Ontario Building Code Practice Exam

In the context of fire-rated wall assemblies within commercial buildings, the specific requirements are defined to ensure safety and compliance with the Ontario Building Code. A requirement that is not stipulated is the minimum thickness of the wall assembly being 50 mm.

Fire-rated walls are typically required to be constructed from non-combustible materials to prevent the spread of fire, which aligns with the first choice. Additionally, these walls must be labeled with a specific fire rating to indicate their effectiveness in fire-resistance, satisfying the second choice. Furthermore, fire-rated walls are required to extend continuously from the floor to the underside of the roof sheathing to maintain their integrity and effectiveness, fulfilling the third choice.

While thickness may be a consideration in the overall design and performance of the wall assembly, the Ontario Building Code does not specify a minimum thickness of 50 mm for fire-rated walls. Instead, the focus is on the materials used, the design, and continuous installation to ensure that the assembly meets the necessary fire-resistance rating, making thickness not a definitive requirement in this context.