§ 39.28. Cranes.
(a) Employes should keep from under a load being swung, hoisted, lowered, or backed up. No person should ride on top of a crane bridge or carriage or on the load. A craneman should not move cranes with chains swinging full length, or while hookmen or others are in the way. The crane cable should not be held above the sheave block, as the fingers of the holder may be drawn into the block.
(b) The limit switch should not be depended on to stop the motor; the motor should be under control at all times. All controllers should be in the ‘‘off’’ position before opening or closing the main switch. If the power goes off, the controllers should be moved to the ‘‘off’’ position. When leaving the cab, an operator should throw the controllers to the ‘‘off’’ position and open the main switch.
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