1964_BUILDING_(CONSTRUCTION)_REGULATIONS — Page 26

B 26

CAP. 123]

Building (Construction) Regulations

[1985 Ed.

[Subsidiary]

Foundations.

Construction of foundations.

L.N. 294/76.

Site investigation.

PART IV

FOUNDATIONS

28. The foundations of every building shall be designed and constructed so as to be capable of sustaining and transmitting safely all the dead and imposed loads to the ground without impairing the stability of that or of any other building, street, hillside or slope, nullah or service.

29. Foundations shall be-

(a) constructed of plain or reinforced concrete; and

(b) at a depth below the surface of the ground sufficient to-

(i) secure adequate bearing capacity of the ground; (ii) avoid interference with drains, nullahs, sewers or other services in adjacent streets, roads or lanes;

(iii) avoid overloading the foundations of adjacent buildings or the ground supporting such foundations; and (iv) avoid/creating unstable conditions in hillsides or slopes;

(c) of such thinkness, not being less than 150 mm, and of such width as may be necessary to comply with the provisions of regulations 5 and 6:

Provided that where the foundation rests on sound hard rock the thickness of concrete need be no more than is necessary to provide a suitable level surface on which to construct the building; and

(d) symmetrically under the centre of action of the load:

Provided that where the foundation is subjected to bending moment or eccentric loading, it shall be so designed, as to comply with regulations 5 and 33.

30. (1) Where foundations are proposed to be constructed an investigation of the site shall be undertaken to establish, to the satisfaction of the Building Authority, the type and character of the ground on which the foundations are to be placed.

(2) Where the initial investigation does not established beyond doubt that the ground is in all respects suitable for the purpose of supporting the foundations without the risk of undue settlement instability, further tests must be undertaken appropriate to the ground conditions and the size and complexity of the building works and to the satisfaction of the Building Authority.

(3) Soil tests carried out under paragraph (2) shall be con- ducted in accordance with the relevant provisions of C.P.: 2001 (1957), Site Investigation.

(4) In all cases the data obtained from adjoining sites may be used in support of the investigation undertaken.