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

than 16 nor more than 24 wires. The second layer from the outside shall have not less than 22 nor more than 30 wires. The outer layer shall have not less than 22 nor more than 30 wires. Wires in the third layer from the outside shall be of one diameter. Wires in the second layer from the outside shall be of one diameter. Wires in the outer layer shall be of one diameter. Each strand shall be fabricated in three operations.

3.11.6.4 Type I, general purpose, class 6, construction 3, 6 by 91 (3 operations). Wire rope grades improved plow steel and extra improved plow steel shall be in accordance with the requirements specified herein.

3.11.6.4.1 Wire ropes shall have 1 core and 6 strands of not less than 75 nor more than 103 wires each, totaling not less than 450 nor more than 618 wires in the strands. This construction is not furnished in lang lay and it is not furnished preformed. This construction shall not be required in sizes smaller than 2-1/2 inches.

3.11.6.4.2 Each strand shall have 1 center strand of 29 to 49 wires constructed in accordance with

3.11.3.5.2, 3.11.3.6.2, 3.11.3.7.2, 3.11.3.8.2, or 3.11.3.9.2. The second layer from the outside shall have not less than 20 nor more than 24 wires. The outer layer shall have not less than 26 nor more than 30 wires. Wires in the second layer from the outside shall be of one diameter. Wires in the outer layer shall be of one diameter. Each strand shall be fabricated in three operations.

3.11.6.5 Type I, general purpose, class 6, construction 4, 6 by 91 (2 operations). Wire rope grades improved plow steel and extra improved plow steel shall be in accordance with the requirements specified herein.

3.11.6.5.1 Wire ropes shall have 1 core and 6 strands of not less than 75 nor more than 109 wires each, totaling not less than 450 nor more than 654 wires in the strands. This construction is not furnished in lang lay and it is not furnished preformed. This construction shall not be required in sizes smaller than 2-1/2 inches.

3.11.6.5.2 Each strand shall have 1 center strand of 31 to 49 wires constructed in accordance with 3.11.3.5.2, 3.11.3.6.2, 3.11.3.7.2, 3.11.3.8.2, or 3.11.3.9.2. The second layer from the outside shall have not less than 22 nor more than 30 wires. The outer layer shall have not less than 22 nor more than 30 wires. Wires in the second layer from the outside shall be of one diameter. Wires in the outer layer shall be of one diameter. Each strand shall be fabricated in two operations.

3.12 Type II, elevator.

3.12.1 Material. Material shall be carbon steel as specified (see 3.1 and 6.2(s-1)). When specified (see 6.2(s-1)), elevator wire ropes of 11/16, 13/16, and 15/16-inch diameters may be of high-rise special steel of greater strengths.

3.12.1.1 Finish. Elevator wire ropes shall be of bright (uncoated) wires in accordance with 3.3.5.1.

3.12.1.2 Cores. Cores shall be fiber cores in accordance with 3.2.1 or 3.2.5.