1、Designation: A 951/A 951M 06Standard Specification forSteel Wire for Masonry Joint Reinforcement1This standard is issued under the fixed designationA 951/A 951M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revi
2、sion. 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 masonry joint reinforcementfabricated from cold-drawn steel wire. Joint reinforcementconsists of lo
3、ngitudinal wires welded to cross wires.1.2 The values stated in inch-pound or SI units are to beregarded as standard. Within the text the inch-pound units areshown in brackets. The values stated in each system are notexact equivalents; therefore, each system must be used inde-pendently of the other.
4、 Combining values may result innonconformance with the specification.2. Referenced Documents2.1 ASTM Standards:2A 82/A 82M Specification for Steel Wire, Plain, for Con-crete ReinforcementA 152/A 152M Specification for Wrought Iron Rivets andRivet Rounds3A 185/A 185M Specification for Steel Welded Wi
5、re Rein-forcement, Plain, for ConcreteA 496/A 496M Specification for Steel Wire, Deformed, forConcrete ReinforcementA 580/A 580M Specification for Stainless Steel WireA 641/A 641M Specification for ZincCoated (Galvanized)Carbon Steel Wire3. Ordering Information3.1 It shall be the responsibility of t
6、he purchaser to specifyall requirements that are necessary for the manufacture anddelivery of the wire under this specification. Such requirementsto be considered include, but are not limited to, the following:3.1.1 Quantity (metres linear feet),3.1.2 Type (truss, ladder),3.1.3 Width (nominal thickn
7、ess of masonry wall),3.1.4 Wire size and wire specification,3.1.5 Finish (see Section 6),3.1.6 Packaging (see Section 12), and3.1.7 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 con
8、form to theapplicable provisions of Specification A 82/A 82M or A 580/A 580M, Type 304, except 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
9、 product.4.3 Longitudinal and cross wires shall be securely con-nected at every intersection by 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
10、 around the perimeter of the wire at amaximum spacing of 0.7 times the diameter or width of thewire, but not less than eight sets per 25 mm 1 in. 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 Speci
11、fication A 496/A 496M.5. Mechanical Requirements5.1 Tensile PropertiesWire used in the fabrication 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
12、product and tested either across or betweenthe welds. No less than 50 % shall be across welds.5.2.2 Tension tests across a weld shall have the welded jointlocated approximately at the center of the wire being tested.5.2.3 Tensile strength shall be the average of four test valuesdetermined by dividin
13、g 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 measure-ment shall be made only when rupture has occurred at asufficient distance from the center of the weld
14、to permit anaccurate measurement of the fractured section. Additional1This 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 Sept. 1, 2006.
15、Published September 2006. Originallyapproved in 1996. Last previous edition approved in 2002 as A 951 02.2For 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 standar
16、ds Document Summary page onthe ASTM website.3Withdrawn.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.testing is permitted when a suitable ruptured section is notobta
17、ined from the initial test. The wire shall meet the minimumreduction of area requirements of Table 1.5.4 Weld Shear StrengthThe weld shear strength in New-tons shall not be less than 172 multiplied by the nominal areain square millimetres or in pounds-force shall not be less than25 000 multiplied by
18、 the specified nominal area of the largerwire in square inches.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
19、wire.5.5 Weld Shear Strength Tests:5.5.1 Test specimens shall 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
20、shall be placed in the anvil of the testing devicewhich is secured in the tensile machine and the load thenapplied to the longitudinal wire.5.5.3 Weld shear strength shall be the average test load inNewtons pounds of four test specimens selected at random.5.6 Bend Tests:5.6.1 Test specimens shall be
21、 obtained from the fabricatedproduct by cutting a section of longitudinal 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
22、 the minimum dimension isperpendicular to the axis of the pin.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
23、 one of the following:6.1.1 Mill GalvanizedZinc coated, in accordance with thehot-dip method of Specification A 641, with a minimum of 30g/m20.1 oz per sq. ft. of surface area. It shall be permissibleto apply the coating before fabrication.6.1.2 Hot-Dip GalvanizedZinc coated, by the hot-dipmethod, i
