ASTM A704/A704M-05

Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement

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 A 704) or in SI units [as A 704M].
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: 28-Feb-2005
• ICS: 77.140.15 - Steels for reinforcement of concrete
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.05 - Steel Reinforcement

Relations

• Replaces: ASTM A704/A704M-01 - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
• Effective Date: 01-Mar-2005
• Replaced By: ASTM A704/A704M-06 - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
• Effective Date: 01-Mar-2006

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A 704/A 704M – 05
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* 2.3 U.S. Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
1.1 This specification covers material in mat (or sheet) form
fabricated from hot-rolled, plain steel bars or rods to be used
3. Ordering Information
for the reinforcement of concrete. Mats consist of two layers of
3.1 It shall be the responsibility of the purchaser to specify
bars or rods which are assembled by welding at right angles to
all requirements that are necessary for material ordered to this
each other.
specification. Such requirements shall include, but are not
1.2 This specification is applicable for orders in either
limited to, the following:
inch-pound units (as A 704) or in SI units [as A 704M].
3.1.1 Quantity, no. of mats and/or area,
1.3 The values stated in either inch-pound units or SI units
3.1.2 Sizeandspacingofsteelbarsorrodsineachdirection,
are to be regarded as standard. Within the text, the SI units are
3.1.3 Plain bar or rod,
shown in brackets. The values stated in each system are not
3.1.4 Grade required (Grade 40 or 60 [280 or 420] as
exact equivalents; therefore, each system must be used inde-
appropriate),
pendentlyoftheother.Combiningvaluesfromthetwosystems
3.1.5 Type of steel, as appropriate (see Section 4), and
may result in nonconformance with this specification.
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
2.1 ASTM Standards:
mats; Grade 40; toASTMA 704 – ______. 6 by 12 in.; ⁄2 in. diameter by
1
120 in. longitudinal tip to tip, outer bars spaced 54 in.; ⁄2 in. diameter by
A 185 Specification for Steel Welded Wire Reinforcement,
60 in. transverse, outer bars spaced 108 in. [1000 welded bar mats; Grade
Plain, for Concrete
280; to ASTM A 704M – ______. 150 by 300 mm; 12 mm diameter by
A 615/A 615M Specification for Deformed and Plain
3000 mm longitudinal tip-to-tip, outer bars spaced 1350 mm; 12 mm
Carbon-Steel Bars for Concrete Reinforcement
diameter by 1500 mm transverse, outer bars spaced 2750 mm].
A 497/A 497M Specification for Steel Welded Wire Rein-
forcement, Deformed, for Concrete 4. Materials
A 700 Practices for Packaging, Marking, and Loading
4.1 Plain bars or rods of Grades 40 and 60 [280 and 420]
Methods for Steel Products for Domestic Shipment
used in the manufacture of mats shall conform to Specification
A 706/A 706M Specification for Low-Alloy Steel De-
A 615/A 615M or Specification A 706/A 706M.
formed and Plain Bars for Concrete Reinforcement
3
4.2 Maximumsizeofbarandrodmaterialshallbe ⁄4in.[19
2.2 U.S. Military Standards:
mm] nominal diameter. Minimum size of rod material shall be
MIL-STD 129 Marking for Shipment and Storage
7
⁄32 in. [6 mm] nominal diameter.
MIL-STD163 SteelMillProductsPreparationforShipment
and Storage 5. Fabrication
5.1 Fabricated mats shall be composed of two layers of
plain bars or rods substantially parallel and perpendicular to
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
each other.
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
5.2 Assembly—Mats shall be assembled by means of weld-
A01.05 on Steel Reinforcement.
ing to provide attachment at all intersections.
Current edition approved March 1, 2005. Published March 2005. Originally
approved in 1974. Last previous edition approved in 2001 as A 704/A 704M – 01.
5.2.1 Welded joints shall withstand normal shipping and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
handling without becoming broken, but the presence of broken
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
welds, regardless of cause, shall not constitute cause for
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. rejection unless the number of broken welds per sheet exceed
*A Summary of Changes section appears at the end of this standard.
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A 704/A 704M – 05
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