GroundRules
4VAC25-40-4360: Diameter specifications
Where this section sits in the code
- Title 4. Conservation And Natural Resources
- Agency 25. Department of Energy
- Chapter 40. Safety and Health Regulations for Mineral Mining
- Part XV. Safety and Health Regulations—Underground Only
- Article 10. Personnel Hoisting
Diameters of head sheaves and hoist drums shall conform to the following specifications:
Rope construction
Diameter of sheave and drum
Recommended
Times rope diameter
Minimum
Times rope diameter
6 x 7 classification
72
42
6 x 19
45
30
6 x 37
20
18
6 x 25 type B, flattened strand
45
30
6 x 27 type H, flattened strand
45
30
6 x 30 type G, flattened strand
45
30
18 x 7 classification
51
34
Collected 2026-09-14T04:46:08Z. Source file · JSON