Administrative Code

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Virginia Administrative Code
Title 4. Conservation And Natural Resources
Agency 25. Department of Energy
Chapter 40. Safety and Health Regulations for Mineral Mining

4VAC25-40-4240. Installation of wire ropes.

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. Winding drum ropes (all constructions, including rotation resistant):

For rope lengths less than 3,000 feet:

Minimum Value = Static Load X (7.0 - 0.001L)

For rope lengths 3,000 feet or greater:

Minimum Value = Static Load X 4.0

2. Friction drum ropes:

For rope lengths less than 4,000 feet:

Minimum Value = Static Load X (7.0 - 0.0005L)

For rope lengths 4,000 feet or greater:

Minimum Value = Static Load X 5.0

3. Tail ropes (balance ropes):

Minimum Value = Weight of Rope X 7.0

Statutory Authority

§§ 45.1-161.3 and 45.1-161.294 and 45.1-161.305 of the Code of Virginia.

Historical Notes

Derived from VR480-05-1.2 § 15.148, eff. July 19, 1989; amended, Virginia Register Volume 25, Issue 20, eff. July 8, 2009.

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