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 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

A fire-rated floor-ceiling assembly in a high-rise building requires that the materials used are non-combustible, labeled with a fire rating, and installed continuously from wall to wall. This means that Option D, which states a minimum thickness of 100 mm, is incorrect because there is no specific requirement for the floor-ceiling assembly thickness in terms of fire rating. While a thicker assembly may provide additional fire resistance, it is not a requirement. Therefore, Option D is not a necessary requirement for a fire-rated floor-ceiling assembly in a high-rise building.

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