Ontario Building Code Practice Exam

Which of the following is not a requirement for a fire separation wall in a commercial building?

1. Non-combustible materials

2. Minimum thickness of 100 mm

3. Minimum height of 3.0 meters

4. Continuous from floor to underside of roof sheathing

The correct answer is: Minimum height of 3.0 meters

Fire separation walls are an important safety feature in commercial buildings, as they help to prevent the spread of fire from one area of the building to another. These walls are designed to withstand high temperatures and prevent fire from spreading for a period of time, giving occupants a chance to evacuate safely. In order to achieve this goal, fire separation walls must meet certain requirements. Options A, B, and D are all necessary requirements for a fire separation wall. Non-combustible materials are essential for preventing the fire from spreading, a minimum thickness of 100 mm allows the wall to withstand high temperatures, and being continuous from floor to underside of roof sheathing ensures there are no gaps for fire to pass through. Option C, however, is incorrect because there is no specific minimum height requirement for a fire separation wall in commercial buildings. The height of the wall may vary depending on the building design and its intended purpose. Therefore, option C is not a requirement for a fire separation wall in a commercial building and is the correct answer to the question.