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ASTM A704/A704M-06(2011)

(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 consist of two layers of bars or rods which are assembled by welding 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 as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.

General Information

Status
Historical
Publication Date
31-Oct-2011
ICS
77.140.15 - Steels for reinforcement of concrete
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.05 - Steel Reinforcement
Current Stage
Ref Project

Relations

Replaces
ASTM A704/A704M-06 - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
Effective Date
01-Nov-2011
Replaced By
ASTM A704/A704M-17 - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
Effective Date
01-Sep-2017

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ASTM A704/A704M-06(2011) - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete ReinforcementASTM A704/A704M-06(2011) - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
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ASTM A704/A704M-06(2011) - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
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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:A704/A704M −06 (Reapproved 2011)
Standard Specification for
Welded Steel Plain Bar or Rod Mats for Concrete
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 2.2 U.S. Military Standard:
MIL-STD-29 Marking for Shipment and Storage
1.1 This specification covers material in mat (or sheet) form
2.3 U.S. Federal Standard:
fabricated from hot-rolled, plain steel bars or rods to be used
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
for the reinforcement of concrete. Mats consist of two layers of
bars or rods which are assembled by welding at right angles to
3. Ordering Information
each other.
3.1 It shall be the responsibility of the purchaser to specify
1.2 This specification is applicable for orders in either
all requirements that are necessary for material ordered to this
inch-pound units (as A704) or in SI units [as A704M].
specification. Such requirements shall include, but are not
limited to, the following:
1.3 The values stated in either inch-pound units or SI units
3.1.1 Quantity, no. of mats or area, or both;
are to be regarded as standard. Within the text, the SI units are
3.1.2 Sizeandspacingofsteelbarsorrodsineachdirection;
shown in brackets. The values stated in each system are not
3.1.3 Plain bar or rod;
exact equivalents; therefore, each system must be used inde-
3.1.4 Grade required (Grade 40 or 60 [280 or 420] as
pendentlyoftheother.Combiningvaluesfromthetwosystems
appropriate);
may result in nonconformance with this specification.
3.1.5 Type of steel, as appropriate (see Section 4); and
3.1.6 ASTM designation and year of issue.
2. Referenced Documents
NOTE 1—Atypical ordering description is as follows: 1000 welded bar
2.1 ASTM Standards:
mats; Grade 40; toASTM A704 – ______. 6 by 12 in.; ⁄2 in. diameter by
A185/A185M Specification for Steel Welded Wire
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
Reinforcement, Plain, for Concrete (Withdrawn 2013)
280; to ASTM A704M – ______. 150 by 300 mm; 12 mm diameter by
A615/A615M Specification for Deformed and Plain Carbon-
3000 mm longitudinal tip-to-tip, outer bars spaced 1350 mm; 12 mm
Steel Bars for Concrete Reinforcement
diameter by 1500 mm transverse, outer bars spaced 2750 mm].
A497/A497M Specification for Steel Welded Wire
Reinforcement, Deformed, for Concrete (Withdrawn
4. Materials
2013)
4.1 Plain bars or rods of Grades 40 and 60 [280 and 420]
A700 Practices for Packaging, Marking, and Loading Meth-
used in the manufacture of mats shall conform to Specification
ods for Steel Products for Shipment
A615/A615M or Specification A706/A706M.
A706/A706M Specification for Low-Alloy Steel Deformed
4.2 Maximumsizeofbarandrodmaterialshallbe ⁄4in.[19
and Plain Bars for Concrete Reinforcement
mm] nominal diameter. Minimum size of rod material shall be
⁄32 in. [6 mm] nominal diameter.
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
5. Fabrication
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.05 on Steel Reinforcement.
5.1 Fabricated mats shall be composed of two layers of
Current edition approved Nov. 1, 2011. Published November 2011. Originally
plain bars or rods substantially parallel and perpendicular to
approved in 1974. Last previous edition approved in 2006 as A704/A704M – 06.
each other.
DOI: 10.1520/A0704_A0704M-06R11.
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. Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
The last approved version of this historical standard is referenced on Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. Or visit: http://
www.astm.org. assist.daps.dla.mil/online.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A704/A704M−06 (2011)
5.2 Assembly—Mats shall be assembled by means of weld- 7.2 Width and Length Tolerances—The overall length or
ing to provide attachment at all intersections. width of the mats shall not be more than 1 in. [25 mm] greater
or less than the specified dimension.
5.2.1 Welded joints shall withstand normal shipping and
handling without becoming broken, but the presence of broken
8. Finish and Surface Condition
welds, regardless of cause, shall not constitute cause for
rejection unless the number of broken welds per sheet exceed
8.1 The finished mats shall be free of injurious defects in
1 % of the total, provided that not more than one half of the
material or workmanship.
permissible maximum number of broken welds are located on
8.2 Rust,seams,surfaceirregularities,ormillscaleshallnot
any one bar or rod.
be cause for rejection provided the weight, dimensions, cross-
5.2.2 Welding shall be done in such a manner that the
sectional area, and tensile properties of a hand wire brushed
minimum tensile strength, yield strength, and elongation re-
test specimen are not less than the requirements of this
quirements for material as described in Section 4 shall be met
specification.
when a specimen is tested across a point of weld. Weld shear
strength requirements shall be in compliance with Section 6.
9. Rejection and Retests
9.1 Fabricated mats that do not meet the requirements of
6. Mechanical Requirements
this specification shall be rejected and reported to the manu-
6.1 Strength of Connections in Welded Plain Bar or Rod
facturer within 5 working days from the receipt of samples by
Mats—In order to assure adequate weld shear strength between
the purchaser.
longitudinal and transverse bar or rod, weld shear strength
9.2 When a test specimen fails to meet the provisions of
tests, as described in 6.3.2, shall be made. The minimum
average shear value shall not be less than 25 000 lbf [172 N] 5.2.2, two additional samples shall be selected and tested. All
retest specimens shall meet the requirements of this specifica-
multiplied by the nominal area of the larger bar or rod in in.
[mm ]. tion.
9.3 Whenatestspecimenfailstomeettheprovisionsof6.1,
6.2 Number of Tests
...

