1、Designation: A951/A951M 161Standard Specification forSteel Wire for Masonry Joint Reinforcement1This standard is issued under the fixed designation A951/A951M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revisi
2、on. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEEditorial corrections were made to Section 2 and 6.1.2 in June 2018.1. Scope*1.1 This specification covers masonry joint reinforcementfa
3、bricated from cold-drawn steel wire. Joint reinforcementconsists of longitudinal wires welded to cross wires.1.2 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem may
4、not be exact equivalents; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with thestandard.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization es
5、tablished in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A153/A153M Specification for Zinc Coating (Hot-Dip) onIron a
6、nd Steel HardwareA580/A580M Specification for Stainless Steel WireA641/A641M Specification for ZincCoated (Galvanized)Carbon Steel WireA1064/A1064M Specification for Carbon-Steel Wire andWelded Wire Reinforcement, Plain and Deformed, forConcrete3. Ordering Information3.1 Orders for wire reinforcemen
7、t under this Specificationshall contain the following information:3.1.1 Quantity (linear feet metres),3.1.2 Type (truss, ladder),3.1.3 Width (nominal thickness of masonry wall),3.1.4 Wire size and wire specification,3.1.5 Finish (see Section 6),3.1.6 Requirements for inspection (see Section 9),3.1.7
8、 Packaging (see Section 12), and3.1.8 ASTM designation number and year of issue.4. Materials and Manufacture4.1 Wire used in the manufacture of masonry joint rein-forcement shall be round and shaped and conform to theapplicable provisions of Specifications A580/A580M, Type304, or A1064/A1064M except
9、 as modified herein.4.2 Masonry joint reinforcement shall be assembled byautomatic machines or by other suitable mechanical means thatwill assure accurate spacing and alignment of all members ofthe finished product.4.3 Longitudinal and cross wires shall be securely con-nected at every intersection b
10、y an electric-resistance weldingprocess that includes both fusion welding together with appliedpressure to join the materials.4.4 Longitudinal wires shall be deformed. One set of twodeformations shall occur around the perimeter of the wire at amaximum spacing of 0.7 times the diameter or width of th
11、ewire, but not less than eight sets per 1 in. 25 mm of length.NOTE 1Wire used for joint reinforcement is knurled to form defor-mations and as such it does not come under the deformation requirementsin Specification A1064/A1064M.5. Mechanical Requirements5.1 Tensile PropertiesWire used in the fabrica
12、tion ofmasonry joint reinforcement shall conform to the requirementsof Table 1 based on nominal area of the wire.5.2 Tension Tests:5.2.1 Tension tests shall be made on individual wires cutfrom the finished product and tested either across or betweenthe welds. No less than 50 % shall be across welds.
13、5.2.2 Tension tests across a weld shall have the welded jointlocated approximately at the center of the wire being tested.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloysand is the direct responsibility of SubcommitteeA01.05 on Steel Rei
14、nforcement.Current edition approved Jan. 15, 2016. Published January 2016. Originallyapproved in 1996. Last previous edition approved in 2014 as A951/A951M 14.DOI: 10.1520/A0951_A0951M-16E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serv
15、iceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. Unite
16、d StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers
17、to Trade (TBT) Committee.15.2.3 Tensile strength shall be the average of four test valuesdetermined by dividing the maximum test load by the specifiednominal cross-sectional area of the wire.5.3 Reduction of AreaThe ruptured section of the tensilespecimen is measured to determine this property. The
18、measure-ment shall be made only when rupture has occurred at asufficient distance from the center of the weld to permit anaccurate measurement of the fractured section. Additionaltesting is permitted when a suitable ruptured section is notobtained from the initial test. The wire shall meet the minim
19、umreduction of area requirements of Table 1.5.4 Weld Shear StrengthThe weld shear strength inpounds-force shall not be less than 25 000 multiplied by thespecified nominal area of the larger wire in square inches inNewtons shall not be less than 172 multiplied by the nominalarea in square millimeters
20、.NOTE 2Since industry practice is to use butt welds in the manufactureof joint reinforcement, the weld shear strength in pounds-force isprescribed as 25 000 times the area of the larger wire rather than 35 000times the area of the larger wire.5.5 Weld Shear Strength Tests:5.5.1 Test specimens shall
21、be obtained from the finishedproduct by cutting a section of longitudinal wire that includesone weld.5.5.2 Weld shear strength tests shall be conducted using afixture of such design as to prevent rotation of the cross wire.The cross wire shall be placed in the anvil of the testing devicewhich is sec
22、ured in the tensile machine and the load thenapplied to the longitudinal wire.5.5.3 Weld shear strength shall be the average test load inpounds Newtons of four test specimens selected at random.5.6 Bend Tests:5.6.1 Test specimens shall be obtained from the fabricatedproduct by cutting a section of l
23、ongitudinal wire without welds.5.6.2 The test specimens shall be bent at room temperaturethrough 180 around a pin, the diameter of which is equal tothe nominal diameter of the specified wire. Shaped wires shallbe placed on the pin so that the minimum dimension isperpendicular to the axis of the pin.
