ASTM A704/A704M-19e1
(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.
General Information
Relations
Standards Content (Sample)
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 −19
Standard Specification for
Welded Steel Plain Bar or Rod Mats for Concrete
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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.
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ε NOTE—An editorial correction was made to Footnote 1 in December 2019.
1. Scope* A615/A615M SpecificationforDeformedandPlainCarbon-
Steel Bars for Concrete Reinforcement
1.1 This specification covers material in mat (or sheet) form
A706/A706M Specification for Deformed and Plain Low-
fabricated from hot-rolled, plain steel bars or rods to be used
Alloy Steel Bars for Concrete Reinforcement
for the reinforcement of concrete. Mats are made from two
A1064/A1064M Specification for Carbon-Steel Wire and
layers of bars or rods that are assembled by welding the
Welded Wire Reinforcement, Plain and Deformed, for
intersections at right angles to each other.
Concrete
1.2 This specification is applicable for orders in either 3
2.2 AWS Standard:
inch-pound units (as A704) or in SI units [as A704M].
AWS D1.4/D1.4M Structural Welding Code – Steel Rein-
1.3 The values stated in either inch-pound units or SI units
forcing Bars
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are to be regarded separately as standard. Within the text, the
2.3 U.S. Military Standard:
SI units are shown in brackets. The values stated in each
MIL-STD-129 Marking for Shipment and Storage
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system may not be exact equivalents; therefore, each system
2.4 U.S. Federal Standard:
shall be used independently of the other. Combining values
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
from the two systems may result in non-conformance with this
specification.
3. Ordering Information
1.4 This specification does not purport to address all of the
3.1 Orders for welded steel plain bar or rod mats for
safety concerns, if any, associated with its use. It is the
concrete reinforcement under this specification shall contain
responsibility of the user of this specification to establish
the following information:
appropriate safety, health, and environmental practices and
3.1.1 Quantity of mats,
determine the applicability of regulatory limitations prior to
3.1.2 Nominal diameter (size), length, and spacing of steel
use.
bars or rods in each direction,
1.5 This international standard was developed in accor-
3.1.3 Plain bar or rod,
dance with internationally recognized principles on standard-
3.1.4 Grade required (Grade 40 or 60 [280 or 420] as
ization established in the Decision on Principles for the
appropriate),
Development of International Standards, Guides and Recom-
3.1.5 Type of steel (see 4.1); and
mendations issued by the World Trade Organization Technical
3.1.6 ASTM designation and year of issue.
Barriers to Trade (TBT) Committee.
NOTE 1—Atypical ordering description is as follows: 1000 welded bar
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mats; Grade 40; toASTMA704 – ______. 6 by 12 in.; ⁄2 in. diameter by
2. Referenced Documents
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120 in. longitudinal tip to tip, outer bars spaced 54 in.; ⁄2 in. diameter by
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2.1 ASTM Standards: 60 in. transverse, outer bars spaced 108 in. [1000 welded bar mats; Grade
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
diameter by 1500 mm transverse, outer bars spaced 2750 mm].
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
3.2 Thepurchasershallhavetheoptiontospecifyadditional
A01.05 on Steel Reinforcement.
requirements, including but not limited to, the following:
Current edition approved Sept. 1, 2019. Published September 2019. Originally
approved in 1974. Last previous edition approved in 2018 as A704/A704M – 18.
DOI: 10.1520/A0704_A0704M-19E01.
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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.
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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
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