Ontario Building Code Practice Exam

Which of the following is not a requirement for a fire-rated floor assembly in an industrial 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

The minimum thickness of 100 mm is not a requirement for a fire-rated floor assembly in an industrial building. The other options are all necessary components for a fire-rated floor assembly. Option A, non-combustible materials, ensures that the materials used in the construction of the floor will not contribute to the spread of fire. Option B, being labeled with a fire rating, provides important information about the fire resistance of the floor to building occupants and emergency responders. Option C, being continuous from wall to wall, prevents fire from spreading through gaps or openings in the floor. Option D, minimum thickness of 100 mm, is not a necessary requirement for a fire-rated floor and is not mentioned in fire safety codes or standards.