(1) Occupancy-separation structures and tenancy-separation structures shall comply with the requirements of this section.

(2) Fire-resistance ratings. – All occupancy-separation structures shall be constructed of non-combustible material, and such occupancy-separation structures and all tenancy-separation structures shall have fire-resistance ratings of not less than the ratings specified in Table XI.

TABLE XI
FIRE_RESISTANCE RATINGS OF OCCUPANCY-SEPARATION STRUCTURES AND TENANCY-SEPARATION STRUCTURES

(3) Construction of occupancy-separation structures. – Every wall of an occupancy-separation structure shall extend from a foundation or floor of non-combustible construction to a ceiling or floor of non-combustible construction:

Provided that, where a ceiling is of combustible material, such wall shall extend through such ceiling to a non-combustible floor or roof construction and, where the roof is of combustible construction, such wall shall be carried through such roof to not less than 300 millimetres above the covering of such roof.

(4) Suspended floors in an occupancy-separation structure shall be continuous over the area of the occupancy-unit concerned, except for openings protected, as set out in subsection (6).

(5) Openings in occupancy-separation structure. – Every wall of an occupancy-separation structure shall have no openings other than doorways, and every such doorway shall be fitted with an approved self-closing fire-door having the appropriate fire-resistance rating set forth in Table XI

(6) Every opening in the floor of an occupancy-separation structure shall be protected by an enclosed shaft, and any opening in such shaft shall be fitted with an approved self-closing fire-door or shutter, and such shaft shall have a fire-resistance rating of on and a half hour, and such door or shutter shall have a fire-resistance rating of one hour.

(7) Penetration of occupancy-separation structure walls by combustible materials. – No combustible material shall pass through an occupancy-separation structure wall:

Provided that –

i) Rafters, joists, bearers and beams of combustible materials may be built into such wall, if the remaining thickness of the wall has the appropriate fire-rating set out in Table XI; and

ii) Light, combustible roof-members, such as battens and purlins, may be built into such wall, is such members are separated from one another by non-combustible material of not less than 75 millimetres in width and of depth of not less than the depth of such members.