Ontario Building Code Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

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Question: 1 / 400

Which of the following is not a requirement for a fire-rated shaft in a high-rise building?

Non-combustible materials

Continuous from floor to underside of roof sheathing

Minimum thickness of 75 mm

Minimum height of 2.4 meters

A fire-rated shaft in a high-rise building requires non-combustible materials, continuous construction from floor to underside of roof sheathing, and a minimum thickness of 75 mm.

Option D, a minimum height of 2.4 meters, is not a specific requirement for a fire-rated shaft. While it is important for fire safety and evacuation purposes, it is not a characteristic that distinguishes a fire-rated shaft from a non-fire-rated shaft. Thus, option D is not the correct answer.

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