24、5.6.3 The specimen shall not break nor shall there be visiblecracks of the base metal on the outside diameter of the bend.6. Other Requirements6.1 When corrosion protection of joint reinforcement isprovided, it shall be in accordance with one of the following:6.1.1 Mill GalvanizedZinc coated, in acc
25、ordance with thehot-dip method of Specification A641/A641M, with a mini-mum of 0.1 oz per ft230 g/m2 of surface area. It shall bepermissible to apply the coating before fabrication.6.1.2 Hot-Dip GalvanizedZinc coated, by the hot-dipmethod, in accordance with Specification A153/A153M, ClassB (average
26、 zinc coating of 1.50 oz per ft2458 g/m2). Thecoating shall be applied after fabrication.7. Dimensions and Tolerances7.1 Longitudinal WiresThe minimum size of longitudinalwires shall be W1.1 MW7.7.2 Cross WiresThe minimum size of cross wires shall beW1.1 MW7. Cross wires shall not project beyond the
27、 outsidelongitudinal wires by more than18 in. 3 mm.7.3 WidthThe width of joint reinforcement is defined asthe out-to-out distance of outside longitudinal wires. Widthshall not vary by more than18 in. 3 mm from the manufac-turers specified standard dimension. Width shall be measuredas follows:7.3.1 L
28、adder Type Joint ReinforcementAt opposite weldpoints, and7.3.2 Truss Type Joint ReinforcementFrom a weld pointon one longitudinal wire perpendicular to a point on theopposite wire between adjacent weld points.7.4 LengthThe length of pieces of joint reinforcementshall not vary by more than12 in. 3 mm
29、 from the specifiedlength.7.5 Dimensions:7.5.1 The required dimensions shall be measured on threesamples of joint reinforcement prior to galvanizing or on threesamples from which the galvanizing has been removed.7.5.2 Measure the dimensions of both longitudinal and crosswires to the nearest 0.001 in
30、. 0.030 mm.7.5.3 Measure the gaps between the ends of deformationsaround the circumference of the wire to the nearest 0.001 in.0.030 mm.8. Number of Tests8.1 Number of TestsOne set of each test described hereinshall be performed for each 300 000 linear feet 91 500 metresof joint reinforcement, but n
31、ot less than one set each week.9. Inspection9.1 Inspection of the wire reinforcement shall be agreedupon between the purchaser and the manufacturer as part of thepurchase order or contract.9.2 Except for yield strength, all tests and inspections shallbe made at the place of manufacture prior to ship
32、ment, unlessotherwise specified. Such tests shall be conducted so as not tointerfere unnecessarily with the operation of the facilities.9.3 If the purchaser considers it desirable to determinecompliance with the strength requirements of SpecificationA1064/A1064M, tension tests shall be made by a rec
33、ognizedlaboratory, or by the wire supplier, observed by the purchasersrepresentative if desired, provided such tests do not interfereunnecessarily with manufacturing operations.10. Rejection and Rehearing10.1 Material that does not meet the requirements of thisspecification, shall be subject to reje
34、ction. Unless otherwisespecified, any rejection shall be reported to the manufacturerwithin five days from the time of selection of test specimens.TABLE 1 Tension Test RequirementsTensile strength, min, psi MPa 80 000 550Yield strength, min, psi MPa 70 000 485Reduction of area, min, % 30A951/A951M 1
35、61210.2 In case a specimen fails to meet the tension or bendtest, the material shall not be rejected until two additionalspecimens taken from other wires in the same bundle havebeen tested. The material shall be considered as meeting thespecification in respect to any prescribed tensile property,pro
36、vided the tested average for the three specimens, includingthe specimen originally tested, is equal to or exceeds therequired minimum for the particular property in question, andfurther provided that none of the three specimens develops lessthan 80 % of the required minimum for the tensile property
