ASTM A704/A704M-18
(Specification)Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
ABSTRACT
This specification covers materials in mat (or sheet) form fabricated from hot-rolled, plain steel bars or rods to be used for the reinforcement of concrete. Mats consist of two layers of bars or rods that are assembled by welding at right angles to each other. Welding shall be done in such a way that the minimum tensile strength, yield strength, and elongation requirements shall be met. Tension and shear tests shall be performed to meet the required strength and elongation properties and maximum size of a bar or rod material. A retest shall be performed when a specimen fails to meet the specified requirements. All tests and inspections shall be made at the place of fabrication prior to shipment, unless otherwise specified, and shall be so conducted as not to interfere unnecessarily with fabricating operations.
SCOPE
1.1 This specification covers material in mat (or sheet) form fabricated from hot-rolled, plain steel bars or rods to be used for the reinforcement of concrete. Mats are made from two layers of bars or rods that are assembled by welding the intersections at right angles to each other.
1.2 This specification is applicable for orders in either inch-pound units (as A704) or in SI units [as A704M].
1.3 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 this specification.
1.4 This specification 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 specification to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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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Designation:A704/A704M −18
Standard Specification for
Welded Steel Plain Bar or Rod Mats for Concrete
1
Reinforcement
This standard is issued under the fixed designationA704/A704M; 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* A706/A706M Specification for Deformed and Plain Low-
Alloy Steel Bars for Concrete Reinforcement
1.1 This specification covers material in mat (or sheet) form
A1064/A1064M Specification for Carbon-Steel Wire and
fabricated from hot-rolled, plain steel bars or rods to be used
Welded Wire Reinforcement, Plain and Deformed, for
for the reinforcement of concrete. Mats are made from two
Concrete
layers of bars or rods that are assembled by welding the
3
2.2 AWS Standard:
intersections at right angles to each other.
AWS D1.4/D1.4M Structural Welding Code – Steel Rein-
1.2 This specification is applicable for orders in either
forcing Bars
inch-pound units (as A704) or in SI units [as A704M].
4
2.3 U.S. Military Standard:
1.3 The values stated in either inch-pound units or SI units
MIL-STD-129 Marking for Shipment and Storage
4
are to be regarded separately as standard. Within the text, the
2.4 U.S. Federal Standard:
SI units are shown in brackets. The values stated in each
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
system may not be exact equivalents; therefore, each system
3. Ordering Information
shall be used independently of the other. Combining values
from the two systems may result in non-conformance with this
3.1 Orders for welded steel plain bar or rod mats for
specification.
concrete reinforcement under this specification shall contain
1.4 This specification does not purport to address all of the
the following information:
safety concerns, if any, associated with its use. It is the 3.1.1 Quantity of mats,
responsibility of the user of this specification to establish
3.1.2 Nominal diameter (size), length, and spacing of steel
appropriate safety, health, and environmental practices and bars or rods in each direction,
determine the applicability of regulatory limitations prior to 3.1.3 Plain bar or rod,
use.
3.1.4 Grade required (Grade 40 or 60 [280 or 420] as
1.5 This international standard was developed in accor- appropriate),
dance with internationally recognized principles on standard-
3.1.5 Type of steel (see Section 4.1); and
ization established in the Decision on Principles for the 3.1.6 ASTM designation and year of issue.
Development of International Standards, Guides and Recom-
NOTE 1—Atypical ordering description is as follows: 1000 welded bar
mendations issued by the World Trade Organization Technical
1
mats; Grade 40; toASTM A704 – ______. 6 by 12 in.; ⁄2 in. diameter by
Barriers to Trade (TBT) Committee. 1
120 in. longitudinal tip to tip, outer bars spaced 54 in.; ⁄2 in. diameter by
60 in. transverse, outer bars spaced 108 in. [1000 welded bar mats; Grade
2. Referenced Documents
280; to ASTM A704M – ______. 150 by 300 mm; 12 mm diameter by
3000 mm longitudinal tip-to-tip, outer bars spaced 1350 mm; 12 mm
2
2.1 ASTM Standards:
diameter by 1500 mm transverse, outer bars spaced 2750 mm].
A615/A615M SpecificationforDeformedandPlainCarbon-
3.2 Thepurchasershallhavetheoptiontospecifyadditional
Steel Bars for Concrete Reinforcement
requirements, including but not limited to, the following:
3.2.1 Requirements for inspection (10.1),
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
3.2.2 Packaging and special package marking requirements
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
(Section 12), and
A01.05 on Steel Reinforcement.
3.2.3 Other special requirements, if any.
Current edition approved Nov. 1, 2018. Published November 2018. Originally
approved in 1974. Last previous edition approved in 2017 as A704/A704M – 17.
DOI: 10.1520/A0704_A0704M-18.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from American Welding Society (AWS), 8669 NW 36 St., #130,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Miami, FL 33166-6672, http://www.aws.org.
4
Standards volume information, refer to the standard’s Document Summary page on Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
the ASTM website. 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 ----------------------
A704/A704M−18
4. Materials 7
...
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: A704/A704M − 17 A704/A704M − 18
Standard Specification for
Welded Steel Plain Bar or Rod Mats for Concrete
1
Reinforcement
This standard is issued under the fixed designation A704/A704M; 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 material in mat (or sheet) form fabricated from hot-rolled, plain steel bars or rods to be used for
the reinforcement of concrete. Mats consist of are made from two layers of bars or rods whichthat are assembled by welding the
intersections at right angles to each other.
1.2 This specification is applicable for orders in either inch-pound units (as A704) or in SI units [as A704M].
1.3 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 aremay not be exact equivalents; therefore, each system mustshall be used
independently of the other. Combining values from the two systems may result in nonconformancenon-conformance with this
specification.
1.4 This specification 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 specification to establish appropriate safety, health, and environmental practices and determine the applicability
of regulatory limitations prior to use.
1.5 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:
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
A1064/A1064M Specification for Carbon-Steel Wire and Welded Wire Reinforcement, Plain and Deformed, for Concrete
3
2.2 AWS Standard:
AWS D1.4/D1.4M Structural Welding Code – Steel Reinforcing Bars
4
2.3 U.S. Military Standard:
MIL-STD-29MIL-STD-129 Marking for Shipment and Storage
4
2.4 U.S. Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
3. Ordering Information
3.1 Orders for welded steel plain bar or rod mats for concrete reinforcement under this specification shall contain the following
information:
3.1.1 Quantity of mats,
3.1.2 Bar designation number Nominal diameter (size), length, and spacing of steel bars or rods in each direction,
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 Sept. 1, 2017Nov. 1, 2018. Published September 2017November 2018. Originally approved in 1974. Last previous edition approved in 20112017
as A704/A704M – 06 (2011).A704/A704M – 17. DOI: 10.1520/A0704_A0704M-17.10.1520/A0704_A0704M-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.
3
Available from American Welding Society (AWS), 8669 NW 36 St., #130, Miami, FL 33166-6672, http://www.aws.org.
4
Available from DLA Document Services, Building 4/D, 700 Robbins Ave., 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 ----------------------
A704/A704M − 18
3.1.3 Plain bar or rod,
3.1.4 Grade required (Grade 40 or 60 [280 or 420] as appropriate),
3.1.5 Type of steel (see Section 4.1); and
3.1.6 ASTM designation and year of issue.
1
NOTE 1—A typical ordering description is as follows: 1000 welded bar mats; Grade 40; to ASTM A704 – ______. 6 by 12 in.; ⁄2 in. diameter by 120
1
in. longitudinal tip to tip, outer bars spaced 54 in.; ⁄2 in. diameter by 60 in. transvers
...
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