1、Designation: A491 11Standard 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 last revision. A numb
2、er 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 stated in inch-pound
3、 units are to be regardedas the standard. The values given in parentheses are forinformation only.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA700 Practices for Packaging, Marking, and Loading Meth-ods for Steel Products for Shi
4、pmentA817 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 Steel Mill Products, Preparation for
5、 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 inthe form of knuckling or of twistin
6、g 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 unfinished (12) or full opening at theother
7、 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 twistinga term used to describe the t
8、ype 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 of selvage is not used on fabric wit
9、h 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),4.1.4 Height of fabric (Section 9),
10、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 original footage of the rolls beforesamplin
11、g, 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 from which the fabric is woven shall
12、 conformto all requirements of Specification A817 for Type I coating.6. Weave6.1 The wire shall be woven throughout in the form ofapproximately uniform square mesh, having parallel sides andhorizontal and vertical diagonals of approximately uniform1This specification is under the jurisdiction of AST
13、M Committee F14 on Fencesand is the direct responsibility of Subcommittee F14.40 on Chain Link Fence andWire Accessories.Current edition approved June 1, 2011. Published June 2011. Originallyapproved in 1963. Last previous edition approved in 2010 as A491 - 10. DOI:10.1520/A0491-11.2For referenced A
14、STM 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, Bldg. 4 Section D, 700Ro
15、bbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.dimensions. The top and bottom of the fabric shall be knuckledor twisted as specified in Section 10.6.2 Typical diamond count for ea
16、ch 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 in Table 2 (seeFig. 1).7.2 The permissible variation f
17、rom 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.(25.4 mm) and under.7.3 The size of mesh shall be determined by measuring theminimum clear distance between the wires forming the parallelsides of the mesh, a
18、nd 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 diameter of the coated wire of60.005 in. (60.13 mm).9. Height
19、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 knuckles.The permissible variation from the specified heig
20、ht 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- or 218-in. (50- or 54-mm) mesh, in heights 60 in. (15
21、20mm) 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: Twisted selvages for fence fabric under 72 in. (1830mm
22、) 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 Table 3).12. Breaking Strength12.1 Wire constituting the f
23、abric 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 shall consist ofindividual pickets from a section of th
24、e 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 between two adjacentstraightened bends.13. Workmanship, Finis
25、h, 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 withoutpenetrating to the substrate, except at the selvage cut e
26、nds, 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.NOTE 3Rust formations on the cut ends of the wire at the fabricselvages are inherent characteristics of this material and d
27、o not warrantrejection 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.TABLE 1 Typical Diamond CountANOTE 1Other diamond counts are permitted (see 6.2).NOTE 2 For fabric heights over 144
28、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 1112 1312 1512 1912 2312 2712 3112 3512 3912 41120
29、.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 23 29 35 41 46 52 58 700.120 1 20 23 27 33 39 45
30、 53 61 67 790.113 218 912 1112 1312 1612 1912 . . . . .ASee Appendix X1 for metric equivalents.A491 11214.2 The length of roll shall be determined by unrolling aroll of fabric on a flat surface and exerting tension byappropriate means to remove all slack. The tension appliedshall not reduce the actu
31、al height of the fabric by more than116in./ft (5.3 mm/m) of height or by more than12 in. (12.7 mm),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 as a sample for test purposes. In nocase shall less than two sam
32、ples 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), height of fabric (Section 9), selvage (Section10) and length
33、(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 ofTABLE 2 Sizes of Wire and MeshANOTE For fabric heights over 144 in., see 9.1.Specified Diameter ofCo
34、ated 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, 108, 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 3
35、6, 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, 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
36、, 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, 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
37、 in., and38 in. fence fabric.CThis mesh size and smaller is recommended for swimming pools.DThese sizes are designed for security 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 m
38、m) 118 in. (29 mm)FIG. 1 Mesh Dimensions for38 in.(9mm),12 in. (13 mm), and58in. (16 mm) Fence FabricTABLE 3 Minimum Weight 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
39、(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 CoatedWire, 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 113whic
40、h shall meet the requirements in every respect; otherwise,the lot represented by the samples may be rejected.16. Inspection16.1 Unless otherwise specified in the purchase order orcontract, the manufacturer is responsible for the performanceof all inspection and test requirements specified in this sp
41、eci-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 purchaser at the timethe order is placed. The purchaser shall have the r
42、ight 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 specified in the purchase order or contract, aproducers or suppliers certificati
43、on 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 contract, a report of the test results shall befurnished.18. Packaging, Mar
44、king, 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 fabric in the roll, ASTM DesignationA491, and the name or mark of the man
45、ufacturer.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 the U.S. government,when Level A is specified, preservation, packaging, and
46、 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 the requirements specifiedin the contract or order, shall be in accordanc
47、e 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/fen
48、cing materials; chain linkAPPENDIX(Nonmandatory Information)X1. Approximate Metric Equivalents for Table 1 and Table 2TABLE X1.1 Approximate Metric Equivalents for Table 1 andTable 2Sizes of Wire and Mesh Height of Fence Fabricin. mm in. mm0.192 4.88 36 9100.148 3.76 42 10700.135 3.43 48 12200.120 3
49、.05 60 15200.113 2.87 72 18301 25 84 2130114 32 . .134 44 96 24402 50 108 27402! 54 120 3050144 3660A491 114ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin 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 r
