Section R11-1-1155. Static-load safety factors for selecting ropes for hoisting men

Length of rope in shaft feet	Minimum factor of safety (new rope)	Minimum factor of safety (remove)
500 or less	8	6.4
501 - 1,000	7	5.8
1,001 - 2,000	6	5.0
2,001 - 3,000	5	4.3
3,001 - or more	4	3.6

  

 

The following static-load safety factors shall be used for selecting ropes to be used for hoisting men and for determining when such ropes shall be removed from man hoists:

4.        For all ropes less than three-quarter inch in diameter, at least four clips or equivalent shall be used.

5.        When special conditions require the attachment of a sling to the hoisting cable to handle equipment in the shaft, the sling shall be attached by clips or equivalent in accor- dance with the table in subsection (3) of this standard.

Historical Note

Former Rule 11:56.