1985 Ed.]
Building (Construction) Regulations
[CAP. 123
67. (1) The maximum stresses specified in regulations 65 and 66 may be exceeded by not more than 25 per cent where such excess is caused solely by eccentricity of loading or to lateral forces or to a combination of both.
(2) Additional stresses of a purely local nature, as at girder bearings, column bases and lintels or other concentrated loads, are to be calculated and the maximum stress resulting from these combined with those provided for in regulations 65 and 66 and paragraph (1) shall not exceed the permissible stress given in regulations 65 and 66, as the case may be, by more than 50 per cent.
(3) In the case of walls of bricks or building blocks, no reliance shall be placed on the tensile strength of the bricks or building blocks.
68. (1) Where an external wall is constructed of materials used in combination with a framework of steel or reinforced concrete, any part of that wall which does not sustain and transmit any load other than that due to its own weight and to wind pressure on its own surface may be deemed to be a separate panel wall.
(2) In every panel wall constructed, otherwise than as a cavity wall, of bricks, building blocks or plain concrete—
(a) the thickness shall be not less than 225 mm throughout: (b) the height shall not exceed 7 m:
(c) either the height or the length (whichever is the less) shall not exceed 18 times the thickness; and
(d) the base shall not overhang the beam upon which it is supported, to a greater extent than of the thickness of the panel.
(3) In every panel wall constructed as a cavity wall—
(a) the provisions of regulation 60 shall be complied with except that the inner leaf may be constructed of solid or hollow bricks or blocks not less than 100 mm thick:
(b) the height shall not exceed 7 m:
(c) either the height or the length (whichever is the less) shall not exceed 3.5 m;
(d) the area shall not exceed 20 m2: and
(e) the base shall not overhang the beam upon which it is supported, to a greater extent than of the thickness of the overhanging leaf:
Provided that, if the bottom courses are built solid for the full thickness of the panel wall to a height above its base at least equal to that full thickness, the base may overhang the beam to an extent not exceeding of that full thickness.
B 45
[Subsidiary]
Eccentric loads and lateral forces on slender walls.
Panel walls.
L.N. 294/76.
L.N. 43/85
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