1964_BUILDING_(CONSTRUCTION)_REGULATIONS — Page 19

1985 Ed.]

Building (Construction) Regulations

{CAP. 123

B 19

[Subsidiary]

PART III

LOADS

24. (1) Every building, including its foundations, shall be designed to the satisfaction of the Building Authority to resist the combined effects, as well as the separate effects, of dead and imposed loads and wind loads on walls and roofs, including internal wind pressures, for winds from any direction.

(2) A building shall be deemed to be designed in accordance with paragraph (1) in respect of wind load if its design complies with the Code of Practice on Wind Effects published from time to time by the Building Authority.

25. (1) In calculating dead load, the unit weights of the materials shall be deemed to be-

(a) those specified in B.S. 648:1964 in the case of material

therein mentioned; and

(b) in the case of any other materials, such unit weights as may be ascertained to the satisfaction of the Building Authority. (2) The dead load of any partitions whereof the positions are not definitely located in the design of the building, shall be deemed to be a uniformly distributed load m2 of the floor on which the partitions are to be created of 30 per cent of the estimated dead weight per metre run of those partitions but no less than 1 kPa/m2 if that floor or part of a floor is used for office purposes.

(3) In all cases the imposed loads to be provided for shall be ascertained to the satisfaction of the Building Authority but, subject to the provisions of this regulation-

(a) the minimum imposed loads (not including induced wind loads) for the floors, roofs, stairs and landings and corri- dors and cantilever steps of the types specified in Table VII and for slabs forming part of, and for beams supporting such floors, roofs, stairs and landings and corridors and cantilever steps, shall be-

(i) the loads specified in column 3 of Table VII; or

(ii) the loads specified in column 4 or 5, as the case may be, of Table VII,

whichever shall be the heavier;

(b) for the purpose of ascertaining the reactions to be allowed for in calculating the loads on columns, piers, walls or foundations, the minimum imposed loads (not including induced loads from wind effects) shall be either-

(i) the loads specified in column 3 of Table VII; or

(ii) as ascertained to the satisfaction of the Building Authority,

whichever shall be the heavier; and

Buildings to be designed for wind effects.

L.N. 268/83.

Design loads.

L.N. 294/76.