The Ontario Building Code | Reduction in Thickness of Fire Separation by Beams and Joists

9.10.9.9. Reduction in Thickness of Fire Separation by Beams and joists

(1) Where pockets for the support of beams or joists are formed in a masonry or concrete fire separation, the remaining total thickness of solid masonry and/or grout and/or concrete shall be not less than the required equivalent thickness shown for Type S monolithic concrete in Table 2.1.1. of MMAH Supplementary Standard SB-2, "Fire Performance Ratings", for the required fire-resistance rating.