Wooden or metal chutes used for the removal of material and debris from elevated levels of a building or other structure and which are at an angle of more than 45 degrees from the horizontal shall be entirely enclosed on all sides and the top, except for openings used for the receiving and discharging of material and debris. Such necessary openings shall not exceed 48 inches in height, measured along the wall of the chute, and all openings shall be covered when not in use. Chutes which are at an angle of 45 degrees or less from the horizontal may be open on the upper side.

Every chute more than 24 inches in maximum inside dimension shall be constructed of planking at least two inches thick full size, exterior grade plywood at least three-quarters inch thick or sheet metal at least three-sixteenths inch thick. Every chute shall have a metal bottom where the material or debris strikes the chute and every chute shall be rigidly supported throughout its height. A substantial gate shall be constructed and installed at the lower end of every loading chute to control the loading of material or debris into trucks and to cover the chute opening at all other times. Splash boards or baffles shall be installed on every chute to prevent materials or debris from rebounding onto the street, sidewalk shed or any other area adjacent to the discharge end of the chute.

A bumper or curb not less than four inches by four inches in section shall be provided at each chute opening where such opening is level with or below the level of the floor or platform. Every space between the chute and the edge of the opening in a floor or platform shall be solidly planked.

A sign reading, “DANGER”, shall be placed in a conspicuous location at the discharge end of every chute to warn persons employed in or lawfully frequenting the area of the chute of the potential overhead danger. Lettering on such signs shall be not less than six inches in height with letter strokes not less than three-quarters inch in width and shall be of such color as will contrast with the background.