ASTM C645-11a
(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 −11a
StandardSpecification 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* for the Application of Gypsum Panel Products or Metal
Plaster Bases to Wood Studs or Steel Studs
1.1 This specification covers nonstructural steel framing
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members in interior construction assemblies. 2.2 AISI Standards:
S100 North American Specification for the Design of Cold-
1.2 The values stated in inch-pound units are to be regarded
Formed Steel Structural Members, 2007 edition
as standard. The values given in parentheses are mathematical
S200 North American Standard for Cold-Formed Steel
conversions to SI units that are provided for information only
Framing – General Provisions, 2007 Edition
and are not considered standard.
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2.3 ICC-ES Document
1.3 The following safety hazards caveat pertains only to the
ICC-ES-AC86 Acceptance Criteria for Steel Studs and
test methods portion, Sections 9 and 10, of this specification:
Gypsum-Board Interior Nonload-Bearing Walls—
This standard does not purport to address all of the safety
Complete Construction—AC86—Approved July 1995
concerns, if any, associated with its use. It is the responsibility
(Editorially revised September 2005) (Formerly ICBO
of the user of this standard to establish appropriate safety and
AC86 dated July 1995)
health practices and determine the applicability of regulatory
limitations prior to use.
3. Terminology
2. Referenced Documents
3.1 Definitions—Definitions shall be in accordance with
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Terminology C11.
2.1 ASTM Standards:
3.2 Definitions of Terms Specific to This Standard:
A653/A653M Specification for Steel Sheet, Zinc-Coated
(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) 3.2.1 members, n—in screw application of gypsum board,
studs, runners (track), hat furring channels, main beams and
by the Hot-Dip Process
A1003/A1003M Specification for Steel Sheet, Carbon, cross furring members of grid suspension systems or other
items manufactured in accordance with this specification.
Metallic- and Nonmetallic-Coated for Cold-Formed
Framing Members
3.2.2 nonstructural wall stud, n—a member in a steel
C11 Terminology Relating to Gypsum and Related Building
framed wall system which is limited to a lateral (transverse)
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Materials and Systems
load of not more than 10 lb/ft (480 Pa), a superimposed
C475/C475M Specification for Joint Compound and Joint
verticalload,exclusiveofsheathingmaterials,ofnotmorethan
Tape for Finishing Gypsum Board
100 lbf/ft (1460 N/m), or a superimposed vertical load of not
C1396/C1396M Specification for Gypsum Board
more than 200 lbs (890 N).
C754 Specification for Installation of Steel Framing Mem-
bers to Receive Screw-Attached Gypsum Panel Products
4. Materials and Manufacture
C1002 Specification for Steel Self-Piercing Tapping Screws
4.1 Members shall be manufactured from steel meeting the
requirements of Specification A1003/A1003M.
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This specification is under the jurisdiction of ASTM Committee C11 on
4.2 Members shall have a protective coating conforming to
Gypsum and Related Building Materials and Systems and is the direct responsibility
Specification A653/A653M – G 40 minimum or shall have a
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and
protective coating with an equivalent corrosion resistance.
Related Products.
Current edition approved Oct. 1, 2011. Published October 2011. Originally
approved in 1970. Last previous edition approved in 2011 as C645 – 11. DOI:
10.1520/C0645-11A.
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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C645−11a
4.3 Members shall be manufactured from steel having a 5.1.2 Minimum width of face to which gypsum board is
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minimum thickness, individual measurement of 0.0179 in. screw-attached shall be not less th
...
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:C645–11 Designation: C645 – 11a
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
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2.2 AISI Standard: AISI Standards:
S100 North American Specification for the Design of Cold-Formed Steel Structural Members, 2007 edition
S200 North American Standard for Cold-Formed Steel Framing – General Provisions, 2007 Edition
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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
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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).
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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 MayOct. 1, 2011. Published JuneOctober 2011. Originally approved in 1970. Last previous edition approved in 20092011 as
C645–09a.C645 – 11. DOI: 10.1520/C0645-11A.
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 – 11a
4. Materials and Manufacture
4.1 Members shall be manufactured from steel meeting the requirements of Specification A1003/A1003M.
4.2 Members shall have a prote
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