['Specialized Industries']

['Mining']

07/19/2025

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§75.1431 Minimum rope strength.

...

§75.1431 Minimum rope strength.

RegSense CFR Regulations Mining Specialized Industries CFR Section English Focus Area USA

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

Minimum value=Weight of Ropex7.0

['Specialized Industries']

['Mining']

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