1964_BUILDING_(CONSTRUCTION)_REGULATIONS — Page 36

B 36

[Subsidiary]

CAP. 123] Building (Construction) Regulations

(a) regulations 71 and 72; and

[1985 Ed.

L.N. 294/76.

Rules for measuring height of storeys and height of walls,

L.N. 294/76.

Rules for measuring length of walls.

(b) (i) regulations 50 to 63; or

(ii) regulations 64 to 67.

(2) In the case of a building where the imposed floor load exceeds 7.5 kPa, the load bearing walls shall be designed and constructed in accordance with regulation 129.

50. (1) For the purposes of regulations 52 and 53, the height of the lowest or only storey shall be measured from the base of the wall, and the height of any other storey shall be measured from the level of the underside of the floor structure of the storey to the level of the underside of the floor structure next above it or, if there is no such storey, then to the highest part of the wall or, in a storey comprising a gable to the height of the gable.

(2) The height of a party wall comprising a gable shall be measured from its base to the base of the gable; the height of any other wall comprising a gable shall be measured from its base to the height of the gable; and the height of any wall not comprising a gable shall be measured from its base to its highest part excluding any parapet which does not exceed 1200 mm in height.

51. (1) For the purposes of regulations 52 and 53, walls shall be deemed to be divided into distinct lengths by piers, buttresses, chimneys or dividing walls. Such piers, buttresses, chimneys or dividing walls shall be bonded into the walls, and---

(a) in the case of a pier or buttress shall----

(i) extend upwards from the base of the wall to the top of the wall;

(ii) be, at any height, not less in thickness (measured so as to include the wall) than 3 times the thickness of the wall; and

(iii) be not less in breadth than 2 times the thickness of the wall;

(b) in the case of a chimney shall have a horizontal sectional area, excluding any fireplace opening or flue, of not less than the area required for a pier or buttress and an overall thickness of not less than 3 times the thickness of the wall it is deemed to divide; and

(c) in the case of a dividing wall shall, if an internal load bearing wall, comply with the requirements of regulation 54(1) and in any case be of a thickness of at least that prescribed by regulation 52 or 53 in respect of the wall which it is deemed to divide and shall have a length measured at right angles to the buttressed wall equal to not less than its height.