max per 10 ft 132 per ft (0.79)12 max (12.7)I twist 132 per ft (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/aA All measurements shall
29、be taken not less than 1 ft (305 mm) from the end.B Outside dimension for stud; inside for track.C 18 in. (3 mm) max per 10 ft (3000 mm) represents L/960 maximum for overall camber and bow. Thus a 20-ft (6000-mm) long member would have 14 in. (6 mm)permissible maximum; a 5-ft (1500-mm) long member w
30、ould have 116 in. (1.5 mm) permissible maximum.FIG. 1 Manufacturing TolerancesC955 1737. Inspection7.1 Inspection of the members shall be agreed upon between the purchaser and the producer or supplier as part of the purchaseagreement.8. Rejection8.1 When specified in the purchase agreement, members
31、that fail to conform to the requirements of this specification shall berejected. Rejection shall be reported to the producer or supplier promptly and in writing. The notice of rejection shall contain astatement documenting how the member has failed to conform to the requirements of this specificatio
32、n and the purchase agreement.9. Certification9.1 When specified in the purchase agreement, a producers or suppliers report shall be furnished at the time of shipmentcertifying that the product is in compliance with this specification.10. Marking and Identification10.1 See AISI S200,S240, Section A5P
33、roductA5.5Product Identification.11. Protection11.1 Material shall be protected during shipment as required. When specified in the purchase order, the members shall bepackaged in accordance with the purchasers instructions.11.2 When materials are stored outside, they shall be stacked off the ground
34、and be properly supported on a level surface.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(C955 151) that may impact the use of this standard. (Approved June
35、1, 2017.)(1) Revised title.(2) Revised Scope, Subsection 1.1.(3) Revised Section 10.1 to change reference from AISI S200, Section A5 to AISI S240, Section A5.5.(4) Revised Referenced Documents to delete AISI S200 and add AISI AS240.SUMMARY OF CHANGESCommittee C11 has identified the location of selec
36、ted changes to this standard since the last issue (C955 11c)that may impact the use of this standard. (Approved March 15, 2015.)(1) Previous subsection 1.3, Sections 5 and 8, and Fig. 1, all regarding the penetration test, were removed.ASTM International takes no position respecting the validity of
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38、evision at any time by the responsible technical 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. You
39、r comments will receive careful consideration 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 copy
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