B 46
[Subsidiary]
CAP. 123] Building (Construction) Regulations [1985 Ed.
Cladding.
L. N. 294/76.
Party walls to be carried up to roof.
Timber not to be built into walls.
(4) In every panel wall constructed of reinforced concrete-
(a) the thickness shall be not less than 100 mm; and
(b) the volume of that reinforcement shall be not less than 0.4 per cent of the volume of the concrete in the wall and of that reinforcement shall be disposed vertically and half horizontally.
69. (1) Cladding shall-
(a) be constructed entirely of non-combustible materials, including the frames and sills of windows and doors;
(b) have its external face constructed of
(i) glass;
(ii) copper or aluminium alloy sheeting;
(iii) sheet iron or steel protected by vitreous enamel; or
(iv) such other materials as the Building Authority may approve.
(2) Cladding shall either--
(a) abut solidly against-
(i) the end of any wall partition or any column which forms part of an enclosure to a compartment of the building or which forms part of an enclosure to a staircase or other vertical shaft; and
(ii) any floor or beam; or
(b) have any voids in these positions filled with non-combustible material to the satisfaction of the Building Authority.
(3) Cladding shall be fixed to the main structure of the building at intervals not exceeding 3.5 m apart vertically and 1.5 m apart horizontally.
(4) The strength, stiffness, stability and durability of the cladding shall be to the satisfaction of the Building Authority.
(5) All fixings securing the cladding to the main structure shall be of stainless steel, phosphor bronze, aluminium bronze or other materials to the satisfaction of the Building Authority.
70. (1) Every party wall shall be carried up to the underside of the roof.
(2) Where the roof is constructed of combustible materials----
(a) no combustible part of such roof shall be carried across the party wall; and
(b) the roof covering shall be solidly bedded in mortar direct on the top of the party wall for its whole width and length.
71. No floor or roof joist bond timber or wood plate shall be built into the thickness of any wall.