ASTM C955-15
(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
ABSTRACT
This specification covers steel studs, runners (tracks), and bracing or bridging for screw application of gypsum panel products and metal plaster bases in load-bearing construction assemblies. Steel of lesser thickness shall be permitted in additional engineered products. Members shall be manufactured from steel meeting the requirements specified. The properties and strength of members shall be computed in accordance with the given specification. The steel members shall be free of defects that interfere with the purpose for which they are intended. Penetration test method provides a procedure for evaluating the member's ability to pull the head of a screw below the surface of the gypsum panel product. Five specimens of members shall be tested. If more than one test specimen fails to meet the requirements, two more test specimens shall be chosen for retesting. Report shall indicate all specimens meeting the requirements of this specification if the screw penetrated the steel and the screw spin out; or shall indicate all specimens failing if the screw did not penetrate the steel, or the screw spun out.
SCOPE
1.1 This specification covers steel studs, runners (tracks), and bracing or bridging (with a base steel minimum thickness 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 standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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Designation:C955 −15
StandardSpecification for
Load-Bearing (Transverse and Axial) Steel Studs, Runners
(Tracks), and Bracing or Bridging for Screw Application of
1
Gypsum Panel Products and Metal Plaster Bases
This standard is issued under the fixed designation C955; 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 (´) indicates an editorial change since the last revision or reapproval.
3
1. Scope* 2.2 AISI Standard:
S100 North American Specification for the Design of Cold-
1.1 This specification covers steel studs, runners (tracks),
Formed Steel Structural Members
and bracing or bridging (with a base steel minimum thickness
S200 North American Standard for Cold-Formed Steel
ofnotlessthan0.0329in.(0.836mm))forscrewapplicationof
Framing—General Provisions—2007 Edition
gypsum panel products and metal plaster bases in load-bearing
(transverse and axial) construction assemblies. Steel of lesser
3. Terminology
thickness shall be permitted in additional engineered products.
3.1 Definitions:
1.2 The values stated in inch-pound units are to be regarded
3.1.1 Definitions shall be in accordance with Terminology
as standard. The values given in parentheses are mathematical
C11.
conversions to SI units that are provided for information only
3.2 Definitions of Terms Specific to This Standard:
and are not considered standard.
3.2.1 members, n—studs, runners, tracks, bracing, bridging,
accessories, or other items manufactured in accordance with
2. Referenced Documents
this standard.
2
2.1 ASTM Standards:
3.2.2 structural member, n—a member in a steel framed
A653/A653M 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
A792/A792M Specification for Steel Sheet, 55 %
(890 N) per member.
Aluminum-Zinc Alloy-Coated by the Hot-Dip Process
A875/A875M Specification for Steel Sheet, Zinc-5 % Alu-
4. Materials and Manufacture
minum Alloy-Coated by the Hot-Dip Process
4.1 Members shall be manufactured from steel meeting the
A1003/A1003M Specification for Steel Sheet, Carbon,
requirements of Specification A1003/A1003M.
Metallic- and Nonmetallic-Coated for Cold-Formed
4.2 The minimum steel thickness (base steel) shall be not
Framing Members
less than 0.0329 in. (0.84 mm).
C11 Terminology Relating to Gypsum and Related Building
Materials and Systems
4.3 Individual measurements before the application of pro-
C954 SpecificationforSteelDrillScrewsfortheApplication
tective coating shall be not less than 95 % of the specified
of Gypsum Panel Products or Metal Plaster Bases to Steel
design thickness.
Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in
4.4 Members shall have a protective coating in accordance
Thickness
with Table 1, CP 60 minimum.
4.5 Edges of members shall be manufactured to minimize
1
This specification is under the jurisdiction of ASTM Committee C11 on
burrs and sharp edges.
Gypsum and Related Building Materials and Systems and is the direct responsibility
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and 4.6 Factory punch-outs, when provided, shall be located
Related Products.
along the centerline of the webs of members and shall have
Current edition approved March 15, 2015. Published April 2015. Originally
center-to-center spacing of not less than 24 in. (610 mm). Web
approved in 1981. Last previous edition approved in 2011 as C955 – 11c. DOI:
punch-outs maximum width shall be the lesser of 0.5 times the
10.1520/C0955-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from American Iron and Steel Institute (AISI), 1140 Connecticut
the ASTM website. Ave., NW, Suite 705, Washington, DC 20036, http://www.steel.org.
*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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C955−15
TABLE 1 Coating Designations
Minimum Coating Requirements
Coating Coating
A B C D
Zinc-Coated Zinc Iron 55 % Al-Zinc Zinc-5 %
Classification Designator
2 2 2 2 2 2 2 2
oz/ft (g ⁄m ) oz/ft (g ⁄m ) oz/ft (g ⁄m ) oz/ft (g ⁄m )
Metallic Coated CP 60 G60 (Z 180) A60 (ZF 180) AZ 50 (AZM 150) GF 30 (ZGF 90)
CP 90 G90 (Z 275) Not Applicable AZ 50 (AZM 150) GF 45 (ZGF 135)
Painted Metallic
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C955 − 11c C955 − 15
Standard Specification for
Load-Bearing (Transverse and Axial) Steel Studs, Runners
(Tracks), and Bracing or Bridging for Screw Application of
1
Gypsum Panel Products and Metal Plaster Bases
This standard is issued under the fixed designation C955; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers steel studs, runners (tracks), and bracing or bridging (with a base steel minimum thickness 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 standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the
Hot-Dip Process
A792/A792M Specification for Steel Sheet, 55 % Aluminum-Zinc Alloy-Coated by the Hot-Dip Process
A875/A875M Specification for Steel Sheet, Zinc-5 % Aluminum Alloy-Coated by the Hot-Dip Process
A1003/A1003M Specification for Steel Sheet, Carbon, Metallic- and Nonmetallic-Coated for Cold-Formed Framing Members
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C954 Specification for Steel Drill Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Steel Studs
from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in Thickness
3
2.2 AISI Standard:
S100 North American Specification for the Design of Cold-Formed Steel Structural Members
S200 North American Standard for Cold-Formed Steel Framing – General Provisions – 2007 Framing—General Provisions—
2007 Edition
3. Terminology
3.1 Definitions:Definitions
3.1.1 Definitions shall be in accordance with Terminology C11. shall be in accordance with Terminology C11.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 members, n—studs, runners, tracks, bracing, bridging, accessories, or other items manufactured in accordance with this
standard.
3.2.2 structural member, n—a member in a steel framed system in which the loading exceeds any of the following conditions:
a transverse load of 20 lbf/ft (290 N/m) of member length, or an axial load, exclusive of sheathing, of 200 lbf (890 N) (890 N)
per member.
1
This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.02 on Specifications and Test Methods for Accessories and Related Products.
Current edition approved Dec. 1, 2011March 15, 2015. Published January 2012April 2015. Originally approved in 1981. Last previous edition approved in 2011 as
C955C955 – 11c.–11b. DOI: 10.1520/C0955-11C.10.1520/C0955-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American Iron and Steel Institute (AISI), 1140 Connecticut Ave., NW, Suite 705, Washington, DC 20036, http://www.steel.org.
*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
1
---------------------- Page: 1 ----------------------
C955 − 15
4. Materials and Manufacture
4.1 Members shall be manufactured from steel meeting the requirements of Specification A1003/A1003M.
4.2 The minimum steel thickness (base steel) shall be not less than 0.0329 in. (0.84 mm).
4.3 Individual measurements before the application of protective coa
...
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