FAQ >> Rule about marking rated capacity of crane

Rule about marking rated capacity of crane

(1) The rated capacity of a crane shall be legibly marked on each side of the crane. Markings shall be legible from the ground or floor. Each load block of the hoisting units of the crane shall be legibly marked with its individual rated capacity.

(2) Each crane designed and manufactured after January 1, 1971 shall have a service class rating as prescribed in “CMAA #70--Specifications for Top Running Bridge and Gantry Type Multiple Girder Electric Overhead Traveling Cranes,” 1970 edition, as shown in Appendix B. Additionally the service class rating shall be legibly marked on each crane.

(3) Clearance from obstructions shall be a minimum of 3 inches overhead and 2 inches laterally between the crane and any obstruction.

(4) Runways of parallel cranes that do not have an intervening wall or structure shall have adequate clearance between the 2 bridges.

(5) The cab of a crane shall be located to afford a minimum of 3 inches clearance from all fixed structures within its area of possible movement.

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