3306.9.12.1 Floor openings used for the removal of debris.
BC § 3306.9.12.1
Every opening in a floor used for the removal of debris shall be tightly enclosed with a shaftway, extending from floor to floor, with such shaftway enclosed with: 1. Planking not less than 2 inches (51 mm) in thickness, or equivalent solid material; or 2. Where the opening is used for the removal of noncombustible material, wire mesh may be utilized in lieu of planking, provided such mesh is not less than number 18 gauge wire mesh, with openings in the wire no larger than 1/2 inch (13 mm), and also provided that the wire mesh is securely attached, in accordance with drawings developed by a registered design professional, to the shaftway so that the wire mesh enclosure in any location does not deflect more than 2 inches (51 mm) when a force of at least 200 pounds (890 n) is applied along any horizontal portion of such wire mesh enclosure. Exceptions: 1. In buildings not more than six stories or 75 feet (22 860 mm) in height, whichever is less, a shaftway is not required. Instead openings in the floor shall be clearly marked and solidly planked over while not in use by planking not less than 2 inches (51 mm) in thickness, or equivalent solid material, and laid close.
2.A shaftway is not required at the working deck. Instead, openings in the working deck shall be clearly marked and solidly planked over while not in use by planking not less than 2 inches (51 mm) in thickness, or equivalent solid material, laid close.
