1956-HKRS30-8-46_Part03 — Page 23

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Pressure from adjacent ground.

Footings.

Covering of aiter.

BUILDING (CONSTRUCTION) REGULATIONS, 1956

31. Where the ground adjacent to any building exerts pres- stre upon or causes the application of load to any part of that building, such building shall be constructed so as to be capable of sustaining safely and transmitting that pressure or load with- out exceeding the appropriate limitations of permissible stresses.

32. Where footings are required to spread loads from walls to foundations, the bricks or building blocks below the base of such walls shall increase downwards by wgular offsets not exceed- ing one half the thickness of the brick or building block on one or both sides of such walls. Such bricks or building blocks shall where possible be laid as headers.

PART V.

Sites and floors.

33. (1) The ground surface within the external walls of every building shall be covered with a layer of concrete, not inferior to that designated Grade V concrete in regulation 19, finished smooth on the upper surface. Such concrete shall have a thickness of

(2) not less than 6 inches of Grade V concrete where the

concrete is laid on ground;

(b) not less than 4 inches where it is-

(1) not inferior to Grade V concrete and is laid on a consolidated bed consisting of clinker, broken bricks or other similar materials not less than 3 inches thick; or

(ii) not inferior to Grade 11 concrete; or (iii) reinforced to comply with regulation 5.

(2) Sub-regulation (1) shall not apply to any building (or part of a building) which is—

(a) to be used solely-

(i) as a foundry or blacksmith's shop;

(ii) for the milling or storage of timber;

(iii) for the storage of acids and chemicals which destroy concrete;

BUILDING (CONSTRUCTION) REGULATIONS, 1956

(b) of one storey—

(1) open on two or more sidus; or

(ii) intended to be used solely for the storage of builder's materials or plant; or

(iii) intended to be used solely as a greenhouse, or tool shed and does not communicate by any door, window or other opening with any building to which sub-regulation (1) applies.

(3) Where in any part of a building the layer of concrete required by sub-regulation (1) is also a floor of the building, that layer shall be constructed of concrete not inferior to Grade 111, nol less than 4 inches thick, and laid on a consolidated bed not less than 3 inches thick constructed of clinker, broken bricks, or other similar materials.

(4) Where in any part of a building the floor next above the ground is constructed of plain or reinforced concrete, constructed so as to leave between it and the ground an air space, ventilated in accordance with sub-regulation (5) and enclosed so as to prevent its use for any other purpose, such four may be deemed to be the layer of concrete required by sub-regulation (1).

(s) (a) An enclosed space under a floor shall be ventilated on at least two sides with air-bricks or otherwise, having an open area of not less than the equivalent of a square inches per linear foot run of external wall. No single opening in any such air brick or ventilator shall exceed † inch in its least dimension.

(b) Where the flow of air may be obstructed in places by solid construction, ducts of a total area equal to not less than twice the total area of the opening in the air bricks or other ventilator in the external walls shall be formed in such solid construction.

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34. (1) The ground surface of every area, back yard or alley- Areas, etc. way of every building (unless exempted as a garden) shall be to be covered with—–

(4) a layer of concrete not less than 4 inches thick and not

inferior to Grade V:

(b) stone or brick paving bedded and jointed in cement

mortar;

paved.