- A. Hoisting rope installed on a friction hoist shall have a factor of safety of not less than that determined from the following formula: F. of S. = 8.0 - .0005d, where “d” is the maximum length of rope suspended below the head sheave in feet.
- B. For friction hoists, the factor of safety in the hoisting ropes shall be not less than 5.5 for any depth of shaft when the ropes are installed.
- C. The factor of safety of tail ropes shall be not less than 7 when installed.
- D. The factor of safety of guide and rubbing ropes shall be not less than 5 when installed.
Historical Note
Adopted effective April 7, 1976 (Supp. 76-2).