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Subchapter 7. General Industry Safety Orders
Group 13. Cranes and Other Hoisting Equipment
Article 93. Boom--Type Mobile Cranes

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§4938. Truck Wedges or Jacks.

(a) Locomotive crane cars shall be provided with suitable removable wedges or jacks for transmitting loads from the crane body directly to the wheels without permitting the truck springs to function when handling heavy loads. These wedges shall be removed, or jacks released in a positive manner for traveling.

(b) Rail clamps, if used, shall have some slack between the point of attachment to the rail and the end fastened to the crane. Rail clamps shall not be used as a means of restraining tipping of a locomotive crane.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.


1. Amendment of subsection (a) and new subsection (b) filed 2-13-75; effective thirtieth day thereafter (Register 75, No. 7).

2. Amendment filed 8-29-86; effective thirtieth day thereafter (Register 86, No. 39).

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