The Ontario Building Code | Basement Storage Garages

9.10.4.3. basement Storage garages

(1) Where a basement is used primarily as a storage garage, the basement is permitted to be considered as a separate buildingfor the purposes of this Section provided the floor above the basement and the exterior walls of the basement above the adjoining ground level are constructed as fire separations of masonry or concrete having a fire-resistance ratingof not less than 2 h.