56 Ill. Adm. Code 6000.260
Chain
Section 6000
Section 6000.260 Chain
a) Twisted wire or stamped chain is not permitted.
b) Chains with manufacturers certified load carrying capacities
must be utilized for safety devices and stress bearing applications.
c) Any of the following shall be cause for chain replacement:
1) A 10% reduction in material diameter at the worn portion of
the link;
2) A twisted or disfigured link;
3) Physical deterioration of a link by strain, usage, rust or
corrosion;
4) Used for a purpose other than that for which the manufacturer
recommended; or
5) Used to carry a load in excess of the manufacturer's working
load limit.
d) Cold Shuts, "S" hooks, repair and lap links, and
other hardware grade attachments must be welded shut if used to support
passengers.