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

the actual diameter of wire ropes and strands shall not differ from the ordered diameter by more than the amounts shown in ASTM A1023/A1023M or tables III and IV, as applicable.

3.7.1 Traction steel and iron elevator wire rope. The maximum diameter tolerance based on nominal rope diameter shall be as shown in the maximum (no load) column of the applicable table. With a load of 10 percent of minimum breaking strength (force), the minimum diameter tolerance based on nominal rope diameter shall be plus 1/128 inch.

3.8 Seizing. Each end of each length of wire rope shall be suitably seized.

3.9 Mechanical properties. Mechanical properties for wire in ropes and strands shall be as specified in table I and ASTM A1023/A1023M, except for filler wires, non-round wires, wires in wire strand cores, and wires in IWRCs (see 3.2.2 and 3.2.3).

3.10 Workmanship. Wire ropes shall be uniform in material and quality and shall be securely laid free from kinks, loose wires, loose strands, or other defects that may be detrimental to their serviceability and appearance. Protruding wires are considered a defect and not more than one broken wire will be accepted in 1000 feet of wire rope.

3.11 Type I, general purpose.

3.11.1 Type I, general purpose, class 1, 6 by 7 (see figure 5 for typical construction).

3.11.1.1 Wire rope shall have 6 strands of 7 wires totaling 42 wires, laid around a fiber core as specified (see 3.11.1.3.4).

3.11.1.2 Each strand shall have 1 wire center and 6 outer wires. Wires in the outer layer shall be of one diameter. Each strand shall be fabricated in one operation.

3.11.1.3 Material. Material shall be carbon steel as specified (see 3.1 and 6.2(m-1).

3.11.1.3.1 Improved plow steel wire rope grade. Type I, general purpose, improved plow steel wire rope grade shall be in accordance with ASTM A1023/A1023M (see 3.1.1).

3.11.1.3.2 Galvanized iron wire rope grade. Type I, general purpose, galvanized iron wire rope grade shall be in accordance with the requirements specified herein.

3.11.1.3.3 Finish. Wire ropes of iron shall be of zinc coated (galvanized) wires, and unless a zinc coating material is specified (see 3.3.5 and 6.2(m-2)), improved plow steel shall be of bright (uncoated) wires.

3.11.1.3.4 Cores. Cores shall be of fiber as specified (see 3.2.1, 3.2.5, and 6.2(m-3)).

3.11.1.3.5 Fabrication. Wire ropes shall be fabricated as specified (see 3.4 and 6.2(m-4)).

3.11.1.3.6 Lay. Unless otherwise specified (see 6.2(m-5)), wire ropes shall be supplied with right regular lay (see 3.4.4.1).