RR-W-410 Wire Rope And StrandThis specification covers wire ropes and wire seizing strands see 6.1. This specification does not include all types, classes, constructions, and sizes of wire rope and strand that are commercially available, but it is intended to cover the more common types, classes, constructions, and sizes that are suitable for federal government use.

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RR-W-410G

3.3.5 Finish.

3.3.5.1 Bright (uncoated) carbon steel. Unless otherwise specified (see 6.2(g)), wire used in wire ropes shall be bright (uncoated) carbon steel.

3.3.5.2 Zinc coating (galvanized). When specified (see 6.2(h)), zinc coating shall be applied by either the electrolytic plating process or by hot dipping in molten zinc. The weight of the zinc coating on each wire shall be as specified in ASTM A1023/A1023M.

3.3.5.2.1 The zinc coating shall be free from deleterious uncoated spots, lumps, pits, blisters, gritty areas, dross, and flux.

3.4 Fabrication.

3.4.1 Wire rope. A wire rope shall consist of a specified number of wire strands closed around a core. Each strand shall be constructed as specified in the detail requirements for the individual class and construction.

3.4.1.1 Rope and strand wires. Wires in the same layer of wire ropes and strands shall be considered of one diameter when the difference between the largest and the smallest diameters does not exceed the values shown in table II.

3.4.2 Wire joints. Wires up to and including 0.014 inch in diameter may be spliced by twisting. Wires larger than 0.014 inch in diameter shall be joined by lap brazing or butt welding. Butt welds shall be annealed.

3.4.2.1 Twisted splices of wires of any one layer of a strand shall not be closer than 20 feet. Brazed or butt-welded joints in the wires of a strand shall not be closer than 18 inches.

3.4.3 Preformed and non-preformed wire ropes and strands. Unless otherwise specified (see

6.2(i)), the contractor shall supply either preformed or non-preformed wire ropes and strands as specified in 3.4.3.1 and 3.4.3.2.

3.4.3.1 Preformed wire ropes and strands. Wire ropes in which the strands and their wires are permanently shaped during fabrication to a spiral form they assume in the finished wire rope or strand shall be identified as preformed wire ropes or strands.

3.4.3.2 Non-preformed wire ropes and strands. Wire ropes in which the strands and their wires are not permanently shaped during fabrication to a spiral form they assume in the finished wire rope or strand shall be identified as non-preformed wire ropes or strands.

3.4.4 Lays (see figure 4). Wire rope lays shall be as specified in the detail requirements for the individual wire ropes and strands.

3.4.4.1 Right regular lay. Wires in the strand are laid to the left, and strands in the rope are laid to the right.