R 408.42034 Material chutes and drops.

Rule 2034. (1) The area onto and through which material is to be dropped shall be completely enclosed with barricades not less than 42 inches high and not less than 6 feet back from the opening and the area receiving the material. Signs warning of the hazard of falling materials shall be posted on the barricades at each level containing the barricades. (2) Where material is dropped through more than 1 level, the opening shall be enclosed between the upper and lower levels, an enclosed chute shall be provided, or the intermediate levels shall be barricaded as prescribed in subrule (1) of this rule. If the drop is more than 40 feet inside the building, only an enclosed opening or chute shall be used. The chute or enclosure shall extend through the ceiling of the receiving level. (3) A material chute shall be constructed to withstand any impact load imposed on it without failure. (4) A material chute, or section thereof, at an angle of more than 45 degrees from the horizontal shall be entirely enclosed, except for an opening equipped with a closure at or about each floor level for insertion of materials. The opening shall not be more than 48 inches in height measured along the wall of the chute. At all stories below the top floor, the openings shall be kept closed when not in use. The chute shall fit the floor or wall opening or the open space shall be closed. (5) Where material is dumped from mechanical equipment or a wheelbarrow, a toeboard or bumper not less than 4 inches thick by 6 inches high nominal size secured to the floor shall be provided at each material chute opening.