ASTM C645-11
(Specification)Standard Specification for Nonstructural Steel Framing Members
Standard Specification for Nonstructural Steel Framing Members
ABSTRACT
This specification covers nonstructural steel framing members in interior construction assemblies. Members shall be manufactured from steel and shall have a protective coating. Studs and rigid furring channels shall have a configuration and steel thickness such that the system in which they are used will carry the design transverse loads without exceeding either the allowable stress of the steel or the allowable design deflection. Members shall be manufactured in such a fashion as to minimize burrs and sharp edges. Penetration test shall be done for performance requirements, where members shall be capable of pulling the head of the screw below the surface of the gypsum board without spin out. Apparatus and materials shall satisfy the testing requirements of the specification.
SCOPE
1.1 This specification covers nonstructural steel framing members in interior construction assemblies.
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 safety hazards caveat pertains only to the test methods portion, Sections 9 and 10, 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: C645 – 11
Standard Specification for
1
Nonstructural Steel Framing Members
This standard is issued under the fixed designation C645; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 2.2 AISI Standard:
S100 NorthAmerican Specification for the Design of Cold-
1.1 This specification covers nonstructural steel framing
3
Formed Steel Structural Members, 2007 edition
members in interior construction assemblies.
4
2.3 ICC-ES Document
1.2 The values stated in inch-pound units are to be regarded
ICC-ES-AC86 Acceptance Criteria for Steel Studs and
as standard. The values given in parentheses are mathematical
Gypsum-Board Interior Nonload-Bearing Walls—
conversions to SI units that are provided for information only
Complete Construction—AC86—Approved July 1995
and are not considered standard.
(Editorially revised September 2005) (Formerly ICBO
1.3 The following safety hazards caveat pertains only to the
AC86 dated July 1995)
test methods portion, Sections 9 and 10, of this specification:
This standard does not purport to address all of the safety
3. Terminology
concerns, if any, associated with its use. It is the responsibility
3.1 Definitions—Definitions shall be in accordance with
of the user of this standard to establish appropriate safety and
Terminology C11.
health practices and determine the applicability of regulatory
3.2 Definitions of Terms Specific to This Standard:
limitations prior to use.
3.2.1 members, n—in screw application of gypsum board,
2. Referenced Documents studs, runners (track), hat furring channels, main beams and
2
cross furring members of grid suspension systems or other
2.1 ASTM Standards:
items manufactured in accordance with this specification.
A653/A653M Specification for Steel Sheet, Zinc-Coated
3.2.2 nonstructural wall stud, n—a member in a steel
(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)
framed wall system which is limited to a lateral (transverse)
by the Hot-Dip Process
2
load of not more than 10 lb/ft (480 Pa), a superimposed
A1003/A1003M Specification for Steel Sheet, Carbon,
verticalload,exclusiveofsheathingmaterials,ofnotmorethan
Metallic- and Nonmetallic-Coated for Cold-Formed Fram-
100 lbf/ft (1460 N/m), or a superimposed vertical load of not
ing Members
more than 200 lbs (890 N).
C11 TerminologyRelatingtoGypsumandRelatedBuilding
Materials and Systems
4. Materials and Manufacture
C475/C475M Specification for Joint Compound and Joint
4.1 Members shall be manufactured from steel meeting the
Tape for Finishing Gypsum Board
requirements of Specification A1003/A1003M.
C1396/C1396M Specification for Gypsum Board
4.2 Members shall have a protective coating conforming to
C754 Specification for Installation of Steel Framing Mem-
Specification A653/A653M – G 40 minimum or shall have a
bers to Receive Screw-Attached Gypsum Panel Products
protective coating with an equivalent corrosion resistance.
C1002 Specification for Steel Self-PiercingTapping Screws
4.3 Members shall be manufactured from steel having a
for the Application of Gypsum Panel Products or Metal
minimum thickness, individual measurement of 0.0179 in.
Plaster Bases to Wood Studs or Steel Studs
(0.455 mm) before application of protective coating.
1
5. Dimensions and Permissible Variations
This specification is under the jurisdiction of ASTM Committee C11 on
Gypsum and Related Building Materials and Systems and is the direct responsibility
5.1 Studs and rigid furring channels shall have a configu-
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and
ration and steel thickness such that the system in which they
Related Products.
Current edition approved May 1, 2011. Published June 2011. Originally
approved in 1970. Last previous edition approved in 2009 as C645 – 09a. DOI:
10.1520/C0645-11.
2 3
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.
4
Standards volume information, refer to the standard’s Document Summary page on Available from ICC Evaluation Services, Inc., 5360 Workman Mill Road,
the ASTM website. Whittier, CA 90601, www.icc-es.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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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:C645–09a Designation: C645 – 11
Standard Specification for
1
Nonstructural Steel Framing Members
This standard is issued under the fixed designation C645; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
1.1 This specification covers nonstructural steel framing members in interior construction assemblies.
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 safety hazards caveat pertains only to the test methods portion, Sections 9 and 10, 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
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
C475/C475M Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
C1396/C1396M Specification for Gypsum Board
C754 Specification for Installation of Steel Framing Members to Receive Screw-Attached Gypsum Panel Products
C1002 Specification for Steel Self-Piercing Tapping Screws for the Application of Gypsum Panel Products or Metal Plaster
Bases to Wood Studs or Steel Studs
2.2 AISI Standard:
S100 NorthAmerican Specification for the Design of Cold-Formed Steel Structural Members, 2007 editionAISI COSPCode of
33
Standard Practice for Cold-Formed Steel Structural Framing Committee on Framing Standards, 2005 Edition
4
2.3 ICC-ES Document
ICC-ES-AC86 Acceptance Criteria for Steel Studs and Gypsum-Board Interior Nonload-Bearing Walls—Complete
Construction—AC86—Approved July 1995 (Editorially revised September 2005) (Formerly ICBO AC86 dated July 1995)
3. Terminology
3.1 Definitions—Definitions shall be in accordance with Terminology C11.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 members, n—in screw application of gypsum board, studs, runners (track), hat furring channels, main beams and cross
furring members of grid suspension systems or other items manufactured in accordance with this specification.
3.2.2 nonstructural wall stud, n—a member in a steel framed wall system which is limited to a lateral (transverse) load of not
2
more than 10 lb/ft (480 Pa), a superimposed vertical load, exclusive of sheathing materials, of not more than 100 lbf/ft (1460
N/m), or a superimposed vertical load of not more than 200 lbs (890 N).
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 Nov. 15, 2009.May 1, 2011. Published December 2009.June 2011. Originally approved in 1970. Last previous edition approved in 2009 as
C645 – 09a. DOI: 10.1520/C0645-09A.10.1520/C0645-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
4
Available from ICC Evaluation Services, Inc., 5360 Workman Mill Road, Whittier, CA 90601, www.icc-es.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
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C645 – 11
4. Materials and Manufacture
4.1 Members shall be manufactured from steel meeting the requirements of Specification A1003/A1003M.
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