R 408.41261
R 408.41261 Wire rope.
Cite as Mich. Admin. Code R 408.41261
Rule 1261. (1) A wire rope shall be inspected for defects by a competent person
before each work shift and after every occurrence that could affect a rope’s integrity. A
rope shall be replaced if any of the following conditions exist:
(a) Physical damage that impairs the function and strength of the rope.
(b) Kinks that might impair the tracking or wrapping of rope around the drum or
sheaves.
(c) Six randomly distributed broken wires in 1 rope lay or 3 broken wires in 1 strand
in 1 rope lay.
(d) Abrasion, corrosion, scrubbing, flattening, or peening that has caused the loss of
more than 1/3 of the original diameter of the outside wires.
(e) Heat damage caused by a torch or any damage caused by contact with electrical
wires.
(f) Evidence that the secondary brake has been activated during an overspeed
condition and has engaged the suspension rope.
(2) Wire rope that is bent to form an eye over a bolt or rod which has a diameter of
less than 4 times the rope diameter shall be equipped with a metal thimble.
(3) Swaged attachments or spliced eyes on wire suspension ropes shall not be used
unless they are made by the wire rope manufacturer or a qualified person.
(4) If wire rope clips are used on suspension scaffolds, then all of the following
provisions apply:
(a) Clips shall be installed according to the manufacturer’s recommendations.
(b) Clips shall be retightened to the manufacturer’s recommendations after the initial
loading.
(c) Clips shall be inspected and retightened to the manufacturer’s recommendations
at the start of each work shift.
(d) U-bolt clips shall not be used at the point of suspension for any scaffold hoist.
(e) If U-bolt clips are used, then the U-bolt shall be placed over the dead end of the
rope and the saddle shall be placed over the live end of the rope.
(5) Wire rope shall not come in contact with sharp edges.