RR-W-410G
TABLE I. Tensile strength requirements of main wires removed from finished rope.
Rope grade |
Tensile strength (minimum) |
|
Bright (uncoated) or galvanized (lb./in.2) |
Galvanized at finish size (lb./in.2) |
|
Designated commercially as: Annealed steel Iron Phosphor bronze Corrosion-resistant steel |
--- 70,000 90,000 205,000 |
60,000 55,000 --- --- |
TABLE II. Permissible variations in wire diameters of one diameter wires removed from finished ropes.
|
Wire diameters (inch) |
Bright (uncoated) and galvanized wires (inch) |
Zinc coated at finish size (inch) |
0.010 - 0.027 0.028 - 0.059 0.060 - 0.092 0.093 - 0.141 0.142 - 0.200 0.201 - 0.250 |
0.0015 0.002 0.0025 0.003 0.0035 0.004 |
-- 0.0035 0.0045 0.0055 0.0075 0.0095 |
TABLE III. Rope or strand diameters for all ropes except type II elevator, type III spring lay, type IV, 5 by 19 marline clad, type V, seizing strand, and type VI, small cords.
Rope diameter (inch) |
Tolerance (percent) |
|
Under |
Over1 |
|
3/16 7/32 1/4 5/16 3/8 and larger |
0 0 0 0 0 |
7 6 6 6 5 |
1 A question may develop as to whether or not the wire rope complies with the oversize tolerance. In such cases, a tension of not less than 10 percent nor more than 20 percent of nominal required breaking strength (force) is applied to the rope and the rope again measured while under this tension.
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