(c) It has external abrasions, cuts, or broken fibers, decay, burns, softness,
or variation in size or roundness.
(d) It has internal presence of grit, broken fibers, mildew or mold, color change,
powdering, or loose fibers.
(8) Natural or synthetic rope shall not be used if there is exposure to corrosive
substances, chemicals, or heat.
History: 1979 AC; 2004 AACS.
R 408.40836 Hooks, shackles, and other accessories.
Rule 836. (1) A hook, ring, oblong link, pear-shaped link, welded or mechanical
coupling link, or other attachment, when used with alloy steel chain, shall have a rated
capacity equal to the chain or rope to which it is attached, and the load shall not exceed
the rated load. Shackles and other accessories shall have a rated capacity equal to or
greater than the load to which it is attached.
(2) A hook shall be discarded if either of the following applies:
(a) The throat opening is more than 15% greater than the manufactured size.
(b) The hook has more than 10 degrees twist from a vertical center line drawn through the
hook center.
(3) Special custom designed grabs, hooks, clamps, and other lifting accessories, for such
units as modular panels, prefabricated structures and similar materials, shall be marked to
indicate the safe working loads and shall be proof tested to 125% of their rated load.
(4) A job or shop hook and link, or a makeshift fastener, formed from a bolt, rod, or other
such accessories, shall not be used, unless tested in accordance to subrule (3) of this rule.
(5) A shackle and connecting pin, and other accessories, shall be discarded if the diameter
is reduced by more than 10%.
History: 1979 AC; 1983 AACS; 2004 AACS; 2013 AACS.
Editor's Note: An obvious error in R 408.40836 was corrected at the request of the promulgating
agency, pursuant to Section 56 of 1969 PA 306, as amended by 2000 PA 262, MCL 24.256. The rule
containing the error was published in Michigan Register, 2013 MR 7. The memorandum requesting the
correction was published in Michigan Register, 2013 MR 21.
R 408.40837 Chains.
Rule 837. (1) Chains used for material handling shall be made of alloy steel.
(2) A welded alloy steel chain shall have a permanently affixed tag showing the size,
grade, rated capacity, and manufacturer's name.
(3) If wear at any point of any chain link is more than that shown in table 2, then the
chain shall be repaired or replaced. The repair shall return the chain to its rated capacity.
(4) Employers shall not use alloy steel-chain slings with loads in excess of the rated
capacities, such as working load limits, indicated on the sling by permanently affixed and
legible identification markings prescribed by the manufacturer.
TABLE 2
MAXIMUM ALLOWABLE WEAR AT ANY POINT
OF LINK
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