RR-F-191/1F
TABLE II. Classification of defects.
Defects Major Minor
Height of fabric not as specified. x Diamond count not as specified. x Length of wire not as specified. x Size of wire not as specified. x Size of wire not as specified. x Type of wire not as specified. x Selvage not as specified. x Color not as specified. x
Barbs on twisted and barbed selvage not sharp. x
Frozen joints on zinc-coated fabric. x Coating cut, scratched, or abraded exposing bare wire. x Plastic coating cracked, crazed, or peeling. x
4.3.1 Wire gage. Determine the diameter of types I, II, III and V wire by averaging two diameter measurements of the wire taken at right angles to each other (see 1.2 and 3.3.) The diameter of type IV wire shall be determined as above after removal of the PVC coating.
4.3.2 Size of mesh. Measure the clear distance in either direction between the wires forming the parallel sides of the mesh taking the mean of two dimensions at right angles to each other (see 1.2 and 3.9).
4.3.3 Length of barbs. Measure the wire ends along the inside of the twist from the last twist to the tip of barbs in twisted and barbed selvage (see 3.11.2).
4.3.4 Height of fabric. Measure the height with tension applied, between outer extremities of the fabric, including the overall dimension form ends of barbs or knuckles (see 3.12).
4.3.5 Length of fabric. When in rolls, measure the length by unrolling the rolls on a flat surface and apply tension to remove slack. Tension applied shall not reduce the actual height of the fabric by more than 1/16 inch per foot of height or by more than 1/2 inch in overall height, whichever is less (see 3.13).
4.4 Test methods.
4.4.1 Specimens. At least two specimens for each test shall be obtained from one linear foot of fabric cut from one of the rolls selected in accordance with 4.2.
4.4.2 Weight and thickness of metallic coatings.
4.4.2.1 Zinc and Zn-5Al-MM coat. Determine weight of zinc and Zn-5Al-MM in accordance with ASTM A90 (see 3.4 and 3.7).
4.4.2.2 Weight of aluminum coat. Determine weight of aluminum coating in accordance with
ASTM A428 (see 3.5).
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