Ontario Building Code Practice Exam

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Which of the following is not a requirement for a fire-rated floor-ceiling assembly in a commercial building?

  1. Non-combustible materials

  2. Labeled with a fire rating

  3. Continuous from wall to wall

  4. Minimum thickness of 50 mm

The correct answer is: Minimum thickness of 50 mm

A minimum thickness of 50 mm is not a specific requirement for a fire-rated floor-ceiling assembly in a commercial building. The other options, including non-combustible materials, a labeled fire rating, and continuous construction from wall to wall, are all essential elements for a fire-rated assembly to effectively contain and prevent the spread of fire. While a minimum thickness may be recommended for certain types of fire-rated assemblies, it is not a universal requirement and may vary depending on the materials and construction used. Therefore, D is not a correct requirement for a fire-rated floor-ceiling assembly in a commercial building.

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