B 38
[Subsidiary]
L.N. 294/76.
CAP. 123] Building (Construction) Regulations
[1985 Ed.
(b) have a thickness at the top and for 5 m below the top of not less than 340 mm:
Provided that it may be not less than 225 mm for-
(i) a wall having 1 storey height not exceeding 3.5 m;
(ii) the topmost storey height of a wall where that wall does not exceed 7 m in height.
(2) Every such wall being of the height and length specified in Table XII shall have a thickness at the base not less than that specified in that Table.
(3) The thickness of the intermediate parts of such wall between the base and 5 m below the top shall be of not less thickness than that obtained if the wall were to be built solid throughout the space between straight lines drawn on each side of the wall and joining the thickness at the base to the thickness at 5 m below the top.
(4) Notwithstanding paragraph (1)(b), offsets shall not be made in a wall between the base and the top thereof, except at the level of lateral supports.
L.N. 294/76.
TABLE XII
Thickness of external and party walls of public buildings and buildings of the warehouse class
Height of wall Length of wall Thickness at base Not exceeding 7 m Any length 340 mm Exceeding 7 m and not exceeding 11 m Not exceeding 11 m 340 mm Exceeding 11 m 460 mm Exceeding 11 m Not exceeding 15 m Not exceeding 11 m 460 mm Exceeding 11 m 575 mmThickness of internal load bearing walls.
L.N. 294/76.
Recesses and openings.
54. (1) Every internal load bearing wall built of bricks or building blocks (not being a party wall) shall have a thickness not less than that required under regulation 52 or 53, as the case may be, for an external or party wall of the same height but 2 times the length, and in any case not less than 225 mm.
(2) A non-load-bearing partition wall, adequately restrained laterally on all 4 edges may be of a thickness such that when 3 times its height is added to its length the total does not exceed 200 times its thickness.
55. (1) (a) Notwithstanding the provisions of regulations 52, 53 and 54(1), openings and recesses may be formed in walls to which the provisions of such regulations apply.