§57.19021. Minimum rope strength.
30 C.F.R. § 57.19021
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
Authority
Authority: Sec. 101, Federal Mine Safety and Health Act of 1977, Pub. L. 91-173 as amended by Pub. L. 95-164, 91 Stat. 1291 (30 U.S.C. 811).
Authority
Authority: 30 U.S.C. 811.
Source
Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.