Rule 2001. This part applies to power-driven cranes, classified as underhung, single-leg gantry, and jib, operating on the bottom flange of a track section and to single-track monorail systems. This part does not include monorail systems used only to transport personnel or to monorail-type conveyor systems commonly referred to as overhead trolley conveyors or power and free trolley conveyors. This part does not apply to a crane with a manually moved type bridge or trolley.
Mich. Admin. Code R. 408.12001