Mich. Admin. Code R. 408.11716

Current through Vol. 24-21, December 1, 2024

Section R. 408.11716 - Hoisting cables and chains

Rule 1716.

(1) A chain and its component parts, other than alloy steel chain having a minimum tensile strength of 125,000 pounds per square inch, shall have a designed safety factor of not less than 5. Alloy chain shall not be used in excess of the working load in straight tension for its size as prescribed in table 1.

(2) A hoist cable and its component parts for mobile refuse packer units shall have a designed safety factor of not less than 2 based on the applied pull.

(3) A hoist cable shall be inspected on installation and monthly thereafter.

(4) A hoist cable shall not be used if, in any length equal to 8 diameters of the cable, the total number of visible broken wires exceeds 10% of the total number of wires, or if the cable shows other signs of excessive wear, corrosion, kinks or bird caging.

(5) Where a "U" type cable clamp or clip is applied, it shall comply with table 2.

(6) The hydraulic relief valve in a cable operating system shall be set at the manufacturer's rating and sealed.

(7) A hoist cable bent to form an eye shall be equipped with a metal thimble.

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Note: There is only one correct method of installing wire rope clips. They should be attached to rope ends as shown in photograph above. The base of each clip should bear against the live, or long rope end, and the U-bolt should bear against the dead or short rope end.

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Mich. Admin. Code R. 408.11716

1979 AC