Mich. Admin. Code R. 408.11824

Current through Vol. 24-22, December 15, 2024

Section R. 408.11824 - Wire rope

Rule 1824.

(1) A wire rope used on a crane shall be repaired or replaced in any of the following circumstances:

(a) One third or more of the original diameter of the outside individual wires is worn.

(b) There is kinking, crushing, bird-caging, or any other damage that results in distortion of the running portion of the wire rope structure.

(c) The wire rope shows heat or corrosive damage.

(d) In running ropes, there are 6 randomly distributed broken wires in 1 lay or 3 broken wires on 1 strand in 1 lay. In rotation-resistant ropes, 2 randomly distributed broken wires in 6 rope diameters or 4 randomly distributed broken wires in 30 rope diameters.

(e) There are reductions from nominal diameter of more than the following:

(i) One sixty-fourth of an inch for a diameter to and including 5/16 of an inch.

(ii) One thirty-second of an inch for a diameter 3/8 of an inch to and including 1/2 of an inch.

(iii) Three sixty-fourths of an inch for a diameter 9/16 of an inch to and including 3/4 of an inch.

(iv) One sixteenth of an inch for a diameter 7/8 of an inch to and including 1 1/8 inches.

(v) Three thirty-seconds of an inch for a diameter 1 1/4 inches to and including 1 1/2 inches.

(f) In standing ropes, there are more than 2 broken wires in 1 lay in sections beyond end connections or more than 1 broken wire at an end connection.

(2) Wire rope discarded from a crane under subrule (1) of this rule shall not be used for any other load-carrying service.

(3) Wire rope for a crane bent to form an eye shall be equipped with a metal thimble.

(4) A wire rope end fitting shall be a clamp, swage, or a zinc or equivalent poured socket. Before cutting wire rope, seizings shall be placed as follows:

(a) One seizing on each side of the cut on preformed wire rope;

(b) Two seizings on each side of 7/8 inch size or smaller nonpreformed wire rope.

(c) Three seizings on each side of 1 inch or larger size nonpreformed wire rope.

(5) Wire rope that has an independent wire rope core shall be used on all molten metal applications and in an area where the environmental atmosphere will cause deterioration of a hemp center.

(6) Wire rope shall be stored in a manner to prevent damage or deterioration.

(7) The unreeling or uncoiling of wire rope shall be done as recommended by the rope manufacturer and with care to avoid kinking or inducing a twist.

(8) Rope clips attached with u-bolts shall have the u-bolts on the dead or short end of the rope. Spacing and number of all types of clips shall be in accordance with the clip manufacturer's recommendation. Clips shall be drop-forged steel in all sizes manufactured commercially. When a newly installed rope has been in operation for an hour, all nuts on the clip bolts shall be retightened. See Appendix A.

(9) Replacement rope shall meet or exceed the original specifications set forth by the crane manufacturer.

(10) If a load is supported by more than 1 part of rope, then the tension in the parts shall be equalized.

Mich. Admin. Code R. 408.11824

1979 AC; 2002 AACS; 2018 MR 3, Eff. 2/8/2018