ASTM C955-08

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Designation: C 955 – 08
Standard Specification for
Load-Bearing (Transverse and Axial) Steel Studs, Runners
(Tracks), and Bracing or Bridging for Screw Application of
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Gypsum Panel Products and Metal Plaster Bases
This standard is issued under the fixed designation C 955; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope* C 954 Specification for Steel Drill Screws for the Applica-
tion of Gypsum Panel Products or Metal Plaster Bases to
1.1 This specification covers steel studs, runners (tracks),
Steel Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84
and bracing or bridging (with a base metal thickness range of
mm) in Thickness
not less than 0.0329 in. (0.836 mm)) for screw application of
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2.2 AISI Standard:
gypsum panel products and metal plaster bases in load-bearing
SpecificationfortheDesignofCold-FormedSteelStructural
(transverse and axial) construction assemblies. Steel of lesser
Members
thickness shall be permitted in additional engineered products.
AISI Code of Standard Practice for Cold-Formed Steel
1.2 The values stated in inch-pound units are to be regarded
Structural Framing Committee on Framing Standards—
as the standard.The SI (metric) values given in parentheses are
2006 Edition
provided for information purposes only.
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2.3 ISO Standard:
1.3 The following precautionary caveat pertains only to the
ISO 9223 Corrosion of Metals and Alloys—Corrosivity of
test method portion, Section 8, of this specification: This
Atmosphers—Classification
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user
3. Terminology
of this standard to establish appropriate safety and health
3.1 Definitions: Definitions shall be in accordance with
practices and determine the applicability of regulatory limita-
TerminologyC11.
tions prior to use.
3.2 Definitions of Terms Specific to This Standard:
2. Referenced Documents 3.2.1 members, n—studs, runners, tracks, bracing, bridging,
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accessories or other items manufactured in accordance with
2.1 ASTM Standards:
this standard.
A 653/A 653M Specification for Steel Sheet, Zinc-Coated
3.2.2 structural member, n—a member in a steel framed
(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)
system in which the loading exceeds any of the following
by the Hot-Dip Process
conditions: a transverse load of 20 lbf/ft (290 N/m) of member
A 792/A 792M Specification for Steel Sheet, 55 %
length, or an axial load, exclusive of sheathing, of 200 lbf (890
Aluminum-Zinc Alloy-Coated by the Hot-Dip Process
N) per member.
A 875/A 875M Specification for Steel Sheet, Zinc-5 %
Aluminum Alloy-Coated by the Hot-Dip Process
4. Materials and Manufacture
A 1003/A 1003M Specification for Steel Sheet, Carbon,
4.1 Members shall be manufactured from steel meeting the
Metallic- and Nonmetallic-Coated for Cold-Formed Fram-
requirements of Specification A 1003/A 1003M.
ing Members
4.2 The minimum steel thickness (base steel) shall be not
C11 Terminology Relating to Gypsum and Related Build-
less than 0.0329 in. (0.84 mm).
ing Materials and Systems
4.3 Individual measurements before the application of pro-
tective coating shall be not less than 95 % of the specified
design thickness.
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This specification is under the jurisdiction of ASTM Committee C11 on
4.4 Members shall have a protective coating in accordance
GypsumandRelatedBuildingMaterialsandSystemsandisthedirectresponsibility
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and
with Table 1, CP 60 minimum.
Related Products.
Current edition approved March 1, 2008. Published March 2008. Originally
approved in 1981. Last previous edition approved in 2007 as C 955 - 07.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from American Iron and Steel Institute (AISI), 1140 Connecticut
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Ave., NW, Suite 705, Washington, DC 20036, http://www.steel.org.
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Standards volume information, refer to the standard’s Document Summary page on Available from International Organization for Standardization (ISO), 1 rue de
the ASTM website. Varembé, Case postale 56, CH-1211, Geneva 20, Switzerland, http://www.iso.ch.
*A Summary of Changes section appears at the end of this standard.
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C955–08
TABLE 1 Coating Designations
Minimum Coating Requirements
Coating Coating
A B C D
Zinc-Coated Zinc Iron 5
...