(1) Fire-stopping to the extent specified in this section shall be carried out with non-combustible material:

Provided that, in the case of walls and partitions of timber-frame construction, timber of not less than 38 millimetres in thickness may be used in fire-stops.

(2) Spaces in fire-resistant protective coverings. –

Any spaces between the fire-resistant protective covering and columns or other structural members shall be fire-stopped at each storey level, and the fire-stops shall extend for the thickness of the floor of such storey.

(3) Spaces in wood-floor construction. – Where joists or bearers are parallel to, and are 75 millimetres or less from a wall or chimney, the space between the joists or bearer and the wall or chimney shall be fire-stopped to the depth of the joists or bearer.

(4) Spaces between walls and wall-linings. – In buildings of grade A construction, spaces between walls and wall-linings or panelling shall be completely fire-stopped.

(5) In buildings, other than buildings of grade A construction, such spaces shall be fire-stopped at each floor and ceiling-level.

(6) Spaces in chases and recesses. – Where chases or recesses pass from one storey to another, such chases or recesses shall be fire-stopped at each storey-level, and the fire-stops shall extend for the thickness of the floor of such storey.

(7) Spaces around pipes and ducts. – All spaces around pipes or ducts in every storey shall be fire-stopped at each floor, ceiling or wall of such storey.

(8) Walls and partitions of stud-framing. – All walls and partitions of stud-framing shall be fire -stopped at the floors and ceilings of every storey.