1、Designation: C 955 08Standard 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 C 955; the number immediately following t
2、he 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification co
3、vers steel studs, runners (tracks),and bracing or bridging (with a base metal thickness range ofnot 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 the standard. The SI (metric) values given in parentheses areprovided for information purposes only.1.3 The following precautionary caveat pertains only to thetest method portion, Section 8, of
5、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 applicability of regulatory limita-tions prior to use.2.
6、 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 792/A 792M Specification for Steel Sheet, 55 %Aluminum-Zinc Alloy-Coated by the Hot-Dip ProcessA 875/A 875M Specification for S
7、teel Sheet, Zinc-5 %Aluminum Alloy-Coated by the Hot-Dip ProcessA 1003/A 1003M Specification for Steel Sheet, Carbon,Metallic- and Nonmetallic-Coated for Cold-Formed Fram-ing MembersC11 Terminology Relating to Gypsum and Related Build-ing Materials and SystemsC 954 Specification for Steel Drill Scre
8、ws 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:3Specification for the Design of Cold-Formed Steel StructuralMembersAISI Code of Standard Practice for Cold-Formed SteelStructural Framin
9、g Committee on Framing Standards2006 Edition2.3 ISO Standard:4ISO 9223 Corrosion of Metals and AlloysCorrosivity ofAtmosphersClassification3. Terminology3.1 Definitions: Definitions shall be in accordance withTerminology C11.3.2 Definitions of Terms Specific to This Standard:3.2.1 members, nstuds, r
10、unners, tracks, bracing, bridging,accessories or other 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
11、, exclusive of sheathing, of 200 lbf (890N) per member.4. Materials and Manufacture4.1 Members shall be manufactured from steel meeting therequirements of Specification A 1003/A 1003M.4.2 The minimum steel thickness (base steel) shall be notless than 0.0329 in. (0.84 mm).4.3 Individual measurements
12、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 in accordancewith Table 1, CP 60 minimum.1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials
13、and Systems and is the direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accessories andRelated Products.Current edition approved March 1, 2008. Published March 2008. Originallyapproved in 1981. Last previous edition approved in 2007 as C 955 - 07.2For referenced AST
14、M 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 American Iron and Steel Institute (AISI), 1140 ConnecticutAve.,
15、NW, Suite 705, Washington, DC 20036, http:/www.steel.org.4Available from International Organization for Standardization (ISO), 1 rue deVaremb, Case postale 56, CH-1211, Geneva 20, Switzerland, http:/www.iso.ch.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.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 spa
17、cing 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 mm). Minimum distance betweenthe end of the member and the near edge of the web punch-outshall be 10 in. (254
18、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 Specification for the Designof Cold-Formed Steel Struct
19、ural Members.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 Variations6.1 Data for calculating design performance
20、 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 the studs of thesame nominal size.6.4 Minimum h
21、eight of runner (track) flanges shall be34 in.(19 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 accor-dance with the AISI Specification for the D
22、esign of Cold-Formed Steel Structural Members.7. Workmanship, Finish, and Appearance7.1 The steel members shall be free of defects that interferewith the purpose for which they are intended.TABLE 1 Coating DesignationsCoatingClassificationCoatingDesignatorMinimum Coating RequirementsZinc-CoatedAZinc
23、 IronB55 % Al-ZincCZinc-5 %Doz/ft2(g/m2) oz/ft2(g/m2) oz/ft2(g/m2) oz/ft2(g/m2)Metallic Coated CP 40 G 40 (Z 120) A 40 (ZF 120) AZ 50 (AZM 150) GF 30 (ZGF 90)CP 60 G 60 (Z 180) A 60 (ZF 180) AZ 50 (AZM 150) GF 30 (ZGF 90)CP 90 G 90 (Z 275) Not Applicable AZ 50 (AZM 150) GF 45 (ZGF 135)Painted Metall
24、ic 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 per side (primer plus topcoat) with a minimum primer thickness of 0.1 milper side.EPainted PTD Non-metallic coated substrate shall be painted after
25、 roll forming and shall have a minimum paint thickness of1.0 mil on all surfaces including edges. Use of painted product is limited to environments where the rate ofcorrosion is low; typically areas such as interiors of buildings and areas of low rainfall and low humidity asdefined by ISO 9223, Cate
