1、Designation: A491 11 (Reapproved 2017)Standard Specification forAluminum-Coated Steel Chain-Link Fence Fabric1This standard is issued under the fixed designation A491; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of las
2、t revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers aluminum-coated steel chain-link fence fabric, aluminum-coated before weaving.1.2 The values st
3、ated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment
4、 of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA700 Guide for Packaging, Marking, and Loadin
5、g Methodsfor Steel Products for ShipmentA817 Specification for Metallic-Coated Steel Wire forChain-Link Fence Fabric and Marcelled Tension Wire2.2 Federal Standard:3Fed. Std. No. 123 Marking for Shipment, Civil Agencies2.3 Military Standards:3MIL-STD-129 Marking for Shipment and StorageMIL-STD-163 S
6、teel Mill Products, Preparation for Ship-ment and Storage3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 chain link fence fabrica fencing material made fromsteel wire helically wound and interwoven in such a manner asto provide a continuous mesh without knots or ties except in
7、the form of knuckling or of twisting the ends of the wires toform the selvage of the fabric.3.1.2 diamond countthe number of diamond openingsfrom one edge of the fabric to the other. The diamond count ofa given fabric shall begin at the first completed diamond at oneedge and continue to the unfinish
8、ed (12 ) or full opening at theother edge.3.1.3 knucklinga term used to describe the type of selvageobtained by interlocking adjacent pairs of wire ends and thenbending the wire ends back into a loop. The loop shall beclosed or nearly closed to a measurement less than the diameterof the wire.3.1.4 t
9、wistinga term used to describe the type of selvageobtained by twisting adjacent pairs of wire ends together in aclose helix of 112 machine turns, which is equivalent to 3 fulltwists, and cutting the wire ends at an angle. The wire endsbeyond the twist shall be at least14 in. (6.4 mm) long. Thistype
10、of selvage is not used on fabric with a mesh size of lessthan 2 in. (50.8 mm).4. Ordering Information4.1 Orders for chain-link fence fabric purchased to thisspecification shall include the following information:4.1.1 Quantity (Section 14),4.1.2 Size of mesh (Section 7),4.1.3 Size of wire (Section 8)
11、,4.1.4 Height of fabric (Section 9),4.1.5 Diamond count, if specified (Section 6),4.1.6 Type of selvage (Section 10),4.1.7 Certification if required (Section 17), and4.1.8 ASTM designation and year of issue.4.2 All rolls of fencing accepted by the purchaser shall bebilled on the basis of the origina
12、l footage of the rolls beforesampling, unless changed by contractual arrangement.NOTE 1A typical ordering description is as follows: 25 rolls, 50 fteach, chain-link fence fabric, aluminum-coated, 2 in. mesh. 0.148 in. wire,60 in. high, knuckled both selvages, to ASTM A491XX.5. Materials5.1 The wire
13、from which the fabric is woven shall conformto all requirements of Specification A817 for Type I coating.1This specification is under the jurisdiction of ASTM Committee F14 on Fencesand is the direct responsibility of Subcommittee F14.40 on Chain Link Fence andWire Accessories.Current edition approv
14、ed June 1, 2017. Published June 2017. Originallyapproved in 1963. Last previous edition approved in 2011 as A491 - 11. DOI:10.1520/A0491-11R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards vo
15、lume 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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
16、 19428-2959. United 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 T
17、echnical Barriers to Trade (TBT) Committee.16. Weave6.1 The wire shall be woven throughout in the form ofapproximately uniform square mesh, having parallel sides andhorizontal and vertical diagonals of approximately uniformdimensions. The top and bottom of the fabric shall be knuckledor twisted as s
18、pecified in Section 10.6.2 Typical diamond count for each standard height isshown in Table 1. Other diamond counts are permissibleprovided that they are consistent within a lot. The purchaserhas the option to specify the diamond count (4.1.5).7. Size of Mesh7.1 The size of mesh shall be as indicated
19、 in Table 2 (seeFig. 1).7.2 The permissible variation from the specified size ofmesh shall be 618 in. (63.2 mm) for all mesh sizes over 1 in.(25 mm), and 6116 in. (61.6 mm) for all mesh sizes 1 in. (25.4mm) and under.7.3 The size of mesh shall be determined by measuring theminimum clear distance bet
