ASTM A184/A184M-06(2011)
(Specification)Standard Specification for Welded Deformed Steel Bar Mats for Concrete Reinforcement
Standard Specification for Welded Deformed Steel Bar Mats for Concrete Reinforcement
ABSTRACT
This specification covers the standard guide for welded deformed steel bar mats for concrete reinforcement. Mats should be capable of withstanding static load exerted perpendicular to the plane of the mat tending to separate the bars with no apparent loosening when applied to one intersection of the connected bars. Tension tests shall be performed on the specimen to determine the conformance to reference test materials. Also, test of connections against separation shall be performed on an assembled mat by placing blocks under a deformed bar in the upper layer and applying the prescribed load upon the bar in the lower layer.
SCOPE
1.1 This specification covers material in mat (or sheet) form fabricated from deformed steel bars to be used for the reinforcement of concrete. Mats consist of two layers of bars that are assembled at right angles to each other. Mats are assembled by welding at the intersections.
1.2 This specification is applicable for orders in either inch-pound units (as Specification A184) or SI units (as Specification A184M).
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.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:A184/A184M −06 (Reapproved 2011)
Standard Specification for
Welded Deformed Steel Bar Mats for Concrete
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 (´) 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 It shall be the responsibility of the purchaser to specify
fabricated from deformed steel bars to be used for the all requirements that are necessary for material ordered to this
reinforcement of concrete. Mats consist of two layers of bars specification. Such requirements shall include, but are not
that are assembled at right angles to each other. Mats are limited to, the following:
assembled by welding at the intersections. 3.1.1 Quantity,
3.1.2 Size and spacing of members in each direction,
1.2 This specification is applicable for orders in either
3.1.3 Grade required (Grade 40 or 60) [280 or 420],
inch-pound units (as Specification A184) or SI units (as
3.1.4 Type of steel as appropriate (see Section 4),
Specification A184M).
3.1.5 ASTM designation A184/A184M and year of issue.
1.3 The values stated in either inch-pound units or SI units
NOTE 1—Atypical ordering description is as follows: 1000 bar mats to
are to be regarded as standard. Within the text, the SI units are
ASTM A184– ; fabricated from Grade 40 bars toASTM A615– ; 6 by 6
shown in brackets. The values stated in each system are not
in.; No. 4 by 120 in. longitudinal tip to tip, outer bars spaced 54 in.; No.
exact equivalents; therefore, each system must be used inde-
3 by 60 in. transverse, outer bars spaced 114 in.
pendentlyoftheother.Combiningvaluesfromthetwosystems
[1000 bar mats toASTM A184M– ; fabricated from Grade 280 bars to
ASTM A615M– ; 150 by 150 mm; No. 10 by 3000 mm longitudinal tip
may result in nonconformance with this specification.
to tip, outer bars spaced 1350 mm; No. 10 by 1500 mm transverse, outer
bars spaced 2850 mm.]
2. Referenced Documents
4. Material and Manufacture
2.1 ASTM Standards:
A615/A615M Specification for Deformed and Plain Carbon-
4.1 Deformed steel bars of Grades 40 [280] used in the
Steel Bars for Concrete Reinforcement
manufacture of welded mats shall conform to Specification
A700 Practices for Packaging, Marking, and Loading Meth-
A615 [A615M]. Deformed steel bars of Grade 60 [420] used in
ods for Steel Products for Shipment
the manufacture of welded mats shall conform to Specification
A706/A706M Specification for Low-Alloy Steel Deformed
A615 [A615M] or A706 [A706M].
and Plain Bars for Concrete Reinforcement
5. Fabrication
2.2 U.S. Military Standard:
MIL-STD-129 Marking for Shipment and Storage
5.1 Fabricated mats shall be composed of two layers of bars
substantially parallel and perpendicular to each other.
2.3 U.S. Federal Standard:
5.1.1 Mats shall be assembled by means of welding to
Fed Std No. 123 Marketing for Shipments (CivilAgencies)
provide attachment at intersections.
5.1.1.1 Welds shall provide attachment at all exterior inter-
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
sections and at not less than alternate interior intersections.
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
5.1.1.2 The separation of 5 % or less of all welded intersec-
A01.05 on Steel Reinforcement.
tions of any mat shall not be cause for rejection provided that
Current edition approved Nov. 1, 2011. Published November 2011. Originally
´1
approved in 1936. Last previous edition approved in 2006 as A184/A184M – 06 . no more than half of the welds on any one bar are separated.
DOI: 10.1520/A0184_A0184M-06R11.
5.1.1.3 Welding shall be performed in such a manner that
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the strength and ductility requirements of the material specifi-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
cations in Section 4 are met when a specimen is tested across
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
a point of weld.
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. Or visit: http:// NOTE 2—Welding of the mat intersections has generally been per-
assist.daps.dla.mil/online. formed without problems, but care should be taken when welding
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A184/A184M−06 (2011)
reinforcing bars with 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.
6. Mechanical Properties
10. Inspection and Test Reports
6.1 Mats shall be capable of withstanding a static load of
10.1 Inspection—The inspector representing the purchaser
150 lbf [670 N] exerted perpendicular to the plane of the mat
shall have free entry, at all times while work on the contract of
tending to separate the bars with no apparent loosening when
the purchaser is being performed, to all parts of the manufac-
applied to one intersection of the connected bars.
turer’s plant that concern the fabrication of the mats ordered.
The manufacturer shall afford the inspector all reasonable
6.2 Number of Tests:
facilities to satisfy the inspector that the mats are being
6.2.1 One sample consisting of not less than two connec-
furnished in accordance with this specification. All tests and
tions on the same transverse member shall be tested for
inspection shall be made at the place of fabrication prior to
conformance with the provisions of 5.1.1.3 and 6.1 from each
2 2
shipment,unlessotherwisespecified,andshallbesoconducted
75 000 ft [7000 m ] of mats or fraction thereof.
as not to interfere unnecessarily with fabricating operations.
6.3 Test Methods:
Inspec
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