1、Designation: C 955 09aStandard 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
2、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 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 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: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
7、 the Hot-Dip ProcessA 875/A 875M Specification for Steel 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
8、 and SystemsC 954 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:3Specification for the Design of Cold-Formed Steel StructuralMembersAISI Code of Stan
9、dard Practice for Cold-Formed SteelStructural Framing Committee on Framing Standards2006 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,accessori
10、es 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, exclusive of sheathing, of 200 lbf (890N)
11、 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 before the application of pro-tective coati
12、ng 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.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
13、 of the webs of 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
14、approved Sept. 1, 2009. Published September 2009. Originallyapproved in 1981. Last previous edition approved in 2009 as C 955 09.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume informati
15、on, 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 International
16、, 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 mm).
17、 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 memb
18、ers shall be com-puted in accordance with the AISI Specification for the Designof Cold-Formed Steel Structural 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 withou
19、t spin out (see Fig.1).6. Dimensions and Permissible Variations6.1 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-sha
20、ped configu-ration, having a depth compatible with that of the studs of thesame nominal size.6.4 Minimum height 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 stee
21、lthickness to provide secondary support for the studs in accor-dance with the AISI Specification for the Design 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.8. P
22、enetration Test8.1 Significance and 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
23、serviceperformance has not been determined.8.2 Apparatus shall satisfy the following: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 CP 60 G 60
24、 (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 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
25、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 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 S
26、pecification A 792/A 792M.DZinc-5 % aluminum alloy-coated steel sheet as described in Specification A 875/A 875M.EIn accordance with the requirements of Specification A 1003/A 1003M.FIG. 1 StudsTABLE 2 Manufacturing TolerancesDimensionAItem CheckedStructural Studs,in. (mm)Structural Track,in. (mm)A
27、length +332 (2.38) +12 (12.7)332 (2.38) 14 (6.35)BBweb width +132 (0.79) +132 (0.79)132 (0.79) +18 (3.18)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
28、)GCcamber18 (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 tra
29、ck.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.C 955 09a28.2.1 Electric Drill capable of 2500 r/min
30、(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 954, 1 in. (25.4 mm) long.8.3.3 Kraft Paper, 0.010 in. (0.25 mm) thick.8.4 SamplingOne member
31、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 in. (460 mm) long.8.5.2 For each test, one piece of gypsum board, 6-in.(152-mm) square, shall b
32、e 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 specimens of members shall be tested.8.6.2 If more than one test specimen fails to meet therequirement
33、s, 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 spin out; or shall indicate allspecimens failing if the screw did not penetrate the steel, or the
34、screw 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 specified in the procedure.9. Inspection9.1 Inspection of the members shall be agreed upon betw
35、eenthe 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 specificationshall be rejected. Rejection shall be reported to the producer orsupplier promptly and in wr
36、iting. The notice of rejection shallcontain a statement documenting how the member has failed toconform to the requirements of this specification and thepurchase agreement.11. Certification11.1 When specified in the purchase agreement, a produc-ers or suppliers report shall be furnished at the time
37、ofshipment certifying that the product is in compliance with thisspecification.FIG. 2 Manufacturing TolerancesC 955 09a312. Marking and Identification12.1 Groups of like members shall be marked with a label,or a tag attached thereto. Marking shall include the rollformersidentification (name, logo, o
38、r 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 referenced in 12.1, indi-vidual members shall have a legible label, stencil, or emboss-ment
39、, 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 thickness, in mils or inches,exclusive of protective coatings.12.2.3 The minimum yield strength
40、 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 likemembers is employed, the standard color-coding in Table 3shall be used.13. Protection13.
41、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 and stored in accordancewith AISI COSP, paragraph F3.14. Keywords14.1 runners; screws; sectio
42、n properties; studs; thicknessSUMMARY OF CHANGESCommittee C11 has identified the location of selected changes to this specification since the last issue,C 955 09, that may impact the use of this specification. (Approved September 1, 2009)(1) Added metric equivalents to Table 1 for Painted MetallicMi
43、nimum Coating Requirements.(2) Added metric equivalents to Footnote C of Table 2.Committee C11 has identified the location of selected changes to this specification since the last issue,C 955 08a, that may impact the use of this specification. (Approved May 1, 2009)(1) Revised camber and bow toleran
44、ces in Table 2.(2) Added new Footnote C in Table 2.Committee C11 has identified the location of selected changes to this specification since the last issue,C 955 08, that may impact the use of this specification. (Approved September 1, 2008)(1) Deleted CP40 coatings, Painted coatings, and Footnote F
45、from Table 1.(2) Deleted ISO 9223 from Referenced Documents.Committee 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. (Approved March 1, 2008)(1) Added metric equivalents in Table 1.TABLE 3 Color
46、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)C 955 09a4ASTM International takes no position respecting the validity o
47、f 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 responsibility.This standard is subject to
48、 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 addressed to ASTM International Headquarters.
49、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 the 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 A
