Ontario Building Code Practice Exam

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Which of the following is not required for a fire-rated floor-ceiling assembly in a high-rise building?

  1. Non-combustible materials

  2. Labeled with a fire rating

  3. Continuous from wall to wall

  4. Minimum thickness of 100 mm

The correct answer is: Minimum thickness of 100 mm

Fire-rated floor-ceiling assemblies in high-rise buildings require non-combustible materials, a fire rating label, and a continuous structure from wall to wall to provide adequate protection against spreading fire. A minimum thickness of 100 mm is not required and would not provide any functional benefit in preventing fire.

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