StacksVerified U.S. regulatory reference

30 CFR §56.19021

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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:
  1. (a)Winding drum ropes (all constructions, including rotation resistant).
  2. (b)Friction drum ropes.
  3. (c)Tail ropes (balance ropes).