ASTM C955-06
(Specification)Standard Specification for Load-Bearing (Transverse and Axial) Steel Studs, Runners (Tracks), and Bracing or Bridging for Screw Application of Gypsum Panel Products and Metal Plaster Bases
Standard Specification for Load-Bearing (Transverse and Axial) Steel Studs, Runners (Tracks), and Bracing or Bridging for Screw Application of Gypsum Panel Products and Metal Plaster Bases
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1.1 This specification covers steel studs, runners (tracks), and bracing or bridging (with a base metal thickness range of not less than 0.0329 in. (0.836 mm)) for screw application of gypsum panel products and metal plaster bases in load-bearing (transverse and axial) construction assemblies. Steel of lesser thickness shall be permitted in additional engineered products.
1.2 The values stated in inch-pound units are to be regarded as the standard. The SI (metric) values given in parentheses are provided for information purposes only.
The following precautionary caveat pertains only to the test method portion, Section 8, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: C 955 – 06
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* C11 Terminology Relating to Gypsum and Related Build-
ing Materials and Systems
1.1 This specification covers steel studs, runners (tracks),
C 954 Specification for Steel Drill Screws for the Applica-
and bracing or bridging (with a base metal thickness range of
tion of Gypsum Panel Products or Metal Plaster Bases to
not less than 0.0329 in. (0.836 mm)) for screw application of
Steel Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84
gypsum panel products and metal plaster bases in load-bearing
mm) in Thickness
(transverse and axial) construction assemblies. Steel of lesser
2.2 AISI Standard:
thickness shall be permitted in additional engineered products.
SpecificationfortheDesignofCold-FormedSteelStructural
1.2 The values stated in inch-pound units are to be regarded
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Members
as the standard.The SI (metric) values given in parentheses are
2.3 ISO Standard:
provided for information purposes only.
ISO 9223 Corrosion of Metals and Alloys—Corrosivity of
1.3 The following precautionary caveat pertains only to the
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Atmosphers—Classification
test method portion, Section 8, of this specification: This
standard does not purport to address all of the safety concerns,
3. Terminology
if any, associated with its use. It is the responsibility of the user
3.1 Definitions: Definitions shall be in accordance with
of this standard to establish appropriate safety and health
TerminologyC11.
practices and determine the applicability of regulatory limita-
3.2 Definitions of Terms Specific to This Standard:
tions prior to use.
3.2.1 members, n—studs, runners, tracks, bracing, bridging,
2. Referenced Documents accessories or other items manufactured in accordance with
2 this standard.
2.1 ASTM Standards:
3.2.2 structural member, n—a member in a steel framed
A 653/A 653M Specification for Steel Sheet, Zinc-Coated
system in which the loading exceeds any of the following
(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)
conditions: a transverse load of 20 lbf/ft (290 N/m) of member
by the Hot-Dip Process
length, or an axial load, exclusive of sheathing, of 200 lbf (890
A 792/A 792M Specification for Steel Sheet, 55 %
N) per member.
Aluminum-Zinc Alloy-Coated by the Hot-Dip Process
A 875/A 875M Specification for Steel Sheet, Zinc-5 %
4. Materials and Manufacture
Aluminum Alloy-Coated by the Hot-Dip Process
4.1 Members shall be manufactured from steel meeting the
A 1003/A 1003M Specification for Steel Sheet, Carbon,
requirements of Specification A 1003/A 1003M.
Metallic- and Nonmetallic-Coated for Cold-Formed Fram-
4.2 The minimum steel thickness (base steel) shall be not
ing Members
less 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 specified
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This specification is under the jurisdiction of ASTM Committee C11 on design thickness.
GypsumandRelatedBuildingMaterialsandSystemsandisthedirectresponsibility
4.4 Members shall have a protective coating in accordance
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and
with Table 1, CP 60 minimum.
Related Products.
Current edition approved June 1, 2006. Published June 2006. Originally
approved in 1981. Last previous edition approved in 2003 as C 955 - 03.
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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., Suite 705, Washington, DC 20036.
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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.
*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.
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C955–06
TABLE 1 Coating Designations
Minimum Coating Requirements
Coating Coating
A B C D
Classification Designator
Zinc-Coated Zinc Iron 55 % Al-Zinc Zinc-5 %
Metallic Coated CP 40 G 40 A 40 AZ 50 GF 30
CP 60 G 60 A 60 AZ 50 GF 30
CP 90 G 90 Not Applicable AZ 50 GF 45
Painted
...
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