Ontario Building Code Practice Exam

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Which of the following is not a requirement for a fire-rated floor assembly in a residential 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 fire-rated floor assembly in a residential building must have a minimum thickness of 50 mm to ensure proper insulation and structural integrity in the event of a fire. Non-combustible materials, a fire rating label, and continuity from wall to wall are all essential requirements for a fire-rated floor assembly. However, the thickness requirement is not necessary and thus is not a requirement for a fire-rated floor assembly in a residential building.

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