1956-HKRS30-8-46_Part03 — Page 26

80

Thickness

of external and party walls of public buildings and

buildings of the ware-house

BUILDING (CONSTRUCTION) REGULATIONS, 1956

48. (1) Except as provided in regulation & every external and every party wali built of bricks or building blocks in a public building or a building of the warehouse class where the imposed floor load does not exceed 150 lbs. per square foot shall-

(4) be built in cement mortar or cement lime mortar con- taining not more than 6 volumes of sand to 1 volume of cement:

thy have a thickness at the top and for 16 feet below the top

of not less than 13 inches:

Provided that it may be not less than 83 inches for-

(1) a wall having only one storey height not exceeding 12 feet;

(ii) the topmost storey height of a wall where that wall does not exceed 24 feet in height.

(2) Every such wall being of the height and length specified in Table XI shall have a thickness at the base not less than that specified in that Table.

(3) The thickness of the intermediate parts of such wail between the base and 16 feet 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 16 feet below the top.

(4) Notwithstanding sub-regulation (1) (b) of this regulation, offsets shall not be made in a wall between the base and the tup thereof, except at the level of lateral supports.

TABLE XI.

Thickness of external and party walls of public buildinga and buildings of the warehouse class.

Height of wall

Not exceeding 21 feet

Exceeding 24 feet and not exceeding 36 feet

Exceeding 36 feet Not exceeding 48 feet

Thickness at base

Length of wall

Any length

13 Inthea

Not exceeding 36 feet Exceeding 35 feel

13 inches

171 inches

Not exceeding 35 feet Exceeding 35 feet

171 inches

211 Inches

BUILDING (CONSTRUCTION) REGULATIONS, 1986

31

47. (1) Every internal load bearing wall built of bricks or Thickness

of internal building blocks (not being a party wall) shall have a thickness load not less than half that required under regulation 45 or 46, as the boaring

walls. case may be, for an external or party wall of the same height but twice the length, and in any case not less than 81 inches.

walls.

(2) A non-load-bearing partition wall, adequately re- Partition strained laterally on all four edges may be of a thickness such that when 3 times its beight is added to its length the total does not exceed 200 times its thickness.

and

48. (1) (a) Notwithstanding the provisions of regulations Recesses

48, 46 and 47(1), openings and recesses may be formed in openings. walls to which the provisions of such regulations apply.

(b). No such recess shall reduce the width of any wall to less

than 8 inches.

(c) The aggregate width of all recesses and openings formed at any one level shall not exceed the length of the wa]] at that level.

(d) Where the wall is a buttressing wall, every recess or opening at any level shall be at a distance from the buttressed wall of not less than & the height of the buttressing wall.

(2) An arch or lintel sufficient to support the superstructure shall be built of incombustible material over every recess or opening in any wall.

(3) (a) Openings may be formed in party walls other than those separating parts of the building in different owner- ship.

(b) Such openings shall be fitted with self-closing doors in frames, the whole so constructed as to be fire resisting for at least half an hour.

(c) In any row of house or terrace exceeding zo feel in length or consisting of more than six houses or tenements, party walls without openings shall be provided at a distance apart not exceeding 120 feet, or six houses or tenements, whichever is the less.

(d) Where openings in party walls are closed, bricks or solid building blocks not less than 83 inches in thickness or reinforced concrete not less than 4 inches in thickness shall be used.