The Ontario Building Code | Support of Floor Joists support of floor joists

(1) Except as permitted in Sentence (2), foundation walls of hollow unit masonry supporting floor joists shall be,

(a) capped with not less than 50 mm of solid masonry or concrete, or

(b) have the top course filled with mortar or concrete.

(2) Capping required in Sentence (1) is permitted to be omitted,

(a) in localities where termites are not known to occur,

(b) when the joists are supported on a wood plate not less than 38 mm by 89 mm, and

(c) when the siding overlaps the foundation wall not less than 12 mm.