The Ontario Building Code | Cavity Walls Supporting Framing Members
126.96.36.199. Cavity walls supporting Framing Members
(1) floor joists supported on cavity walls shall be supported on solid units not less than 57 mm high.
(2) floor joists described in Sentence (1) shall not project into the cavity.
(3) Roof and ceiling framing members bearing on cavity wallsshall be supported on,
(a) not less than 57 mm of solid masonry, bridging the full thickness of the wall, or
(b) a wood plate not less than 38 mm thick, bearing not less than 50 mm on each wythe.