Ariz. Admin. Code § R11-1-1108 - Use of Hoisting Rope, Tail Rope, Guide or Rubbing Rope on Friction Hoist
A. No hoisting
rope on a friction hoist shall be used in a shaft or winze of a mine where, in
any part of the rope:
1. The existing
strength has decreased to less than 90% of the original strength of the
rope.
2. The extension of a test
piece has decreased to less than 60% of its original extension when tested to
destruction.
3. The number of
broken wires in any section of the rope equalling the length of one lay of the
rope exceeds six.
4. Marked
corrosion occurs.
5. The rate of
stretch in a friction hoisting rope begins to show a rapid increase over the
normal stretch noted during its service.
B. No tail rope, guide or rubbing rope shall
be used in shaft where, in any part of the rope:
1. The existing strength has decreased to
less than 75% of the original strength of the rope.
2. The extension of a test piece has
decreased to less than 60% of its original extension when tested to
destruction.
3. The number of
broken wires in any section of the rope equalling the length of one lay exceeds
six.
4. Marked corrosion
occurs.
Notes
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