PART XXX SHAFTS, HOISTS AND CONVEYANCES — Content of certificate
616
(1) The data shown on the certificate issued by a professional engineer under section 615 shall be determined in accordance with the maximum material load on a shaft conveyance which shall not exceed the lesser of
616(a)
the maximum allowable suspended load for the hoist, less the sum of the weight of the hoisting ropes, the weight of tail ropes, and the weight of the conveyances and attachments;
616(b)
the breaking strength of the rope, divided by the required factor of safety, minus the maximum weight of rope suspended in one compartment, minus the weight of the conveyance and attachments in the compartment, but where multiple ropes are used, the lowest breaking strength of a rope is used for all ropes in load calculations; and
616(c)
the maximum allowable load for which the conveyance is rated by the manufacturer.
616(2)
The unbalanced load on the hoist as rated by the manufacturer or as certified by a professional engineer competent in the design of mine hoisting plants shall not be exceeded.
616(3)
For the purpose of this section, the factor of safety of a rope, when new, means the number of times the breaking strength of the rope is greater than the total weight supported by the rope at a definite place in the rope and the breaking strength of a rope means the breaking strength of the rope as shown in the manufacturer's certificate.
Not legal advice. Verify the cited article against the signed agreement.