RR-F-191/1F
3. REQUIREMENTS
3.1 Fabric. The chain-link fence fabric shall be helically woven into a diamond mesh. Fabric shall be woven from the type of wire, mesh size and wire gage size, and to the height selected (see 1.2 and 6.1)
3.2 Steel wire. Unless otherwise specified (see 6.1) the steel wire for the fabric shall be of such quality and purity that, when drawn to the wire gage size specified, the wire shall have a
minimum tensile strength of 75,000 pounds per square inch when tested in accordance with 4.4.3. The breakload for steel is: 11 gage - 850 pounds; 9 gage - 1290 pounds; and 6 gage - 2170 pounds. The breakload for aluminum alloy is 9 gage - 925 pounds; 6 gage - 1560 pounds.
3.3 Wire gage size. Wire for fabric shall be of the wire gage size selected (see 1.2 and 6.1). The outside diameter cited in 1.2 is the metal wire diameter allowable for that wire gage size and includes the metallic coating. When type IV wire required, the wire gage shall be that of the core wire only, the PVC coating shall not be considered when determining wire size. Tolerance for wire size ± 0.005 inches.
3.4 Type I, zinc-coated steel wire. Unless otherwise specified (see 6.1), the minimum weight of coating on the wire shall be 1.2 ounces of zinc per square foot of coated surface area when determined in accordance with 4.4.2.1.
3.5 Type II, aluminum-coated steel wire. The minimum weight of aluminum coating for 6- and
9- gage wire shall be 0.4 ounces per square foot. The minimum weight of aluminum coating for
11-gage wire shall be 0.35 ounces per square foot. Weight of aluminum shall be determined in accordance with 4.4.2.2.
3.6 Type III, Aluminum alloy wire. The aluminum wire shall conform to the requirements of
ASTM B211, alloy 6061-T94.
3.7 Type IV, PVC coated over zinc or aluminum coated steel wire. The PVC coating shall meet the requirements of 3.7.1 thru 3.7.4. Minimum thickness of the PVC coating shall be 0.007 inches as determined in 4.4.4.1. Unless otherwise specified (see 6.1), the method of applying the PVC coating (see 6.4) shall be the manufacturer's option. Minimum weight of zinc coating on
the steel wire shall be 0.4 ounces per square foot for 6 gage and 0.3 ounces per square foot for 9 and 11 gage. Aluminum coated steel wire shall meet the requirements of 3.5.
3.7.1 Color of PVC-coated wire. The color of PVC-coated wire shall be one of the standard colors (dark green, olive green, brown or black) cited in ASTM F934 as specified (see 6.1). When colors not cited in ASTM F934 are required, the color shall be as specified (see 6.1).
3.7.2 Weaveability to PVC coated wire. PVC coated wire shall be capable of being woven in to fabric without the PVC coating cracking, crazing, or peeling.
3.7.3 Accelerated ageing of PVC coating. PVC coating shall not shrink more than 1/16 inch per foot of length, demonstrate a significant visual change in color or gloss, or exhibit breaks, cracks, crazing, crumbling, or other visual forms of failure when tested in accordance with 4.4.4.2.
3.7.4 Flexibility of PVC coating. PVC coating shall demonstrate flexibility by exhibiting no breaks, cracks, crazing, crumbling, or other visual forms of failure of the coating when tested in accordance with 4.4.4.3.
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