ASTM C645-07

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Designation:C645–07a Designation: C 645 – 07b
Standard Specification for
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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
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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
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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.
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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.
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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.
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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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