A builder or plumber using a chute which projects over a street or public place shall comply with the following requirements—

a) The vertical height of the chute shall not exceed 6 meters, and the inclination to the horizontal shall not exceed 45 degrees;

b) The chute shall be entirely enclosed, except at the inlet or outlet openings;

Provided that intermediate openings may be formed in the side of a chute, but such openings shall be kept closed when the chute is in use;

c) If an inside dimension of the cross-section exceeds 600 millimeters, the chute shall be constructed of planking of not less than 38 millimeters in thickness or of sheet metal of not less than 3.1 millimeters in thickness, and shall be rigidly supported throughout its height;

d) Baffles or a container shall be provided at the outlet to prevent materials rebounding.