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

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.

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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

Title 30 published on 2015-10-21

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 30 CFR Part 57 after this date.

  • 2017-01-09; vol. 82 # 5 - Monday, January 9, 2017
    1. 82 FR 2284 - Exposure of Underground Miners to Diesel Exhaust
      GPO FDSys XML | Text
      DEPARTMENT OF LABOR, Mine Safety and Health Administration
      Request for information; reopening of the comment period.
      The comment period for the request for information, published on June 8, 2016 (81 FR 36826), and closed on November 30, 2016, (81 FR 58424) is reopened. Comments must be received on or before midnight Eastern Standard Time on January 9, 2018.
      30 CFR Parts 57, 70, 72, and 75

Title 30 published on 2015-10-21.

No entries appear in the Federal Register after this date, for 30 CFR Part 57.