Mich. Admin. Code R. 408.41237 - Boatswains chair
Rule 1237.
(1)
Two 5/8-inch, first-quality manila rope slings or synthetic rope of equivalent
strength shall be reeved through the 4 seat holes so as to cross each other on
the underside. Where an employee is using a heat or spark-producing process,
such as gas welding or cutting, a protected 3/8-inch wire rope shall be used in
place of fiber rope.
(2) The tackle
shall consist of bearing or bushed blocks and 5/8-inch, first grade manila rope
or its equivalent. The block shall be secured to roof irons, hooks, or other
objects that are secured. Tiebacks shall be installed at right angles to the
face of the building and shall be secured to the roof hooks and the
building.
Notes
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