30 CFR 57.19021 - Minimum rope strength.

§ 57.19021 Minimum rope strength.
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:
(a) Winding drum ropes (all constructions, including rotation resistant).
For rope lengths less than 3,000 feet: Minimum Value=Static Load×(7.0−0.001L)
For rope lengths 3,000 feet or greater: Minimum Value=Static Load×4.0.
(b) Friction drum ropes.
For rope lengths less than 4,000 feet: Minimum Value=Static Load×(7.0−0.0005L)
For rope lengths 4,000 feet or greater: Minimum Value=Static Load×5.0.
(c) Tail ropes (balance ropes).
Minimum Value=Weight of Rope×7.0

Title 30 published on 2014-07-01

no entries appear in the Federal Register after this date.

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


United States Code