R 408.42407 Material handling.

Rule 2407. (1) The rope pulley shall be secured to the thrustout or hoisting jack in a manner to support not less than 3 times the weight to be lifted. The pulley groove shall be the same size as the rope. (2) Where a structural steel or wood beam thrustout is used, it shall be designed and installed in a manner to support not less than 3 times the weight being lifted and prevent tipping and twisting. A wood thrustout shall be set on edge. (3) Where a counterweight is used, it shall be contained or secured in place to prevent slippage. (4) Where a manual or powered hoisting jack is used, it shall be designed and installed in such a manner as to support not less than 3 times the load to be lifted. (5) An employee shall not stand or walk under material being hoisted.