ASTM A184/A184M-01

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Designation: A 184/A 184M – 01
Standard Specification for
Welded Deformed Steel Bar Mats for Concrete
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Reinforcement
This standard is issued under the fixed designationA184/A184M; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3. Ordering Information
1.1 This specification covers material in mat (or sheet) form 3.1 The purchaser should specify:
fabricated from hot-rolled deformed steel bars to be used for 3.1.1 Quantity,
the reinforcement of concrete. The mats shall consist of two 3.1.2 Size and spacing of members in each direction,
layers of bars that are assembled at right angles to each other. 3.1.3 Grade required (Grade 40 or 60) [300 or 420],
Mats may be assembled by welding at the intersections. 3.1.4 Type of steel as appropriate (see Section 4),
1.2 This specification is applicable for orders in either 3.1.5 ASTM designation A 184/A 184M and year of issue.
inch-pound units (as Specification A 184) or SI units (as
NOTE 1—Atypical ordering description is as follows: 1000 bar mats to
Specification A 184M).
ASTM A 184– ; fabricated from Grade 40 bars to ASTM A 615– ; 6 by
1.3 The values stated in either inch-pound units or SI units
6 in.; No. 4 by 120 in. longitudinal tip to tip, outer bars spaced 54 in.; No.
are to be regarded as standard. Within the text, the SI units are 3 by 60 in. transverse, outer bars spaced 114 in.
[1000 bar mats toASTMA 184M– ; fabricated from Grade 300 bars to
shown in brackets. The values stated in each system are not
ASTM A 615M– ; 150 by 150 mm; No. 10 by 3000 mm longitudinal tip
exact equivalents; therefore, each system must be used inde-
to tip, outer bars spaced 1350 mm; No. 10 by 1500 mm transverse, outer
pendentlyoftheother.Combiningvaluesfromthetwosystems
bars spaced 2850 mm.]
may result in nonconformance with this specification.
4. Material and Manufacture
2. Referenced Documents
4.1 Deformed steel bars of Grades 40 [300] used in the
2.1 ASTM Standards:
manufacture of welded mats shall conform to Specification
A 615/A 615M Specification for Deformed and Plain
A 615 [A 615M]. Deformed steel bars of Grade 60 [420] used
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Billet-Steel Bars for Concrete Reinforcement
in the manufacture of welded mats shall conform to Specifi-
A 706/A 706M Specification for Low-Alloy Steel De-
cation A 615 [A 615M] or A 706 [A 706M].
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formed and Plain Bars for Concrete Reinforcement
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2.2 U.S. Military Standards:
5. Fabrication
MIL-STD-129 Marking for Shipment and Storage
5.1 Fabricated mats shall be composed of two layers of bars
MIL-STD-163 Steel Mill Products Preparation for Ship-
substantially parallel and perpendicular to each other.
ment and Storage
5.1.1 Mats shall be assembled by means of welding to
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2.3 U.S. Federal Standard:
provide attachment at intersections.
Fed Std No. 123 Marketing for Shipments (Civil Agencies)
5.1.1.1 Welds shall provide attachment at all exterior inter-
sections and at not less than alternate interior intersections.
5.1.1.2 The separation of 5 % or less of all welded intersec-
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
tions of any mat shall not be cause for rejection provided that
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
no more than half of the welds on any one bar are separated.
A01.05 on Steel Reinforcement.
Current edition approved March 10, 2001. Published March 2001. Originally
5.1.1.3 Welding shall be performed in such a manner that
published as A 184 – 36 T. Last previous edition A 184/A 184M – 96.
the strength and ductility requirements of the material specifi-
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Annual Book of ASTM Standards, Vol 01.04.
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cations in Section 4 are met when a specimen is tested across
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. a point of weld.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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A 184/A 184M – 01
NOTE 2—Welding of the mat intersections has generally been per-
9.3 In case a test specimen fails to meet the provisions of
formed without problems, but care should be taken when welding
5.1.1.3, all of the remaining bars on the transverse member
reinforcing bars without carbon equivalent levels above 0.55%, in order to
shall be tested and the average of all tests (including the
prevent cracking in the weld area.
original test) shall meet the requirements specified in 5.1.1.3.
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