37、inquestion. The material shall be considered as meeting thisspecification in respect to bend test requirements provided bothadditional specimens satisfactorily pass the prescribed bendtest.10.3 Any material that is found not to meet the requirementsof this specification subsequent to its acceptance
38、at the manu-facturers facilities shall be subject to rejection and themanufacturer shall be notified promptly.10.4 Welded joints shall withstand normal shipping andhandling without becoming broken, but the presence of brokenwelds, regardless of cause, shall not constitute cause forrejection unless t
39、he number of broken welds per bundleexceeds 1 % of the total number of joints in a bundle.10.5 In the event of rejection because of failure to meet theweld shear requirements, four additional specimens shall betaken from four different bundles and tested in accordance with5.5. If the average of all
40、the weld shear tests performed doesnot meet the requirement, the material shall be rejected.10.6 In the event of rejection because of failure to meet therequirements for dimensions, the amount of material rejectedshall be limited to those bundles which fail to meet thisspecification.10.7 Rust, surfa
41、ce seams, or surface irregularities will notbe cause for rejection provided the minimum dimensions,cross-sectional area, and tensile properties of a hand wirebrushed test specimen are not less than the requirements of thisspecification.10.8 RehearingRejected materials shall be preserved for aperiod
42、of at least two weeks from the date of inspection, duringwhich time the manufacturer shall have the option to makeclaim for a rehearing and retesting.11. Certification11.1 If outside inspection is waived, a manufacturers cer-tification that the material has been tested in accordance withand meets th
43、e requirements of this specification shall be thebasis of acceptance of the material. The certification shallinclude the specification number, year-date of issue, andrevision letter, if any.11.2 A material test report, certificate of inspection, orsimilar document printed from or used in electronic
44、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 requirements of the invoked ASTMstandard(s) and conform to any existing EDI agreement b
45、e-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 3The industry definition as invoked here is: EDI is thecomputer-to-computer exchange of business information in a stand
46、ardformat such as ANSI ASC X12.12. Packaging and Marking12.1 Joint reinforcement shall be assembled in bundlescontaining 250 to 500 linear feet 75 to 150 metres andsecurely fastened together.12.2 Each bundle shall have attached thereto a suitable tagbearing the name of the manufacturer, description
47、of thematerial, ASTM A951/A951M, and other such information asspecified by the purchaser.13. Keywords13.1 cross wires; deformed; galvanized wire; hot-dippedgalvanized; joint reinforcement; ladder type; longitudinalwires; tensile properties; truss type; weld shear strengthAPPENDIX(Nonmandatory Inform
48、ation)X1. WELD SHEAR TESTINGX1.1 ScopeThis appendix provides information leadingto a better understanding of the purpose and significance of theweld shear strength provisions of this specification.X1.2 BackgroundJoint reinforcement has been used in themasonry industry since 1940. For most of the per
49、iod since then,its manufacture has been limited to a relatively small group ofproducers and users who simply referred to “manufacturersrecommendations” as the standard of quality and acceptance.With the adoption of a new consensus standard for the designof masonry, it became clear that a standard for the manufactureof joint reinforcement was needed. In developing this standardit was decided to use a format similar to that used for theASTM Standard Specification for Carbon-Steel Wire andWelded Wire Reinforcement,