26、gory 1 and 2.E,FAZinc-coated steel sheet as described in Specification A 653/A 653M.BZinc-iron alloy-coated steel sheet as described in Specification A 653/A 653M.C55 % Aluminum-zinc alloy-coated steel sheet as described in Specification A 792/A 792M.DZinc-5 % aluminum alloy-coated steel sheet as de
27、scribed in Specification A 875/A 875M.EIn accordance with the requirements of Specification A 1003/A 1003M.FISO 9223.FIG. 1 StudsTABLE 2 Manufacturing TolerancesDimensionAItem CheckedStructural Studs,in. (mm)Structural Track,in. (mm)A length +332 (2.38) +12 (12.7)332 (2.38) 14 (6.35)BBweb width +132
28、 (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) 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)G camber132 per ft (0.79)132 per ft (0.79)12 max (12.7)12 max (1
29、2.7)H bow132 per ft (0.79)132 per ft (0.79)12 max (12.7)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.C9550828. Penetration Test8.1 Significance a
30、nd UseThis test method provides aprocedure for evaluating the members ability to pull the 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 d
31、etermined.8.2 Apparatus shall satisfy the following:8.2.1 Electric Drill capable of 2500 r/min (free spindlespeed), supplied with a screw driving bit to fit the screw usedin the test.8.3 Materials shall satisfy the following:8.3.1 Gypsum Board, Type X,58 in. (16 mm) thick.8.3.2 ScrewsSpecification C
32、 954, 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 member to be tested shall be cut into testspecimens not less than 18
33、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)square shall be cut.8.6 Number of Tests and Retests:8.6.1 Five specime
34、ns 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 specification if the screw penetrated thesteel and the screw did not sp
35、in 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 merelystates whether or not there is conformance to the criteria forsuccess
36、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 agreement, membersthat fail to conform to the requirements of this specificat
37、ionshall be rejected. Rejection shall be reported to the producer orsupplier promptly and in writing. The notice of rejection shallFIG. 2 Manufacturing TolerancesC955083contain a statement documenting how the member has failed toconform to the requirements of this specification and thepurchase agree
38、ment.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 Groups of like members shall be marked with a label,o
39、r a tag attached thereto. Marking shall include the rollformersidentification (name, logo, or initials), length, quantity, androllformers member designator including member depth,flange size, and minimum steel thickness in mils or inchesexclusive of protective coating.12.2 In addition to the marking
40、 referenced in 12.1, indi-vidual members shall have a legible label, stencil, or emboss-ment, at a maximum distance of 96 in. (2440 mm) on center, onthe member, with the following minimum information:12.2.1 The rollformers identification (that is, name, logo, orinitials).12.2.2 The minimum steel thi
41、ckness, in mils or inches,exclusive of protective coatings.12.2.3 The minimum yield strength in kip per square inch(megapascals).12.2.4 The minimum protective coating shall be indicatedwith the appropriate coating designator in accordance withTable 1.12.3 Where color-coding of members or bundles of
42、likemembers is employed, the standard color-coding in Table 3shall be used.13. 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 Material shall be received a
43、nd stored in accordancewith AISI COSP, paragraph F3.14. 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,C 955 07, that may impact the use of this specification
44、. (Approved March 1, 2008)(1) Added metric equivalents in Table 1.Committee C11 has identified the location of selected changes to this specification since the last issue,C 955 06, that may impact the use of this specification. (Approved November 1, 2007)(1) Revised Section 13.ASTM International tak
45、es no position respecting the validity of any patent 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 re
46、sponsibility.This standard is subject to revision 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 addres
47、sed to ASTM International Headquarters. Your 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 th
48、e address shown below.This standard is copyrighted 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 (ph
49、one), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE 3 Color Codes for MembersColorMinimum Base MetalThickness, milsMinimum Decimal Equivalent,in. (mm)White 33 0.0329 (0.836)Yellow 43 0.0428 (1.087)Green 54 0.0538 (1.367)Orange 68 0.0677 (1.720)Red 97 0.0966 (2.454)Blue 118 0.1180 (2.997)C955084
