1、Designation: C 955 06Standard 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:Specification for the Design of Cold-Formed Steel StructuralMembers32.3 ISO Standard:ISO 9223 Corrosion of Metals and AlloysCorrosivity o
9、fAtmosphersClassification43. 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 items manufactured in accordance withthis standard.3.2.2 s
10、tructural 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.4. Materials and Manufacture4.1 Members shall be manufactu
11、red 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 coating shall be not less than 95 % of the specifieddesign thickness.4.4 Me
12、mbers 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 and Systems and is the direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accesso
13、ries andRelated Products.Current edition approved June 1, 2006. Published June 2006. Originallyapproved in 1981. Last previous edition approved in 2003 as C 955 - 03.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual B
14、ook of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Iron and Steel Institute (AISI), 1140 ConnecticutAve., Suite 705, Washington, DC 20036.4Available from International Organization for Standardization (ISO), 1 rue deVarem
15、b, Case postale 56, CH-1211, Geneva 20, Switzerland.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 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 sha
16、rp 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-outs maximum width shall be the lesser of 0.5 times themember depth, d, or 212 in. (64 mm). Web punch-out leng
17、thshall 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 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
18、 The properties and strength of members 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 thesurfac
19、e of the gypsum panel product without 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 Runner
20、s (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 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 bridgi
21、ng shall have configuration and steelthickness 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 purp
22、ose for which they are intended.8. Penetration 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. ItTABLE 1 Coating DesignationsCoatingClassificationCoatingDesignatorMinimum Coa
23、ting RequirementsZinc-CoatedAZinc IronB55 % Al-ZincCZinc-5 %DMetallic Coated CP 40 G 40 A 40 AZ 50 GF 30CP 60 G 60 A 60 AZ 50 GF 30CP 90 G 90 Not Applicable AZ 50 GF 45Painted Metallic PM The metallic coated substrate shall meet the requirements of metallic coated. In addition, the paint film shallh
24、ave 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 roll forming and shall have a minimum paint thickness of1.0 mil on all surfaces including edges. Use of painted produ
25、ct 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, Category 1 and 2.E,FAZinc-coated steel sheet as described in Specification A 653/A 653M.BZinc-iron alloy-coated steel shee
26、t 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 described in Specification A 875/A 875M.EIn accordance with the requirements of Specification A 1003/A 1003M.FISO 9223.F
27、IG. 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 (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
28、.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 (12.7)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 (
29、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.C955062shall be used to determine compliance with this specification.The degree of performance of this test method with serviceperformance has not been determined
30、.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 954, 1 i
31、n. (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 in. (460
32、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 specimens of mem
33、bers 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 spin out; o
34、r 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 specified
35、 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 specificationshall
36、be rejected. Rejection shall be reported to the producer orsupplier promptly and in writing. The notice of rejection shallFIG. 2 Manufacturing TolerancesC955063contain a statement documenting how the member has failed toconform to the requirements of this specification and thepurchase agreement.11.
37、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,or a tag a
38、ttached 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 referenc
39、ed 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 thickness, i
40、n 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 likemembe
41、rs is employed, the standard color-coding in Table 3shall be used.13. Protection13.1 Material shall be protected during shipment and stor-age as required. When specified in the purchase order, the stud,runner, bracing, or bridging shall be packaged in accordancewith the purchasers instructions.14. K
42、eywords14.1 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 03, that may impact the use of this specification. (Approved June 1, 2006)(1) Revised 12.2.(2) Revised 12.
43、3.ASTM International takes 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, a
44、re entirely their own responsibility.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 stand
45、ardsand should be addressed 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 Commi
46、ttee 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 ASTM at the aboveaddres
47、s or at 610-832-9585 (phone), 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)C955064
