34
Glasg
block walls.
Parapet walls.
Boundary Malia
and fences.
BUILDING (CONSTRUCTION) REGULATIONS, 1956
(6) Such ties shall also be placed at distances apart not exceeding 12 inches (measured vertically) within 6 inches of the sides of all openinga.
(7) The cavity shall during construction be kept free from mortar droppings.
(8) In the case of load-bearing walls the cavity shall extend downwards at least 6 inches below the level of the lower damp. proof course of the wall, and in all walls, wherever the cavity is bridged a damp-proof course or flashing shall be provided to direct moisture away from the inner leaf of the wall,
(9) Adequate drainage shall be provided to all cavities through the outer leaf of the wall. The maximum width of any opening for drainage purposes shall not exceed 3 inch.
54. Where glass block panels are built into walls other than party walls-
(a) the opening into which the glass blocks are built shall be so constructed that no load from the building is transferred to the glass blocks;
(b) the maximum area of a single panel shall be too square feet and the maximum vertical dimension shall be 15 feet in external walls or ao feet in internal walls.
55. Every parapet to an external or party wall shall-
(a) where built of bricks or building blocks have-
() a thickness of not less than 8 inches; and (ii) a height not more than 6 times its thickness;
(b) where built of reinforced concrete have a thickness of
not less than 4 inches.
56.) The boundary round the site of any building adjacent to a street or scavenging lane shall be provided with a boundary wall or fence not less than 6 feet in height unless exempted by the Building Authority.
(2) Every boundary wall of bricks or building blocks shall-
(a) be built in cement mortar or cement lime mortar;
BUILDING (CONSTRUCTION) REGULATIONS, 1966
(b) be not less than 4 inches thick if not exceeding 8 feet
in height, built solid or honeycombed; and
(c) be provided with buttresses or piers not less than 8
inches square in horizontal section and not more than 12 feet apart centre to centre which shall be placed-
(i) at all angles of such wall; and
(ii) at each end thereof unless such wall is bonded into another wall not less in thickness than the buttresses or piers required;
(d) be not less than 8 inches thick if exceeding 8 feet in
height.
35
57. (a) The slenderness ratio of any wall or pier of any Definition
storey-height shall be-
(i) in the case of a wall, the ratio of the effective beight to the thickness of the wall, exclusive of plaster or rendering.
(ii) in the case of a pier, the ratio of the effective height to the least lateral dimension.
(b) The effective height of a storey-height of a wall or pier
shall be as shown in column z below-
Effective Height,
Support to Wall or Pier.
(i) Wall with lateral support at the top of that storey height.
of the storey height.
(ii) Wall without lateral sup- times the storey height.
port at the top of that storey height.
(iii) Pier with fateral support al
the top of that storey height.
The storey height.
(iv) Pier without lateral sup. Twice the storey height,
port at the top of that storey height.
of alender.
ness ratio.