1、Designation: A 704/A 704M 06Standard Specification forWelded Steel Plain Bar or Rod Mats for ConcreteReinforcement1This standard is issued under the fixed designation A 704/A 704M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, th
2、e 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.1. Scope*1.1 This specification covers material in mat (or sheet) formfabricated from hot-rolled, plain steel bars or r
3、ods to be usedfor the reinforcement of concrete. Mats consist of two layers ofbars or rods which are assembled by welding at right angles toeach other.1.2 This specification is applicable for orders in eitherinch-pound units (as A 704) or in SI units as A 704M.1.3 The values stated in either inch-po
4、und 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
5、this specification.2. Referenced Documents2.1 ASTM Standards:2A 185 Specification for Steel Welded Wire Reinforcement,Plain, for ConcreteA 615/A 615M Specification for Deformed and PlainCarbon-Steel Bars for Concrete ReinforcementA 497/A 497M Specification for Steel Welded Wire Rein-forcement, Defor
6、med, for ConcreteA 700 Practices for Packaging, Marking, and LoadingMethods for Steel Products for Domestic ShipmentA 706/A 706M Specification for Low-Alloy Steel De-formed and Plain Bars for Concrete Reinforcement2.2 U.S. Military Standard:MIL-STD 129 Marking for Shipment and Storage32.3 U.S. Feder
7、al Standard:Fed. Std. No. 123 Marking for Shipment (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 followin
8、g:3.1.1 Quantity, no. of mats and/or area,3.1.2 Size and spacing of steel bars or rods in each direction,3.1.3 Plain bar or rod,3.1.4 Grade required (Grade 40 or 60 280 or 420 asappropriate),3.1.5 Type of steel, as appropriate (see Section 4), and3.1.6 ASTM designation and year of issue.NOTE 1A typi
9、cal ordering description is as follows: 1000 welded barmats; Grade 40; to ASTM A 704 _. 6 by 12 in.;12 in. diameter by120 in. longitudinal tip to tip, outer bars spaced 54 in.;12 in. diameter by60 in. transverse, outer bars spaced 108 in. 1000 welded bar mats; Grade280; to ASTM A 704M _. 150 by 300
10、mm; 12 mm diameter by3000 mm longitudinal tip-to-tip, outer bars spaced 1350 mm; 12 mmdiameter by 1500 mm transverse, outer bars spaced 2750 mm.4. Materials4.1 Plain bars or rods of Grades 40 and 60 280 and 420used in the manufacture of mats shall conform to SpecificationA 615/A 615M or Specificatio
11、n A 706/A 706M.4.2 Maximum size of bar and rod material shall be34 in. 19mm nominal diameter. Minimum size of rod material shall be732 in. 6 mm nominal diameter.5. Fabrication5.1 Fabricated mats shall be composed of two layers ofplain bars or rods substantially parallel and perpendicular toeach othe
12、r.5.2 AssemblyMats shall be assembled by means of weld-ing to provide attachment at all intersections.5.2.1 Welded joints shall withstand normal shipping andhandling without becoming broken, but the presence of brokenwelds, regardless of cause, shall not constitute cause forrejection unless the numb
13、er of broken welds per sheet exceed1This 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 March 1, 2006. Published March 2006. Originallyap
14、proved in 1974. Last previous edition approved in 2005 as A 704/A 704M 05.2For 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
15、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.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor
16、 Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.1 % of the total, provided that not more than one half of thepermissible maximum number of broken welds are located onany one bar or rod.5.2.2 Welding shall be done in such a manner that theminimum tensile strength, yield strength,
17、 and elongation re-quirements for material as described in Section 4 shall be metwhen a specimen is tested across a point of weld. Weld shearstrength requirements shall be in compliance with Section 6.6. Mechanical Requirements Mechanical Requirements6.1 Strength of Connections in Welded Plain Bar o
18、r RodMatsIn order to assure adequate weld shear strength betweenlongitudinal and transverse bar or rod, weld shear strengthtests, as described in 6.3.2, shall be made. The minimumaverage shear value shall not be less than 25 000 lbf 172 Nmultiplied by the nominal area of the larger bar or rod inin.2
19、mm2.6.2 Number of Tests:6.2.1 One bar or rod of each size or grade to be used in thefabrication of the mat shall be tested for conformance with theprovisions of 4.1 or 4.2 for each 75 000 ft27000 m2 of matsor fraction thereof.6.2.2 One sample consisting of longitudinal bars or rodswith not less than
20、 two connections on the same transverse baror rod shall be taken and tested for conformance with theprovisions of 5.2.2 and 6.1 from each 75 000 ft27000 m2ofmats or fractions thereof.6.3 Test Methods:6.3.1 Tension test specimens for determining conformancewith 5.2.2 shall have a welded joint located
21、 approximately atthe center of the bar or rod being tested, and the cross bar orrod shall extend approximately 1 in. 25 mm beyond eachside. All unit stress determinations shall be based on thenominal area calculated using the nominal diameter specified.6.3.2 Weld shear tests for determining conforma
22、nce with therequirements of 6.1 shall be conducted with a fixture asdescribed in Section 11 of Specification A 185 or Section 8 ofSpecification A 497/A 497M.7. Size, Dimensions, and Tolerances7.1 Size and Spacing Dimensions:7.1.1 The sizes, spacings, dimensions, and arrangement ofthe bar or rod mats
23、 shall conform to the design specified by thepurchaser. Bars or rods shall extend beyond exterior intersec-tions a distance of not less than 1 in. 25 mm. The spacing ofbars or rods shall average that specified in the design, and thespace between individual bars or rods shall not vary more than14 in.
