Designation: A 184/A 184M – 06Standard Specification forWelded Deformed Steel Bar Mats for ConcreteReinforcement1This standard is issued under the fixed designation A 184/A 184M; the number immediately following the designation indicates the yearof 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*1.1 This specification covers material in mat (or sheet) formfabricatedfromdeformedsteelbarstobeusedforthereinforcement of concrete. Mats consist of two layers of barsthat are assembled at right angles to each other. Mats areassembled by welding at the intersections.1.2 This specification is applicable for orders in eitherinch-pound units (as Specification A 184) or SI units (asSpecification A 184M).1.3 The values stated in either inch-pound units or SI unitsare to be regarded as standard. Within the text, the SI units areshown in brackets. The values stated in each system are notexact equivalents; therefore, each system must be used inde-pendently of the other. Combining values from the two systemsmay result in nonconformance with this specification.2. Referenced Documents2.1ASTM Standards:2A 615/A 615MSpecificationforDeformedandPlainCarbon-Steel Bars for Concrete ReinforcementA 700PracticesforPackaging,Marking,andLoadingMethods for Steel Products for ShipmentA 706/A 706MSpecificationforLow-AlloySteelDe-formed and Plain Bars for Concrete Reinforcement2.2U.S. Military Standard:MIL-STD-129Marking for Shipment and Storage32.3U.S. Federal Standard:Fed Std No. 123 Marketing for Shipments (Civil Agencies)33. Ordering Information3.1 It shall be the responsibility of the purchaser to specifyall requirements that are necessary for material ordered to thisspecification. Such requirements shall include, but are notlimited to, the following:3.1.1 Quantity,3.1.2 Size and spacing of members in each direction,3.1.3 Grade required (Grade 40 or 60) [280 or 420],3.1.4 Type of steel as appropriate (see Section4),3.1.5 ASTM designation A 184/A 184M and year of issue.NOTE1—A typical ordering description is as follows: 1000 bar mats toASTM A 184– ; fabricated from Grade 40 bars to ASTM A 615– ; 6 by6 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.[1000 bar mats to ASTM A 184M– ; fabricated from Grade 280 bars toASTM A 615M– ; 150 by 150 mm; No. 10 by 3000 mm longitudinal tipto tip, outer bars spaced 1350 mm; No. 10 by 1500 mm transverse, outerbars spaced 2850 mm.]4. Material and Manufacture4.1 Deformed steel bars of Grades 40  used in themanufacture of welded mats shall conform to SpecificationA 615 [A 615M]. Deformed steel bars of Grade 60  usedin the manufacture of welded mats shall conform to Specifi-cation A 615 [A 615M] or A 706 [A 706M].