ASTM_A_740_-_98_2014.pdf

Designation:A74098(Reapproved 2014)Standard Specification forHardware Cloth(Woven or Welded Galvanized Steel WireFabric)1This standard is issued under the fixed designation A740;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers woven or welded galvanizedsteel wire fabric commercially known as hardware cloth.It iscustomarily used for window and screen door guards,treeguards,industrial machine guards,sand screens,and grain bins.It serves as a protective screen against rodents and is used formany other home,farm,and industrial purposes.1.2 The values stated in inch-pound units are to be regardedas the standard.2.Referenced Documents2.1 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsB6 Specification for ZincE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 Military Standards:3MIL-STD-129 Marking for Shipment and StorageMIL-STD-147 Palletized and Containerized Unit Loads 40Inch 48 Inch Pallets,Skids,Runners,or Pallet TypeBaseMIL-STD-1188 Commercial Packaging of Supplies andEquipment3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 hardware clothas used in this specification,desig-nates a material composed of cold-drawn steel wires whichhave been fabricated into fabric(or so-called“mesh”),formedby the process of weaving or electrical welding,and subse-quently galvanized(zinc coated)by the hot-dip process.Thefinished material consists essentially of a series of longitudinal(warp)and transverse(filler)wires arranged substantially atright angles to each other.3.1.2 mesh sizeas it pertains to cloth,is the dimensionalcenter-to-center distance between warp wires and filler wires inthat order.Measurements include the width of one openingplus the thickness of one parallel zinc-coated wire.Examplesare 1 by 2 in.,12by 1 in.,etc.Thus,a 1 by 2-in.mesh denotesthat the warp and filler wires are spaced on 1-in.25.4-mm and2-in.50.8-mm centers respectively.For fabric with a squaremesh the mesh size is indicated by a single value.4.Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity(number of rolls),4.1.2 Name of material(1.1),4.1.3 Mesh size(Table 1),4.1.4 Wire size(Table 1),4.1.5 Width(5.7.1),4.1.6 Roll length(5.7.2),4.1.7 Woven or welded,if necessary(Table 1),and4.1.8 ASTM designation and year of issue.NOTE1A typical ordering description is as follows:“ten 100-ft Rollsof14-in.Hardware Cloth,Wire Size 0.0258 in.,24 in.wide,to ASTMA740.”5.Manufacture5.1 Base MetalThe base metal of hardware cloth shall beof good commercial quality carbon steel wire.5.2 Zinc for Coating The zinc used in the galvanizingprocess shall be any grade of zinc conforming to SpecificationB6.5.3 Fabrication Hardware cloth shall be of wire woven orwelded into squares or rectangles and then galvanized by thehot-dip process.The mesh size and wire size after galvanizing1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Productsand is the direct responsibility of Subcom-mittee A05.12 on Wire Specifications.Current edition approved May 1,2014.Published May 2014.Originallyapproved in 1976.Last previous edition approved in 2008 as A740 98(2008).DOI:10.1520/A0740-98R14.2For 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,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/www.dodssp.daps.mil.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 shall conform to Table 1.Approximate weights for the productare also shown in Table 1.5.4 Mesh CountThe mesh size in inches shall be deter-mined by counting the meshes for any interval of one continu-ous linear foot,in the direction of either the warp or filler wiresand finding the mesh size in Table 2.5.5 Wire Diameter All wire diameter designations in thisspecification for hardware cloth are finished sizes after galva-nizing.Wire diameter for the warp and filler wires shall bedetermined separately by checking the average measureddiameters of not less than ten warp wires and the same numberof filler wires,taken at random from a single roll of finishedhardware cloth.5.6 Weight of Coating:5.6.1 The weight of zinc coating shall be determined on asample of cloth approximately 25 in.2161 cm2 in area.Thecoati