24、 6 mm from that specified.7.1.2 Where bars or rods of two sizes are used, the nominalarea of the smaller size shall not be less than 70 % of the areaof the larger size.7.2 Width and Length TolerancesThe overall length orwidth of the mats shall not be more than 1 in. 25 mm greateror less than the spe
25、cified dimension.8. Finish and Surface Condition8.1 The finished mats shall be free of injurious defects inmaterial or workmanship.8.2 Rust, seams, surface irregularities, or mill scale shall notbe cause for rejection provided the weight, dimensions, cross-sectional area, and tensile properties of a
26、 hand wire brushedtest specimen are not less than the requirements of thisspecification.9. Rejection and Retests9.1 Fabricated mats that do not meet the requirements ofthis specification shall be rejected and reported to the manu-facturer within 5 working days from the receipt of samples bythe purch
27、aser.9.2 When a test specimen fails to meet the provisions of5.2.3, two additional samples shall be selected and tested. Allretest specimens shall meet the requirements of this specifica-tion.9.3 When a test specimen fails to meet the provisions of 6.1,all of the remaining welds on the transverse me
28、mber shall betested and the average of all tests (including the original test)shall meet the requirements specified in 6.1.10. Inspection and Test Reports10.1 InspectionThe inspector representing the purchasershall have free entry, at all times while work on the contract ofthe purchaser is being per
29、formed, to all parts of the manufac-turers plant which concern the fabrication of the mats ordered.The manufacturer shall afford the inspector all reasonablefacilities to satisfy him that the mats are being furnished inaccordance with this specification. All tests and inspectionshall be made at the
30、place of fabrication prior to shipment,unless otherwise specified, and shall be so conducted as not tointerfere unnecessarily with fabricating operations. Inspectionas to general workmanship shall be visual.10.2 Test Reports on Bar MaterialThe manufacturer shallsupply test reports showing that the m
31、aterial used in thefabrication of the mats as delivered has fulfilled the tension andbend test requirements of the specified type and grade de-scribed in Section 4, which reports shall show the manufactur-ers test identification numbers, including the identity of thematerial.10.3 A material test rep
32、ort, certificate of inspection, orsimilar document printed from or used in electronic form froman electronic data interchange (EDI) transmission shall beregarded as having the same validity as a counterpart printed inthe certifiers facility. The content of the EDI transmitteddocument must meet the r
33、equirements of the invoked ASTMstandard(s) and conform to any existing EDI agreement be-tween the purchaser and the supplier. Notwithstanding theabsence of a signature, the organization submitting the EDItransmission is responsible for the content of the report.NOTE 2The industry definition as invok
34、ed here is: EDI is thecomputer-to-computer exchange of business information in a standardformat such as ANSI ASC X12.10.4 For Government Procurement OnlyExcept as other-wise specified in the contract, the contractor is responsible forthe performance of all inspection and test requirements speci-fied
35、 herein and may use his own or any other suitable facilitiesfor the performance of all inspection and test requirementsspecified herein, unless disapproved by the purchaser at theA 704/A 704M 062time of purchase. The purchaser shall have the right to performany of the inspections and tests at the sa
36、me frequency as setforth in this specification, where such inspections are deemednecessary to ensure that material conforms to prescribedrequirements.11. Rehearing11.1 Samples tested in accordance with this specificationthat represent rejected material shall be preserved for twoweeks from the date r
37、ejection is reported to the manufacturer.In case of dissatisfaction with the results of the tests, themanufacturer may make claim for a hearing within that time.12. Packaging and Package Marking12.1 Packaging, marking, and loading for shipment shall bein accordance with Practices A 700.12.2 When spe
38、cified in the contract or order, and for directprocurement by or direct shipment to the U.S. Government,marking for shipment, in addition to requirements specified inthe contract or order, shall be in accordance with MIL-STD-129 for military agencies and with Fed. Std. No. 123 for civilagencies.12.3
39、 Each bundle of mats shall be marked with a suitabletag showing the order number, name of the manufacturer, size,and grade of the material used.13. Keywords13.1 concrete reinforcement; mats; steel bars; steel rodsSUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this
40、 standard since the last issue(A 704/A 704M 05) that may impact the use of this standard. (Approved March 1, 2006.)(1) Revised section 2.2 and Section 12. (2) Removed Section 13 on Marking.Committee A01 has identified the location of selected changes to this standard since the last issue (A 704/A 70
41、4M 01) thatmay impact the use of this standard. (Approved March 1, 2005.)(1) Revised sections 1.1, 2.1, 3.1, 3.1.4, 4.1, 6.3.2, and Note 1. (2) Added section 10.3 and Note 2.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mention
42、edin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and
43、 must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of
44、 theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box
45、C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 704/A 704M 063