20、ween the wires forming the parallelsides of the mesh, and determined as the average of tworeadings taken at right angles to each other.8. Size of Wire8.1 Chain-link fabric shall be fabricated from wire diam-eters as listed in Specification A817, with a permissiblevariation from the specified diamete
21、r of the coated wire of60.005 in. (60.13 mm).9. Height of Fabric9.1 Chain-link fabric shall be furnished in the standardheights shown in Table 2. Custom order fabric is available inheights to and including 20 ft. (6.56 m). The height of fabricshall be the overall dimension from ends of twists or knu
22、ckles.The permissible variation from the specified height shall be 61in. (625 mm) for standard selvage on fabric with mesh sizes 1in. (25 mm) and over and 612 in. (613 mm) for all fabric withmesh sizes less than 1 in. (25 mm).10. Selvage10.1 Unless otherwise specified by the purchaser, fabricswith 2
23、- or 218-in. (50- or 54-mm) mesh, in heights 60 in. (1520mm) and under shall be knuckled at both selvages. Fabric 72in. (1830 mm) high and over shall be knuckled at one selvageand twisted at the other.10.2 The selvages of fabrics with meshes of less than 2 in.(50 mm) shall be knuckled.NOTE 2Caution:
24、 Twisted selvages for fence fabric under 72 in. (1830mm) in height are not recommended because of consumer safety consid-erations.11. Weight of Aluminum Coating11.1 The weight of aluminum coating on the wire in thefabric shall be as specified in Specification A817, for the wirediameter used (see Tab
25、le 3).12. Breaking Strength12.1 Wire constituting the fabric shall meet the minimumbreaking strength listed in the Breaking Strength Table ofSpecification A817 (see Table 4) when tested in accordancewith Test Methods and Definitions A370. Specimens used toestablish conformance with this requirement
26、shall consist ofindividual pickets from a section of the fence fabric. Thespecimen shall be of sufficient length so as to be firmly grippedin the testing machine after straightening. The actual gagelength (distance between jaws) of the specimen shall be limitedto the undeformed length of wire betwee
27、n two adjacentstraightened bends.13. Workmanship, Finish, and Appearance13.1 Chain-link fence fabric shall be produced by methodsrecognized as good commercial practices. The aluminizedbefore-weaving fabric shall be woven using proven industryprocedures to ensure a smooth consistent surface withoutpe
28、netrating to the substrate, except at the selvage cut ends, seeNote 3.13.2 Excessive roughness, blisters, and flaking shall benoted. These and other defects, if present to any considerableextent, shall provide a basis for rejection.TABLE 1 Typical Diamond CountANOTE 1Other diamond counts are permitt
29、ed (see 6.2).NOTE 2 For fabric heights over 144 in., see Section 9.Nominal Diameter CoatedWire, in.Size ofMesh, in.Height of Fence Fabric, in.36 42 48 60 72 84 96 108 120 1440.192 2 1012 1212 1312 1712 2012 2412 2712 3112 3412 41120.148 2 1012 1212 1312 1712 2012 2412 2712 3112 3412 41120.148 134 11
30、12 1312 1512 1912 2312 2712 3112 3512 3912 41120.148 114 17 21 23 29 35 41 46 52 56 700.148 1 20 23 27 33 39 45 53 61 67 790.135 2 1012 1212 1312 1712 2012 2412 2712 3112 3412 41120.120 2 1012 1212 1412 1712 2012 2412 . . . .0.120 134 1112 1312 1512 1912 2312 2712 3112 3512 3912 47120.120 114 17 21
31、23 29 35 41 46 52 58 700.120 1 20 23 27 33 39 45 53 61 67 790.113 218 912 1112 1312 1612 1912 . . . . .ASee Appendix X1 for metric equivalents.A491 11 (2017)2NOTE 3Rust formations on the cut ends of the wire at the fabricselvages are inherent characteristics of this material and do not warrantreject
32、ion of the fabric.14. Standard Length of Rolls14.1 The standard length of roll shall be 50 ft (15.24 m) 61 % except as otherwise agreed upon at the time of purchase.14.2 The length of roll shall be determined by unrolling aroll of fabric on a flat surface and exerting tension byappropriate means to
33、remove all slack. The tension appliedshall not reduce the actual height of the fabric by more than116 in. ft (5.3 mm/m) of height or by more than12 in. (12.7mm), whichever is less.15. Sampling and Number of Tests15.1 One roll from every 50 rolls or fraction thereof in a lotshall be taken at random a
34、s a sample for test purposes. In nocase shall less than two samples be tested except when the lotis less than 10 rolls only one roll shall be selected for thesample.15.2 Sample rolls selected shall be inspected for weave(Section 6), size of mesh (Section 7), diamond count (6.2), wiresize (Section 8)
35、, height of fabric (Section 9), selvage (Section10) and length (Section 14).15.3 If any specimen tested fails to meet the requirements ofthis specification, the roll represented by the specimen shall berejected and two additional rolls shall be inspected, both ofwhich shall meet the requirements in
