1985 Ed.]
Building (Construction) Regulations
[CAP. 123
B 99
DIAGRAM 7
Critical section for shearing stress in flat slabs without drop
40mm
CRITICAL SECTION FOR SHEAR
D
STEPP
DIAGRAM 8
Critical sections for shearing stresses in flat slabs with drop
悭
CRITICAL SECTIONS FOR SHEAR
40 mm
[Subsidiary]
L.N. 294/76.
151. (1) An opening shall not encroach on a column head or a drop.
(2) Except where the aggregate length or width of openings does not exceed any of the following--
(a) in the area common to 2 middle strips, 0.4L measured parallel to the centre line;
(b) in the area common to a middle strip and a column strip, the width of the strip;
Openings in panels in flat slab construction.