1910.184(c)(1) - Slings that are damaged or defective shall not be used.
1910.184(c)(2) - Slings shall not be shortened with knots or bolts or other makeshift devices.

1910.304(g)(5) - Grounding path. The path to ground from circuits, equipment, and enclosures shall be permanent, continuous, and effective.
NEC 610.61 - The trolley frame and bridge frame shall not be considered as electrically grounded through the bridge and trolley wheels and its respective tracks. A separate bonding conductor shall be provided.

1910.179(l)(3)(iii)(a) - Crane hooks showing defects described in paragraph (j)(2)(iii) of this section shall be discarded. Repairs by welding or reshaping are not generally recommended. If such repairs are attempted, they shall only be done under competent supervision and the hook shall be tested to the load requirements of paragraph (k)(2) of this section before further use.
1910.184(e)(9)(ii) - Slings shall be removed from service if hooks are cracked, have been opened more than 15 percent of the normal throat opening measured at the narrowest point or twisted more than 10 degrees from the plane of the unbent hook.

1910.184(c)(14) - Employers must not use slings without affixed and legible identification markings.
1910.179(b)(5) - Rated load marking. The rated load of the crane shall be plainly marked on each side of the crane, and if the crane has more than one hoisting unit, each hoist shall have its rated load marked on it or its load block and this marking shall be clearly legible from the ground or floor.

1910.179(g)(5)(iii) - On floor-operated cranes, a switch or circuit breaker of the enclosed type, with provision for locking in the open position, shall be provided in the leads from the runway conductors. This disconnect shall be mounted on the bridge or footwalk near the runway collectors.

1910.179(n)(2)(i) - The hoist chain or hoist rope shall be free from kinks or twists and shall not be wrapped around the load.
1910.179(j)(3)(viii) - Excessive wear of chain drive sprockets and excessive chain stretch.

1910.179(e)(2)(i)(a) - The bumpers shall have sufficient energy absorbing capacity to stop the crane when traveling at a speed of at least 40 percent of rated load speed.
1910.179(e)(3)(ii) - When more than one trolley is operated on the same bridge, each shall be equipped with bumpers or equivalent on their adjacent ends.