Openings in compartment walls and floors

A compartment wall (other than one described in paragraph 4.22) and a compartment floor should have no openings other than those – (a) having a fire-resisting self-closing door (see paragraph 4.29 to 4.35); (b) for the passage of pipes, ventilation ducts, chimneys, appliance ventilation duct or duct encasing one or more flue pipes – when the opening in the compartment wall or compartment floor should comply with paragraphs 4.43 to 4.47; (c) for a waste chute system constructed of non-combustible materials; (d) for an atrium designed in accordance with the relevant recommendations of BS 9999 BS 5588-7; and (e) for a protected shaft which complies with the provisions of paragraph 4.25 to 4.28.