ASTM A970/A970M-09
(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 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 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 4.1.13).
1.3 This specification is applicable for orders in either SI units as Specification A970M or inch-pound units shown in the text in brackets [Specification A970].
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Relations
Buy Standard
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 – 09
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* 2. Referenced Documents
2
1.1 This specification covers deformed and plain steel 2.1 ASTM Standards:
reinforcing bars in cut lengths, with a head attached to one or A370 Test Methods and Definitions for Mechanical Testing
both ends, for concrete reinforcement. Attachment can be of Steel Products
accomplished through welding, by integrally hot forging of a A615/A615M Specification for Deformed and Plain
head from the reinforcing bar end, by internal threads in the Carbon-Steel Bars for Concrete Reinforcement
headmatingtothreadsonthebarend,orbyaseparatethreaded A700 PracticesforPackaging,Marking,andLoadingMeth-
nut to secure the head to the bar. Heads are forge formed, ods for Steel Products for Shipment
machined from bar stock, or cut from plate. A706/A706M Specification for Low-Alloy Steel Deformed
and Plain Bars for Concrete Reinforcement
NOTE 1—This specification is applicable for headed bars produced with
3
2.2 AWS Standards:
welded, threaded, or forged heads and used for reinforcement of concrete
AWS C6.1 Recommended Practices for Friction Welding
structures. The requirements of this specification are not applicable to
headedbarswheretheattachmentoftheheadisaccomplishedbyalternate AWS D1.4/D1.4M Structural Welding Code - Reinforcing
means.
Steel
4
2.3 U.S. Military Standard:
1.2 Limitations on head dimensions and on obstructions and
MIL-STD-129 Marking for Shipment and Storage
interruptions of bar deformations on the non-planar features on
4
2.4 U.S. Federal Standard:
the bearing face of the head are presented in Annex A1. The
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
requirements in Annex A1 only apply when specified by the
5
2.5 ACI Standard:
purchaser (see 4.1.13).
ACI 318 Building Code Requirements for Structural Con-
1.3 This specification is applicable for orders in either SI
crete
units as SpecificationA970M or inch-pound units shown in the
text in brackets [Specification A970].
3. Terminology
1.4 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.
1.5 This standard does not purport to address all of the
3.1.3 net bearing area—gross cross-sectional area of the
safety concerns, if any, associated with its use. It is the
head minus the nominal cross-sectional area of the deformed
responsibility of the user of this standard to establish appro-
reinforcing bar.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
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.
3
Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
1
This specification is under the jurisdiction of ASTM A01 on Steel, Stainless Miami, FL 33126, http://www.aws.org.
4
Steel and Related Alloys and is the direct responsibility of A01.05 on Steel AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Reinforcement. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. Or visit: http://
Current edition approved Nov. 15, 2009. Published December 2009. Originally assist.daps.dla.mil/online.
5
approved in 1997. Last previous edition approved in 2007 as A970/A970M – 07. Available fromAmerican Concrete Institute (ACI), P.O. Box 9094, Farmington
DOI: 10.1520/A0970_A0970M-09. Hills, MI 48333-9094, http://www.concrete.org.
*ASummary 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 – 09
FIG. 1 Headed Reinforcing Bar
3.1.4 threaded headed bar—steel bar used in the reinforce- 5.3 The head dimensions shall be provided by the purchaser
ment of concrete that has the head(s) a
...
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–07 Designation: A970/A970M – 09
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*
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.
1.2This specification is applicable for orders in either SI units as Specification A970M or inch-pound units shown in the text
in brackets [Specification A970].
1.3The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 standard.
1.4
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 4.1.13).
1.3 This specification is applicable for orders in either SI units as Specification A970M or inch-pound units shown in the text
in brackets [Specification A970].
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 standard.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
A36/A36MSpecification for Carbon Structural Steel
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A572/A572MSpecification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement
A700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment
A706/A706M Specification for Low-Alloy Steel Deformed and Plain Bars for Concrete Reinforcement
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:
1
This specification is under the jurisdiction ofASTMA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility ofA01.05 on Steel Reinforcement.
Current edition approved Oct.Nov. 15, 2007.2009. Published October 2007.December 2009. Originally approved in 1997. Last previous edition approved in 20062007 as
A970/A970M – 067. DOI: 10.1520/A0970_A0970M-079.
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 Welding Society (AWS), 550 NW LeJeune Rd., Miami, FL 33126, http://www.aws.org.
4
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. Or visit: http://
assist.daps.dla.mil/online.
*ASummary 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
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.