1、Designation: C955 11bStandard 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 th
2、e 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 cove
3、rs 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 p
4、ermitted 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.1.3 The following precautionary caveat per
5、tains only to thetest method portion, Section 8, 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 healthpractices and determine the appl
6、icability of regulatory limita-tions 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 the Hot-Dip ProcessA792/A792M Specification for Steel Sheet, 55 %Aluminum-Zinc Alloy-Coated by the
7、 Hot-Dip ProcessA875/A875M Specification for Steel Sheet, Zinc-5 % Alu-minum Alloy-Coated by the Hot-Dip ProcessA1003/A1003M Specification for Steel Sheet, Carbon,Metallic- and Nonmetallic-Coated for Cold-Formed Fram-ing MembersC11 Terminology Relating to Gypsum and Related BuildingMaterials and Sys
8、temsC954 Specification for Steel Drill Screws for the Applica-tion of Gypsum Panel Products or Metal Plaster Bases toSteel Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84mm) in Thickness2.2 AISI Standard:3S100 North American Specification for the Design of Cold-Formed Steel Structural MembersS200
9、North American Standard for Cold-Formed SteelFraming General Provisions 2007 Edition3. Terminology3.1 Definitions: Definitions shall be in accordance withTerminology C11.3.2 Definitions of Terms Specific to This Standard:3.2.1 members, nstuds, runners, tracks, bracing, bridging,accessories or other
10、items manufactured in accordance withthis standard.3.2.2 structural member, na member in a steel 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 (890N) per member.
11、4. Materials and Manufacture4.1 Members shall be manufactured from steel meeting therequirements 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 no
12、t less than 95 % of the specifieddesign thickness.4.4 Members shall have a protective coating 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 o
13、f members and shall have1This 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.Current edition approved Oct.
14、1, 2011. Published October 2011. Originallyapproved in 1981. Last previous edition approved in 2011 as C95511a. DOI:10.1520/C0955-11B.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume info
15、rmation, 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.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM Internat
16、ional, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.center-to-center spacing of not less than 24 in. (610 mm). Webpunch-outs maximum width shall be the lesser of 0.5 times themember depth, d, or 212 in. (64 mm). Web punch-out lengthshall not exceed 412 in. (114
17、 mm). Minimum distance betweenthe end of the member and the near edge of the web punch-outshall 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
18、 members shall be com-puted in accordance with the AISI S100.5. Performance Requirements5.1 When tested in accordance with Section 8, membersshall be capable of pulling the head of the screw below thesurface of the gypsum panel product without spin out (see Fig.1).6. Dimensions and Permissible Varia
19、tions6.1 Data for calculating design performance shall be sup-plied by the manufacturer.6.2 The width of the surface to which the sheathing board isattached shall be not less than 114 in. (32 mm).6.3 Runners (track) shall be formed in a U-shaped configu-ration, having a depth compatible with that of
20、 the studs of thesame nominal size.6.4 Minimum height of runner (track) flanges shall be 114in. (32 mm).6.5 Members shall be manufactured within the limits asshown in Table 2 and Fig. 2.6.6 Bracing and bridging shall have configuration and steelthickness to provide secondary support for the studs in
21、 accor-dance with the AISI S100.7. Workmanship, Finish, and Appearance7.1 The steel members shall be free of defects that interferewith the purpose for which they are intended.8. Penetration Test8.1 Significance and UseThis test method provides aprocedure for evaluating the members ability to pull t
22、he headof a screw below the surface of the gypsum panel product. Itshall be used to determine compliance with this specification.The degree of performance of this test method with serviceperformance has not been determined.8.2 Apparatus shall satisfy the following:8.2.1 Electric Drill capable of 250
23、0 r/min (free spindlespeed), supplied with a screw driving bit to fit the screw usedin the test.TABLE 1 Coating DesignationsCoatingClassificationCoatingDesignatorMinimum 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
24、 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 requirements of metallic coated. In addition, the paint film shallhave a minimum thickness of 0.5 mil (0.013
25、mm) per side (primer plus topcoat) with a minimum primerthickness of 0.1 mil (0.0002 mm) per side.EAZinc-coated steel 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
26、in Specification A792/A792M.DZinc-5 % aluminum alloy-coated steel sheet as described in Specification A875/A875M.EIn accordance with the requirements of Specification A1003/A1003M.FIG. 1 StudsTABLE 2 Manufacturing TolerancesDimensionAItem CheckedStructural Studs,in. (mm)Structural Track,in. (mm)A le
27、ngth +332 (2.38) +12 (12.7)332 (2.38) 14 (6.35)BBweb width +132 (0.79) +132 (0.79)132 (0.79) +18 (3.2)C flare +116 (1.59) + 0 (0)overbend 116 (1.59) 332 (2.38)D hole center +116 (1.59) NAwidth 116 (1.59)E hole center +14 (6.35) NAlength 14 (6.35)F crown +116 (1.59) +116 (1.59)116 (1.59) 116 (1.59)GC
28、camber18 (3.2) maxper 10 ft132 per ft (0.79)12 max (12.7)HCbow18 (3.2) maxper 10 ft132 per ft (0.79)12 max (12.7)I twist132 per ft (0.79)132 per ft (0.79)12 max (12.7)12 max (12.7)AAll measurements shall be taken not less than 1 ft (305 mm) from the end.BOutside dimension for stud; inside for track.
