The Ontario Building Code | Lateral Support Required
188.8.131.52. Lateral support Required
(2) The spacing of supports required in Sentence (1) shall be not more than,
(3) In applying Sentence (2), the thickness of cavity wallsshall be taken as the greater of,
(a) two-thirds of the sum of the thicknesses of the wythes, or
(b) the thickness of the thicker wythe.
(4) floor and roof structural elements providing lateral support for walls as required in Sentence (1) shall be constructed to transfer lateral loads to walls or buttresses approximately at right angles to the laterally supported walls.