Protected shafts between compartments

A protected shaft should only be used to accommodate stairs, lifts, escalators, chutes, ducts, pipes, sanitary accommodation and washrooms. Where a protected shaft contains a protected stairway, Section 2 imposes additional requirements (see paragraphs 2.69 to 2.73) and where it contains a firefighting stairway Section 6 imposes additional requirements (see paragraphs 6.3 to 6.6). The construction enclosing a protected shaft, other than a wall which is part of an external wall, should – (a) form a complete barrier to fire between the different compartments which the shaft connects; (b) have the same fire resistance as the compartment through which it is passing, other than where a glazed screen complying with paragraph 4.26 is provided; and (c) satisfy the provisions regarding ventilation in paragraph 4.27 and regarding the treatment of openings in paragraph 4.28.