The Ontario Building Code | Floor Assembly over Basement

3.2.1.4. floor Assembly over basement

(1) Except as permitted by Sentence 3.2.2.42.(3), 3.2.2.43.(3), 3.2.2.44.(3), 3.2.2.45.(3), 3.2.2.46.(3), 3.2.2.47.(3) or 3.2.2.48.(3), a floor assembly immediately above a basement shall be constructed as a fire separation having a fire-resistance rating conforming to the requirements of Articles 3.2.2.20. to 3.2.2.83. for a floor assembly, but not less than 45 min.

(2) All loadbearing walls, columns and arches supporting a floor assembly immediately above a basementshall have a fire-resistance rating not less than that required by Sentence (1) for the floor assembly.