AASHTO M 54M-M 54-07(2012)-ASTM A184-A184M-06

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Standard Specification for

Welded Deformed Steel Bar Mats

for Concrete Reinforcement

AASHTO Designation: M 54M/M 54-07 (2012)

ASTM Designation: A184/A184M-06

∈

American Association of State Highway and Transportation Officials

444 North Capitol Street N.W., Suite 249

Washington, D.C. 20001

TS-4g M 54M/M 54-1 AASHTO

Standard Specification for

Welded Deformed Steel Bar Mats

for Concrete Reinforcement

AASHTO Designation: M 54M/M 54-07 (2012)

ASTM Designation: A184/A184M-06

∈

1. 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 shall be assembled by welding at the intersections.

1.2. This specification is applicable to orders in either SI units (M 54M) or inch-pound units (M 54).

1.3. The values stated in either inch-pound units or SI units are to be regarded as standard. Within the

text, the inch-pound 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.

2. REFERENCED DOCUMENTS

2.1. AASHTO Standard:

 M 31M/M 31, Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

2.2. ASTM Standards:

 A700-05, Standard Practices for Packaging, Marking, and Loading Methods for Steel

Products for Shipment (withdrawn 2014)

 A706/A706M, Standard Specification for Deformed and Plain Low-Alloy Steel Bars for

Concrete Reinforcement

2.3. Military Standard:

 MIL-STD-129, Marking for Shipment and Storage

2.4. Federal Standard:

 Fed. Std. No. 123, Marking for Shipments (Civil Agencies)

3. ORDERING INFORMATION

3.1. It shall be the responsibility of the purchaser to specify all requirements that are necessary for

material ordered. Such requirements shall include, but are not limited to, the following:

3.1.1. Quantity;

TS-4g M 54M/M 54-2 AASHTO

3.1.2. Size and spacing of members in each direction;

3.1.3. Grade required 280, 420 [40, 60];

3.1.4. Type of steel as appropriate (Section 4); and

3.1.5. AASHTO M 54M/M 54 and year of issue.

Note 1—A typical ordering description is as follows: 1000 bar mats to M 54M-_____; fabricated

from Grade 280 bars to M 31M-_____; 150 by 150 mm; No. 10 by 3000 mm longitudinal tip to

tip, outer bars spaced 1350 mm; No. 10 by 1500 mm transverse, outer bars spaced 2850 mm.

[1000 bar mats to M 54-_____; Grade 40; 6 by 6 in.; No. 4 by 120 in. longitudinal tip to tip, outer

bars spaced 54 in.; No. 3 by 60 in.; transverse, outer bars spaced 114 in.].

4. MATERIAL AND MANUFACTURE

4.1. Deformed steel bars of Grades 280 [40] used in the manufacture of welded mats shall conform to

M 31M [M 31]. Deformed steel bars of Grade 420 [60] used in the manufacture of welded mats

shall conform to M 31M [M 31] or ASTM A706M [A706].

5. FABRICATION

5.1. Fabricated mats shall be composed of two layers of bars substantially parallel and perpendicular to

each other.

5.1.1. Mats shall be assembled by means of welding to provide attachment at intersections.

5.1.1.1. Welds shall provide attachment at all exterior intersections and at not less than alternate

interior intersections.

5.1.1.2. The separation of 5 percent or less of all welded intersections of any mat shall not be cause for

rejection provided that no more than half of the welds on any one bar are separated.

5.1.1.3. Welding shall be performed in such a manner that the strength and ductility requirements of the

material specification in Section 4 are met when a specimen is tested across a point of weld.

Note 2—Welding of the mat intersections has generally been performed without problems, but

care should be taken when welding reinforcing bars with carbon equivalent levels above

0.55 percent, in order to prevent cracking in the weld area.

6. MECHANICAL PROPERTIES

6.1. Mats shall be capable of withstanding a static load of 670 N [150 lbf] exerted perpendicular to the

plane of the mat tending to separate the bars, with no apparent loosening when applied to one

intersection of connected bars.

6.2. Number of Tests:

6.2.1. One sample consisting of not fewer than two connections on the same transverse member shall be

tested for conformance with the provisions of Sections 5.1.1.3 and 6.1 from each 7000 m2

[75,000 ft2] of mats or fraction thereof.

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摘要：

The document titled AASHTO M 54M-M 54-07(2012)-ASTM A184-A184M-06 specifies the standard specification for steel bar mats used in concrete reinforcement. This standard was originally developed by ASTM International as A184/A184M-06 and later adopted

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AASHTO M 54M-M 54-07(2012)-ASTM A184-A184M-06

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