ASTM A970/A970M-18
(Specification)Standard Specification for Headed Steel Bars for Concrete Reinforcement
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 steel reinforcing bars in cut lengths, with a head attached to one or both ends, for concrete reinforcement. Heads are forge-formed, machined from bar stock, or cut from plate. Attachment can be accomplished through:
1.1.1 Welding;
1.1.2 Integrally hot forging of a head from the reinforcing bar end;
1.1.3 Internal threads in the head mating to threads on the bar end;
1.1.4 Cold-swaging an externally threaded coupling sleeve onto the reinforcing bar;
1.1.5 Cold-extruding an external coupling sleeve onto the reinforcing bar;
1.1.6 Cold-swaging an external coupling sleeve or headed sleeve onto the reinforcing bar;
1.1.7 Attaching a coupling sleeve to the end of the reinforcing bar by means of the means of a ferrous-filler medium; or
1.1.8 Separate threaded nut to secure the head to the bar.
Note 1: The requirements of this specification are only applicable to headed bars where the attachment of the head is accomplished by one of the methods listed in 1.1.
1.2 Limitations on head dimensions and on obstructions and interruptions of bar deformations on the non-planar features on the bearing face of the head are presented in Annex A1. The requirements in Annex A1 only apply when specified by the purchaser (see 4.2.3).
1.3 This specification is applicable for orders in either inch-pound units as Specification A970 or SI units as Specification A970M.
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the specification.
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:A970/A970M −18
Standard Specification for
1
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* shall be used independently of the other. Combining values
from the two systems may result in non-conformance with the
1.1 This specification covers deformed steel reinforcing
specification.
barsincutlengths,withaheadattachedtooneorbothends,for
concrete reinforcement. Heads are forge-formed, machined
1.5 This standard does not purport to address all of the
from bar stock, or cut from plate. Attachment can be accom-
safety concerns, if any, associated with its use. It is the
plished through:
responsibility of the user of this standard to establish appro-
1.1.1 Welding;
priate safety, health, and environmental practices and deter-
1.1.2 Integrally hot forging of a head from the reinforcing mine the applicability of regulatory limitations prior to use.
bar end;
1.6 This international standard was developed in accor-
1.1.3 Internal threads in the head mating to threads on the
dance with internationally recognized principles on standard-
bar end;
ization established in the Decision on Principles for the
1.1.4 Cold-swaging an externally threaded coupling sleeve
Development of International Standards, Guides and Recom-
onto the reinforcing bar;
mendations issued by the World Trade Organization Technical
1.1.5 Cold-extruding an external coupling sleeve onto the
Barriers to Trade (TBT) Committee.
reinforcing bar;
1.1.6 Cold-swaging an external coupling sleeve or headed 2. Referenced Documents
sleeve onto the reinforcing bar;
2
2.1 ASTM Standards:
1.1.7 Attaching a coupling sleeve to the end of the reinforc-
A370 Test Methods and Definitions for Mechanical Testing
ing bar by means of the means of a ferrous-filler medium; or
of Steel Products
1.1.8 Separate threaded nut to secure the head to the bar.
A615/A615M SpecificationforDeformedandPlainCarbon-
Steel Bars for Concrete Reinforcement
NOTE 1—The requirements of this specification are only applicable to
headed bars where the attachment of the head is accomplished by one of
A700 Guide for Packaging, Marking, and Loading Methods
the methods listed in 1.1.
for Steel Products for Shipment
1.2 Limitations on head dimensions and on obstructions and A706/A706M Specification for Deformed and Plain Low-
interruptions of bar deformations on the non-planar features on
Alloy Steel Bars for Concrete Reinforcement
the bearing face of the head are presented in Annex A1. The
3
2.2 AWS Standards:
requirements in Annex A1 only apply when specified by the
AWS C6.1 Recommended Practices for Friction Welding
purchaser (see 4.2.3).
AWS D1.4⁄D1.4M Structural Welding Code - Reinforcing
1.3 This specification is applicable for orders in either
Steel
inch-pound units as Specification A970 or SI units as Specifi-
4
2.3 U.S. Military Standard:
cation A970M.
MIL-STD-129 Marking for Shipment and Storage
1.4 The values stated in either inch-pound units or SI units
4
2.4 U.S. Federal Standard:
are to be regarded separately as standard. Within the text, the
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
SI units are shown in brackets. The values stated in each
system may not be exact equivalents; therefore, each system
2
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
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Standards volume information, refer to the standard’s Document Summary page on
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee the ASTM website.
3
A01.05 on Steel Reinforcement. Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
Current edition approved Sept. 1, 2018. Published September 2018. Originally Miami, FL 33126, http://www.aws.org.
4
approved in 1997. Last previous edition approved in 2017 as A970/A970M – 17. Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
DOI: 10.1520/A0970_A0970M-18. Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
*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
---------------------- Page: 1 ----------------------
A970/A970M−18
5
2.5 ACI
...
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: A970/A970M − 17 A970/A970M − 18
Standard Specification for
1
Headed Steel Bars for Concrete Reinforcement
This standard is issued under the fixed designation A970/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*
1.1 This specification covers deformed steel reinforcing bars in cut lengths, with a head attached to one or both ends, for
concrete reinforcement. Heads are forge-formed, machined from bar stock, or cut from plate. Attachment can be accomplished
through:
1.1.1 Welding;
1.1.2 Integrally hot forging of a head from the reinforcing bar end;
1.1.3 Internal threads in the head mating to threads on the bar end;
1.1.4 Cold-swaging an externally threaded coupling sleeve onto the reinforcing bar;
1.1.5 Cold-extruding an external coupling sleeve onto the reinforcing bar;
1.1.6 Cold-swaging an external coupling sleeve or headed sleeve onto the reinforcing bar;
1.1.7 Attaching a coupling sleeve to the end of the reinforcing bar by means of the means of a ferrous-filler medium; or
1.1.8 Separate threaded nut to secure the head to the bar.
NOTE 1—The requirements of this specification are only applicable to headed bars where the attachment of the head is accomplished by one of the
methods listed in 1.1.
1.2 Limitations on head dimensions and on obstructions and interruptions of bar deformations on the non-planar features on the
bearing face of the head are presented in Annex A1. The requirements in Annex A1 only apply when specified by the purchaser
(see 4.2.3).
1.3 This specification is applicable for orders in either inch-pound units as Specification A970 or SI units as Specification
A970M.
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems may result in non-conformance with the specification.
1.5 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement
A700 Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
A706/A706M Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.05
on Steel Reinforcement.
Current edition approved Nov. 15, 2017Sept. 1, 2018. Published November 2017September 2018. Originally approved in 1997. Last previous edition approved in
20162017 as A970/A970M – 16.A970/A970M – 17. DOI: 10.1520/A0970_A0970M-17.10.1520/A0970_A0970M-18.
2
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 the ASTM website.
*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
---------------------- Page: 1 ----------------------
A970/A970M − 18
3
2.2 AWS Standards:
AWS C6.1 Recommended Practices for Friction Welding
AWS D1.4 ⁄D1.4M Structural Welding Code - Reinforcing Steel
4
2.3 U.S. Military Standard:
MIL-STD-129 Marking for Shipment and Storage
4
2.4 U.S. Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
5
2.5 ACI Standard:
ACI 318 Bu
...
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