29、C 18 in. (3 mm) max per 10 ft (3000 mm) represents L/960 maximum for overallcamber 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 11b28.3 Materials shall satisfy the following:8.3.1
30、 Gypsum Board, Type X,58 in. (16 mm) thick.8.3.2 ScrewsSpecification C954, 1 in. (25.4 mm) long.8.3.3 Kraft Paper, 0.010 in. (0.25 mm) thick.8.4 SamplingOne member shall be selected from eachbundle or package but not more than ten from any oneshipment for testing.8.5 Specimen Preparation:8.5.1 Each
31、member to be tested shall be cut into testspecimens not less than 18 in. (460 mm) long.8.5.2 For each test, one piece of gypsum board, 6-in.(152-mm) square, shall be cut not less than 12 in. (305 mm)from the edge or end of the wallboard.8.5.3 For each test, four pieces of kraft paper, 2-in. (51-mm)s
32、quare shall be cut.8.6 Number of Tests and Retests:8.6.1 Five specimens of members shall be tested.8.6.2 If more than one test specimen fails to meet therequirements, two more test specimens shall be chosen forretesting.8.7 ReportReport shall indicate all specimens meeting therequirements of this sp
33、ecification if the screw penetrated thesteel and the screw did not spin out; or shall indicate allspecimens failing if the screw did not penetrate the steel, or thescrew spun out.8.8 Precision and BiasNo statement is made about eitherthe precision or bias of this test method since the result merelys
34、tates whether or not there is conformance to the criteria forsuccess specified in the procedure.9. Inspection9.1 Inspection of the members shall be agreed upon betweenthe purchaser and the producer or supplier as part of thepurchase agreement.10. Rejection10.1 When specified in the purchase agreemen
35、t, 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 shallcontain a statement documenting how the member has failed toconform to the requirements of this spec
36、ification and thepurchase agreement.11. Certification11.1 When specified in the purchase agreement, a produc-ers or suppliers report shall be furnished at the time ofshipment certifying that the product is in compliance with thisspecification.12. Marking and Identification12.1 See AISI S200, Section
37、 A5 - Product Identification.FIG. 2 Manufacturing TolerancesC955 11b313. Protection13.1 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.13.2 When materials are stored outside,
38、 they shall bestacked off the ground and be properly supported on a levelsurface.14. Keywords14.1 runners; screws; section properties; studs; thicknessSUMMARY OF CHANGESCommittee C11 has identified the location of selected changes to this specification since the last issue,C95511a, that may impact t
39、he use of this specification. (Approved Oct. 1, 2011)(1) Deleted Sections 12.1 through 12.3 and Table 3, and addednew Section 12.1.(2) Revised Section 2.Committee C11 has identified the location of selected changes to this specification since the last issue,C95511, that may impact the use of this sp
40、ecification. (Approved Aug. 1, 2011)(1) Replaced text in 13.2.(2) Deleted AISI COSP from 2.2.Committee C11 has identified the location of selected changes to this specification since the last issue,C95510, that may impact the use of this specification. (Approved May 15, 2011)(1) Revised 1.1.Committe
41、e C11 has identified the location of selected changes to this specification since the last issue,C95509a, that may impact the use of this specification. (Approved December 1, 2010)(1) Revised 6.4.Committee C11 has identified the location of selected changes to this specification since the last issue
42、,C95509, that may impact the use of this specification. (Approved September 1, 2009)(1) Added metric equivalents to Table 1 for Painted MetallicMinimum Coating Requirements.(2) Added metric equivalents to Footnote C of Table 2.ASTM International takes no position respecting the validity of any paten
43、t rights asserted in connection 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 a
44、t 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. Your commen
45、ts 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 copyrighted
46、by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C955 11b4
