Openings into protected shafts

The external wall of a protected shaft does not normally need to have fire resistance. Situations where there are provisions are given in paragraph 3.63 (external walls of protected stairways, which may also be protected shafts) and paragraphs 15.8 to 15.11 (firefighting shafts).
Openings in other parts of the enclosure to a protected shaft should be limited to the following.
a. If a wall common to two or more buildings forms part of the enclosure, only the following openings should be made in that wall.
i. A fire doorset providing a means of escape, which has the same fire resistance as the wall and is fitted in accordance with the provisions in Appendix C.
ii. The passage of a pipe that meets the provisions in Section 9.
b. Other parts of the enclosure (other than an external wall) should only have openings for any of the following.
i. Fire doorsets of the appropriate fire resistance, fitted in accordance with the provisions in Appendix C.
ii. The passage of pipes which meet the provisions in Section 9.
iii. Inlets to, outlets from and openings for a ventilation duct (if the shaft contains or serves as a ventilating duct), meeting the provisions in Section 9.
iv. The passage of lift cables into a lift machine room (if the shaft contains a lift). If the machine room is at the bottom of the shaft, the openings should be as small as practicable.