§75.1431. Minimum rope strength.
30 C.F.R. § 75.1431
At installation, the nominal strength (manufacturer's published catalog strength) of wire ropes used for hoisting shall meet the minimum rope strength values obtained by the following formulas in which “L” equals the maximum suspended rope length in feet:
Winding drum ropes— (all constructions, including rotation resistant).
Friction drum ropes.
Tail ropes— (balance ropes).
Notes, amendments, and revision history
Amendments
[48 FR 53239, Nov. 25, 1983; 48 FR 54975, Dec. 8, 1983]
Source
Source: Sections 75.1429 through 75.1438 appear at 48 FR 53239, Nov. 25, 1983, unless otherwise noted.
Authority
Authority: 30 U.S.C. 811, 813(h), 957.
Source
Source: 35 FR 17890, Nov. 20, 1970, unless otherwise noted.
Amendments
[48 FR 53239, Nov. 25, 1983; 48 FR 54975, Dec. 8, 1983]