24、n accordance with Specification A 153/A 153M,Class B (average zinc coating of 458 g/m21.50 oz per sq. ft.).The coating shall be applied after fabrication.7. Dimensions and Tolerances7.1 Longitudinal WiresThe minimum size of longitudinalwires shall be MW7 W1.1.7.2 Cross WiresThe minimum size of cross
25、 wires shall beMW7 W1.1. Cross wires shall not project beyond the outsidelongitudinal wires by more than 3 mm 18 in.7.3 WidthThe width of joint reinforcement is defined asthe out-to-out distance of outside longitudinal wires. Widthshall not vary by more than 3 mm 18 in. from the manufac-turers speci
26、fied standard dimension. Width shall be measuredas follows:7.3.1 Ladder Type Joint Reinforcement At opposite weldpoints, and7.3.2 Truss Type Joint Reinforcement From a weld pointon one longitudinal wire perpendicular to a point on theopposite wire between adjacent weld points.7.4 LengthThe length of
27、 pieces of joint reinforcementshall not vary by more than 13 mm 12 in. 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
28、dimensions of both longitudinal and crosswires to the nearest 0.030 mm 0.001 in.7.5.3 Measure the gaps between the ends of deformationsaround the circumference of the wire to the nearest 0.030 mm0.001 in.8. Number of Tests8.1 Number of TestsOne set of each test described hereinshall be performed for
29、 each 91 500 m 300 000 linear feet ofjoint reinforcement, but not less than one set each week.9. Inspection9.1 The inspector representing the purchaser shall have freeentry at all times, while work on the contract of the purchaseris being performed, to all parts of the manufacturers facilitiesthat c
30、oncern the manufacture of the material ordered. Themanufacturer shall afford the inspector all reasonable facilitiesto assure that the material is being furnished in accordance withthis specification.9.2 Except for yield strength, all tests and inspections shallbe made at the place of manufacture pr
31、ior to shipment, 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 SpecificationA 82, tension tests shall be made by a
32、recognized laboratory, orby the wire supplier, observed by the purchasers representa-tive if desired, provided such tests do not interfere unneces-sarily with manufacturing operations.10. Rejection and Rehearing10.1 Material that does not meet the requirements of thisspecification, shall be subject
33、to rejection. Unless otherwisespecified, any rejection shall be reported to the manufacturerwithin five days from the time of selection of test specimens.10.2 In case a specimen fails to meet the tension or bendtest, the material shall not be rejected until two additionalspecimens taken from other w
34、ires in the same bundle havebeen tested. The material shall be considered as meeting thespecification in respect to any prescribed tensile property,provided the tested average for the three specimens, includingTABLE 1 Tension Test RequirementsTensile strength, min, MPa ksi 550 80Yield strength, min,
35、 MPa ksi 485 70Reduction of area, min, % 30A 951/A 951M 062the 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
36、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
37、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
38、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
39、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
40、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
41、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
42、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
43、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
44、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
45、ardformat such as ANSI ASC X12.12. Packaging and Marking12.1 Joint reinforcement shall be assembled in bundlescontaining 75 to 150 metres 250 to 500 linear ft. and securelyfastened together.12.2 Each bundle shall have attached thereto a suitable tagbearing the name of the manufacturer, description o
46、f thematerial,ASTMA 951, and other such information as specifiedby 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 Information)X1
47、. 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 inthe masonry industry since 1940. For most of the period sinc
48、ethen, its manufacture has been limited to a relatively smallgroup of producers and users who simply referred to “manu-facturers recommendations” as the standard of quality andacceptance. With the adoption of a new consensus standard forthe design of masonry, it became clear that a standard for them
49、anufacture of joint reinforcement was needed. In developingthis standard it was decided to use a format similar to that usedfor theASTM Standard for Welded Wire Reinforcement, Plain,for Concrete, Specification A 185/A 185M, since many peoplehad the notion that joint reinforcement was used in a mannersimilar to wire mesh. A significant difference between wiremesh and joint reinforcement arose when an attempt was madeto fashion the requirements for weld shear strength after thosein Specification A 185/A 185M.X1.3 Ma
