ASTM A970/A970M-07

Standard Specification for Headed Steel Bars for Concrete Reinforcement

ABSTRACT
This specification covers deformed and plain steel reinforcing bars in cut lengths with a head attached to one or both ends for reinforcing concrete structures. This standard applies only to headed bars with welded, threaded or forged heads. Material, manufacturing and testing requirements for the reinforcing bars shall be in accordance with other ASTM documents listed herein.
SCOPE
1.1 This specification covers deformed and plain steel reinforcing bars in cut lengths, with a head attached to one or both ends, for concrete reinforcement. Attachment can be accomplished through welding, by integrally hot forging of a head from the reinforcing bar end, by internal threads in the head mating to threads on the bar end, or by a separate threaded nut to secure the head to the bar. Heads are forge formed, machined from bar stock, or cut from plate.Note 1
This specification is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures. The requirements of this specification are not applicable to headed bars where the attachment of the head is accomplished by alternate means.
1.2 This specification is applicable for orders in either SI units as Specification A 970M or inch-pound units shown in the text in brackets [Specification A 970].
1.3 &combined-units;
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.

General Information

• Status: Historical
• Publication Date: 14-Oct-2007
• ICS: 77.140.15 - Steels for reinforcement of concrete
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.05 - Steel Reinforcement

Relations

• Replaces: ASTM A970/A970M-06 - Standard Specification for Headed Steel Bars for Concrete Reinforcement
• Effective Date: 15-Oct-2007
• Replaced By: ASTM A970/A970M-09 - Standard Specification for Headed Steel Bars for Concrete Reinforcement
• Effective Date: 15-Nov-2009

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A970/A970M – 07
Standard Specification for
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Headed Steel Bars for Concrete Reinforcement
This standard is issued under the fixed designationA970/A970M; 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* A572/A572M Specification for High-Strength Low-Alloy
Columbium-Vanadium Structural Steel
1.1 This specification covers deformed and plain steel
A615/A615M Specification for Deformed and Plain
reinforcing bars in cut lengths, with a head attached to one or
Carbon-Steel Bars for Concrete Reinforcement
both ends, for concrete reinforcement. Attachment can be
A700 PracticesforPackaging,Marking,andLoadingMeth-
accomplished through welding, by integrally hot forging of a
ods for Steel Products for Shipment
head from the reinforcing bar end, by internal threads in the
A706/A706M Specification for Low-Alloy Steel Deformed
headmatingtothreadsonthebarend,orbyaseparatethreaded
and Plain Bars for Concrete Reinforcement
nut to secure the head to the bar. Heads are forge formed,
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2.2 AWS Standards:
machined from bar stock, or cut from plate.
AWS C6.1 Recommended Practices for Friction Welding
NOTE 1—This specification is applicable for headed bars produced with
AWS D1.4/D1.4M Structural Welding Code - Reinforcing
welded, threaded, or forged heads and used for reinforcement of concrete
Steel
structures. The requirements of this specification are not applicable to
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2.3 U.S. Military Standard:
headedbarswheretheattachmentoftheheadisaccomplishedbyalternate
MIL-STD-129 Marking for Shipment and Storage
means.
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2.4 U.S. Federal Standard:
1.2 This specification is applicable for orders in either SI
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
units as SpecificationA970M or inch-pound units shown in the
text in brackets [Specification A970].
3. Terminology
1.3 The values stated in either SI units or inch-pound units
3.1 Definitions:
are to be regarded separately as standard. The values stated in
3.1.1 forged headed bar—steel bar used in the reinforce-
each system may not be exact equivalents; therefore, each
mentofconcretethathasthehead(s)integrallyforgedtooneor
system shall be used independently of the other. Combining
both ends.
values from the two systems may result in non-conformance
3.1.2 head—round, elliptical, or rectangular shape used to
with the standard.
anchor a steel bar in concrete.
1.4 This standard does not purport to address all of the
3.1.3 threaded headed bar—steel bar used in the reinforce-
safety concerns, if any, associated with its use. It is the
ment of concrete that has the head(s) attached to one or both
responsibility of the user of this standard to establish appro-
ends using tapered or straight threads internal to the head or by
priate safety and health practices and determine the applica-
a separate internally threaded nut securing the head to the
bility of regulatory limitations prior to use.
threaded bar end.
3.1.4 welded headed bar—steel bar used in the reinforce-
2. Referenced Documents
ment of concrete that has the head(s) welded to one or both
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2.1 ASTM Standards:
ends.
A36/A36M Specification for Carbon Structural Steel
A370 Test Methods and Definitions for Mechanical Testing
4. Ordering Information
of Steel Products
4.1 It shall be the responsibility of the purchaser to specify
all requirements that are necessary for material ordered to this
specification. Such requirements shall include but are not
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This specification is under the jurisdiction of ASTM A01 on Steel, Stainless
limited to the following:
Steel and Related Alloys and is the direct responsibility of A01.05 on Steel
4.1.1 Quantity,
Reinforcement.
Current edition approved Oct. 15, 2007. Published October 2007. Originally
approved in 1997. Last previous edition approved in 2006 as A970/A970M–06.
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DOI: 10.1520/A0970_A0970M-07. Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Miami, FL 33126, http://www.aws.org.
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contact ASTM customer service at [e-mail]. For Annual Book of ASTM AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Standards volume information, refer to the standard’s Document Summary page on Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. Or visit: http://
the ASTM website. assist.daps.dla.mil/online.
*ASummary of Changes section appears at the end of this standard.
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A970/A970M – 07
FIG. 1 Headed
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