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Code of Federal Regulations Title 30. Mineral Resources § 30.56.19021 Minimum rope strength

Current as of January 02, 2025 | Updated by Findlaw Staff

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

Loadx(7.0–0.001L)

For rope lengths 3,000 feet or greater:

Minimum Value=Static Loadx4.0

(b) Friction drum ropes.

For rope lengths less than 4,000 feet:

Minimum Value=Static

Loadx(7.0–0.0005L)

For rope lengths 4,000 feet or greater:

Minimum Value=Static Loadx5.0

(c) Tail ropes (balance ropes).

Minimum Value=Weight of Ropex7.0

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Cite this article: FindLaw.com - Code of Federal Regulations Title 30. Mineral Resources § 30.56.19021 Minimum rope strength - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-30-mineral-resources/cfr-sect-30-56-19021/

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