Mich. Admin. Code R. 408.10582 - Suspension wire rope maintenance; inspection and replacement
Rule 582.
(1)
Any of the following conditions or combination of conditions are be cause for
removal of the wire rope:
(a) In any length of
8 diameters, the total number of visible broken wires is more than 6 in 1 rope
lay or 3 wires in 1 strand.
(b) The
wire rope has been kinked, crushed, or bird-caged or has sustained any other
damage that distorts the wire rope structure.
(c) The wire rope shows heat or corrosive
damage.
(d) The wire rope contains a
broken wire within 18 inches (460.8 mm) of the end
attachment.
(2) Wire rope
that is bent to form an eye over a bolt or rod that has a diameter that is less
than 4 times the rope diameter shall be equipped with a metal
thimble.
(3) End fittings should be
swagged or zinc-poured sockets.
(4)
Where wire clips are used, the provisions of table 8 shall be followed and the
u-bolts shall be installed on the dead end or short end of the wire
rope.
(5) Wire rope shall be stored
in a manner to prevent damage or deterioration.
(6) Before cutting wire rope, a seizing shall
be placed on each side of the cut on preformed wire rope, 2 seizings shall be
placed on each side of 7/8 inch size or smaller nonpreformed wire rope, and 3
seizings shall be placed on each side of 1 inch or larger size nonpreformed
wire rope.
(7) Wire rope shall be
maintained in a lubricated condition over its entire length with the same type
of lubricant that is used by the manufacturer.
(8) Suspension wire ropes shall be maintained
and used in accordance with the procedures recommended by the wire rope
manufacturer.
(9) Suspension wire
rope shall be inspected by a competent person for visible defects and gross
damage to the rope before every use and after each occurrence that might affect
the wire rope's integrity.
(10) A
thorough inspection of suspension wire ropes in service shall be made once a
month. Suspension wire ropes that have been inactive for 30 days or more shall
have a thorough inspection before they are placed into service. These thorough
inspections of suspension wire ropes shall be performed by a competent
person.
(11) The need for
replacement of suspension wire rope shall be based on its condition. A wire
rope shall be removed for any of the following conditions:
(a) Evidence of core failure. A lengthening
of rope lay, protrusion of the rope core, and a reduction in rope diameter
suggests core failure.
(b) Outer
wire wear is more than 1/3 of the original outer wire diameter.
(c) Any other condition that the competent
person determines has significantly affected the integrity of the
rope.
(12) The owner
shall keep a certification record of each monthly inspection of a suspension
wire rope which shall be verified by the employer. The record shall include the
date of the inspection and a number or other identifier of the wire rope that
was inspected. The record of inspection shall be made available for review by
the director of the Michigan Department of Licensing and Regulatory Affairs or
his or her designated representative and by the employer.
Notes
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