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 commercial building?

  1. Non-combustible materials

  2. Labeled with a fire rating

  3. Continuous from wall to wall

  4. Minimum thickness of 75 mm

The correct answer is: Minimum thickness of 75 mm

A fire-rated floor assembly in a commercial building is required to have non-combustible materials, be labeled with a fire rating, and be continuous from wall to wall. The thickness of the floor varies based on the rating needed for the specific building and its use, so there is no specific minimum thickness required. Therefore, option D is not a requirement for a fire-rated floor assembly.

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