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1.6 This specification is applicable for orders in either inch-pound units (as Specification A775) or SI units [as Specification A775M].  
1.7 The values stated in either inch-pound units or SI 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.  
1.8 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.  
1.9 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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ASTM
ASTM A934/A934M-22(Specification)
Standard Specification for Epoxy-Coated Prefabricated Steel Reinforcing Bars

ABSTRACT
This specification covers deformed and plain steel reinforcing bars. Steel samples shall be blast cleaned and shall be coated with a protective fusion-bonded epoxy coating by electrostatic spray or other suitable method. The steel specimens shall undergo deformation test, holiday checks, bending tests, and cathodic disbondment test. The steels materials shall conform to the required values of coating thickness, continuity, flexibility, adhesion.
SCOPE
1.1 This specification covers deformed and plain steel reinforcing bars which prior to surface preparation are prefabricated and then coated with a protective fusion-bonded epoxy coating by electrostatic spray or other suitable method.  
1.2 Prefabricated steel reinforcing bars coated with fusion-bonded epoxy powder coating in accordance with this specification are intended to be fabricated before being coated.  
1.3 Organic coatings other than epoxy may be used provided they meet the requirements of this specification.  
1.4 Requirements for epoxy coatings are contained in Annex A1.  
1.5 Requirements for patching material are contained in Annex A2 in Specification A775/A775M.  
1.6 Guidelines for application process and product test procedures of epoxy coatings for steel reinforcing bars are presented in Appendix X1.  
1.7 Guidelines for construction practices at the job-site for coated steel reinforcing bars are presented in Appendix X2.  
1.8 This specification is applicable for orders in either inch-pound units (as Specification A934) or SI [metric] units [as Specification A934M].  
1.9 The values stated in either inch-pound units or SI 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.  
1.10 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.  
1.11 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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  • Technical specification
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