36、every respect; otherwise,the lot represented by the samples may be rejected.TABLE 2 Sizes of Wire and MeshANOTE 1 For fabric heights over 144 in., see 9.1.Specified Diameter ofCoated Wire, in.Size, Coated Wire Gage Size of Mesh, in.BHeight of Fence Fabric, in.0.192 6 2 36, 42, 48, 60, 72, 84, 96, 10
37、8, 120, 1440.148 9 2 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.148 9 134 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.148C9114 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.148 9 1 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.148 912 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.135 10 2 36, 42, 48, 60, 72,
38、84, 96, 108, 120, 1440.120 11 2 36,42,48,60,72,840.120 11 134 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.120C11 114 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.120 11 1 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.120 1158D36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.120 1112D36, 42, 48, 60, 72, 84, 96,
39、108, 120, 1440.120 1138D36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.113 1112 218 36,42,48,60,72ASee Appendix X1 for metric equivalents.BSee Fig. 1 for mesh dimensions for58 in.,12 in., and38 in. fence fabric.CThis mesh size and smaller is recommended for swimming pools.DThese sizes are designed for s
40、ecurity purposes.Mesh Size, S Height, H Width, W38 in. (9 mm) mesh34 in. (19 mm)34 in. (19 mm)12 in. (13 mm) mesh1516 in. (24 mm)1516 in. (24 mm)58 in. (16 mm) mesh 118 in. (29 mm) 118 in. (29 mm)FIG. 1 Mesh Dimensions for38 in.(9mm),12 in. (13 mm), and58 in. (16 mm) Fence FabricTABLE 3 Minimum Weig
41、ht of Aluminum Coating for Type ISpecified Diameter ofCoated Wire, in. (mm)Minimum Weight of Coating,oz/ft2(g m2) of uncoated wire surface0.192 (4.88) 0.40 (122)0.148 (3.76) 0.40 (122)0.135 (3.43) 0.40 (122)0.120 (3.05) 0.35 (107)0.113 (2.87) 0.30 (92)TABLE 4 Breaking StrengthSpecified Diameter of C
42、oatedWire, in. (mm)Breaking Strength, min,lbf (N)0.192 (4.88) 2170 (9650)0.148 (3.76) 1290 (5740)0.135 (3.43) 1290 (5740)0.120 (3.05) 850 (3780)0.113 (2.87) 750 (3340)A491 11 (2017)316. Inspection16.1 Unless otherwise specified in the purchase order orcontract, the manufacturer is responsible for th
43、e performanceof all inspection and test requirements specified in this speci-fication. Except as otherwise specified in the purchase order orcontract, the manufacturer may use his own or any othersuitable facilities for the performance of the inspection and testrequirements unless disapproved by the
44、 purchaser at the timethe order is placed. The purchaser shall have the right toperform any of the inspection and tests set forth in thisspecification when such inspections and tests are deemednecessary to assure that the material conforms to prescribedrequirements.17. Certification17.1 When specifi
45、ed in the purchase order or contract, aproducers or suppliers certification shall be furnished to thepurchaser that the material was manufactured, sampled, tested,and inspected in accordance with this specification and hasbeen found to meet the requirements. When specified in thepurchase order or co
46、ntract, a report of the test results shall befurnished.18. Packaging, Marking, and Loading18.1 Each length of chain-link fence fabric shall be tightlyrolled and firmly tied. Each roll shall carry a tag showing thetype of coating, the specified wire size, mesh size, the specifiedlength and height of
47、fabric in the roll, ASTM DesignationA491, and the name or mark of the manufacturer.18.2 Unless otherwise specified, packaging, marking andloading for shipment shall be in accordance with PracticesA700.18.3 When specified in the contract or order, and for directprocurement by or direct shipment to th
48、e U.S. government,when Level A is specified, preservation, packaging, and pack-ing shall be in accordance with Level A requirements ofMIL-STD-163.18.4 When specified in the contract or order, and for directprocurement by or direct shipment to the U.S. government,marking for shipment, in addition to
49、the requirements specifiedin the contract or order, shall be in accordance with MIL-STD-129 for U.S. military agencies and in accordance with Fed. Std.No. 123 for civil agencies.19. Keywords19.1 aluminum coated (aluminized) iron and steel articles;aluminum coated (aluminized) steel chain link fence fabric;chain link fence; steel; coatings; aluminum (aluminized);fence/fencing materials; chain linkAPPENDIX(Nonmandatory Information)X1. Approximate Metric Equivalents for Ta
