ASTM_A_184_-_A_184M_-_06_2011.pdf

Designation:A184/A184M06(Reapproved 2011)Standard Specification forWelded Deformed Steel Bar Mats for ConcreteReinforcement1This standard is issued under the fixed designation A184/A184M;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()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.Scope1.1 This specification covers material in mat(or sheet)formfabricated from deformed steel bars to be used for thereinforcement 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 A184)or SI units(asSpecification A184M).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 Documents2.1 ASTM Standards:2A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete ReinforcementA700 Practices for Packaging,Marking,and Loading Meth-ods for Steel Products for ShipmentA706/A706M Specification for Low-Alloy Steel Deformedand Plain Bars for Concrete Reinforcement2.2 U.S.Military Standard:MIL-STD-129 Marking for Shipment and Storage32.3 U.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 Section 4),3.1.5 ASTM designation A184/A184M and year of issue.NOTE1A typical ordering description is as follows:1000 bar mats toASTM A184;fabricated from Grade 40 bars to ASTM A615;6 by 6in.;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 A184M;fabricated from Grade 280 bars toASTM A615M;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 40 280 used in themanufacture of welded mats shall conform to SpecificationA615 A615M.Deformed steel bars of Grade 60 420 used inthe manufacture of welded mats shall conform to SpecificationA615 A615M or A706 A706M.5.Fabrication5.1 Fabricated mats shall be composed of two layers of barssubstantially parallel and perpendicular to each other.5.1.1 Mats shall be assembled by means of welding toprovide attachment at intersections.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-tions of any mat shall not be cause for rejection provided thatno more than half of the welds on any one bar are separated.5.1.1.3 Welding shall be performed in such a manner thatthe strength and ductility requirements of the material specifi-cations in Section 4 are met when a specimen is tested acrossa point of weld.NOTE2Welding of the mat intersections has generally been per-formed without problems,but care should be taken when welding1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.05 on Steel Reinforcement.Current edition approved Nov.1,2011.Published November 2011.Originallyapproved in 1936.Last previous edition approved in 2006 as A184/A184M 061.DOI:10.1520/A0184_A0184M-06R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.Or visit:http:/assist.daps.dla.mil/online.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);reinforcing bars with carbon equivalent levels above 0.55%,in order toprevent cracking in the weld area.6.Mechanical Properties6.1 Mats shall be capable of withstanding a static load of150 lbf 670 N exerted perpendicular to the plane of the mattending to separate the bars with no