ASTM C645-07
(Specification)Standard Specification for Nonstructural Steel Framing Members
Standard Specification for Nonstructural Steel Framing Members
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 the standard. The SI (metric) values given in parentheses are provided for information purposes only.
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: C 645 – 07
Standard Specification for
1
Nonstructural Steel Framing Members
This standard is issued under the fixed designation C 645; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* SpecificationfortheDesignofCold-FormedSteelStructural
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Members
1.1 This specification covers nonstructural steel framing
members in interior construction assemblies.
3. Terminology
1.2 The values stated in inch-pound units are to be regarded
3.1 Definitions—Definitions shall be in accordance with
as the standard.The SI (metric) values given in parentheses are
TerminologyC11.
provided for information purposes only.
3.2 Definitions of Terms Specific to This Standard:
1.3 The following safety hazards caveat pertains only to the
3.2.1 members, n—in screw application of gypsum board,
test methods portion, Sections 9 and 10, of this specification:
studs, runners (track), hat furring channels, main beams and
This standard does not purport to address all of the safety
cross furring members of grid suspension systems or other
concerns, if any, associated with its use. It is the responsibility
items manufactured in accordance with this specification.
of the user of this standard to establish appropriate safety and
3.2.2 nonstructural wall stud, n—a member in a steel
health practices and determine the applicability of regulatory
framed wall system which is limited to a lateral (transverse)
limitations prior to use.
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load of not more than 10 lb/ft (480 Pa), a superimposed
2. Referenced Documents verticalload,exclusiveofsheathingmaterials,ofnotmorethan
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100 lbf/ft (1460 N/m), or a superimposed vertical load of not
2.1 ASTM Standards:
more than 200 lbs (890 N).
A 653/A 653M Specification for Steel Sheet, Zinc-Coated
(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)
4. Materials and Manufacture
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 Members shall have a protective coating conforming to
ing Members
Specification A 653/A 653M – G 40 minimum or shall have a
C11 Terminology Relating to Gypsum and Related Build-
protective coating with an equivalent corrosion resistance.
ing Materials and Systems
3 4.3 Members shall be manufactured from steel having a
C 36/C 36M Specification for Gypsum Wallboard
minimum thickness, individual measurement of 0.0179 in.
C 754 Specification for Installation of Steel Framing Mem-
(0.455 mm) before application of protective coating.
bers to Receive Screw-Attached Gypsum Panel Products
C 1002 Specification for Steel Self-Piercing Tapping
5. Dimensions and Permissible Variations
Screws for the Application of Gypsum Panel Products or
5.1 Studs and rigid furring channels shall have a configu-
Metal Plaster Bases to Wood Studs or Steel Studs
ration and steel thickness such that the system in which they
2.2 AISI Standard:
are used will carry the design transverse loads without exceed-
ing either the allowable stress of the steel or the allowable
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design deflection. Main beams and cross furring of grid
This specification is under the jurisdiction of ASTM Committee C11 on
Gypsum and Related Building Materials and Systems and is the direct responsibility
suspension systems shall be limited to a deflection of L/240.
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and
The manufacturer shall supply sufficient data for calculating
Related Products.
design performance.
Current edition approved Jan. 1, 2007. Published January 2007. Originally
approved in 1970. Last previous edition approved in 2006 as C 645 – 06.
NOTE 1—Allowable deflection varies depending on the cladding used
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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
4
the ASTM website. Available from the American Iron and Steel Institute, 1000 16th St. N.W.,
3
Withdrawn. Washington, DC 20036.
*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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the lat
...
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:C645–07a Designation: C 645 – 07b
Standard Specification for
1
Nonstructural Steel Framing Members
This standard is issued under the fixed designation C 645; 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.
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 the standard. The SI (metric) values given in parentheses are
provided for information purposes only.
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:
A 653/A 653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the
Hot-Dip Process
A 1003/A 1003M SpecificationforSteelSheet,Carbon,Metallic-andNonmetallic-CoatedforCold-FormedFramingMembers
C 11 Terminology Relating to Gypsum and Related Building Materials and Systems
C 1396/C 1396M Specification for Gypsum Board
C 754 Specification for Installation of Steel Framing Members to Receive Screw-Attached Gypsum Panel Products
C 1002 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:
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Specification for the Design of Cold-Formed Steel Structural Members
3
AISI Code of Standard Practice for Cold-Formed Steel Structural Framing Committee on Framing Standards —2005 Edition
3. Terminology
3.1 Definitions—Definitions shall be in accordance with Terminology C 11.
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).
4. Materials and Manufacture
4.1 Members shall be manufactured from steel meeting the requirements of Specification A 1003/A 1003M.
4.2 Members shall have a protective coating conforming to Specification A 653/A 653M–G40 minimum or shall have a
protective coating with an equivalent corrosion resistance.
4.3 Members shall be manufactured from steel having a minimum thickness, individual measurement of 0.0179 in. (0.455 mm)
before application of protective coating.
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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.
CurrenteditionapprovedAug.1,Dec.15,2007.PublishedAugust2007.January2008.Originallyapprovedin1970.Lastpreviouseditionapprovedin2007asC 645 – 07a.
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.
*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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C 645 – 07b
5. Dimensions and Permissible Variations
5.1 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 allowab
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