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(a) Every rock crusher where an employee is required or permitted to be at, or near, an unguarded feed opening, shall be provided with adequate means whereby the power can be quickly disconnected in case of emergency. Such means of disconnecting the power shall be located at the crusher feed opening.
(b) A safe place shall be provided for employees at a crusher while cars or haulage vehicles are being unloaded.
(c) Adequate precautions shall be taken to prevent materials from being dumped into the crusher or crusher feeder while men are working therein.
(d) Employees working at a crusher shall be protected from falling into the crusher by one of the following means:
(1) By adequately guarding the crusher mouth.
(2) Use of a working platform located in such position that hung-up material in the crusher can be safely dislodged from the platform. The platform shall have a standard railing.
(3) When it is not practical to adequately guard the crusher mouth, a safety belt and life line shall be worn by employees working over the feed opening of an operating crusher. This life line shall be tied sufficiently short to prevent the wearer from getting into the crusher.
(4) By other equally safe means.
It is recommended that a wedge on a line, or hooks attached to an overhead hoist, be used to keep the crusher feed open.
(e) Before any repair work that may endanger the employee is started on a crusher, the prime mover shall be shut down, and where feasible rendered inoperable. A sign prohibiting starting shall be placed on the prime mover controls.
1. Renumbering from Section 6997 filed 1-12-73; effective thirtieth day thereafter (Register 73, No. 2).