(b) Hoisting ropes shall be of adequate size to handle the intended load and shall have the following safety factors:

Length of rope

Minimum safety factor of new rope

Minimum safety factor when rope must be discarded

500 feet or less

8

6.4

500 to 1000 feet

7

5.8

1000 to 2000 feet

6

5.0

2000 feet and more

5

4.3

(d) (19-128) No rope shall be used for hoisting or lowering men:

1. (1) If there are six broken wires in one strand of a rope lay.
2. (2) If the wires on the crown are worn to 65 percent of their original diameter.
3. (3) If more than 3 wires have been reduced by wear more than 30 percent in cross section are broken in 1 strand of a rope lay.
4. (4) If marked corrosion appears.
5. (5) If minimum safety factor falls below that specified in subsection (b) of this section.

(e) (19-120) At least once every three months, every hoisting rope used for hoisting or lowering men shall be carefully inspected by a competent man designated for that purpose:

1. (1) Carefully examining the exterior of the rope throughout its entire length.
2. (2) Cutting off a section from the load end of the rope at a point not less than 5 feet above the highest part of the rope connection to the conveyance.

Such inspection shall consist of:

(h) Serious damage may be caused to the hoisting rope by shaft accidents, such as pulling the shaft conveyance into the sheave, piling up rope on a stopped conveyance, or by kinking or running over the rope when the conveyance is derailed.

In event of an accident which may have caused damage to the hoisting rope, such rope shall not be used to hoist or lower men until it has been inspected by a competent man and found to be safe.