Ontario Building Code Practice Exam

What is the minimum height required for a guardrail on a roof in a residential building?

1. 900 mm

2. 1000 mm

3. 1100 mm

4. 1200 mm

The correct answer is: 1100 mm

It is important to have a guardrail on a roof in a residential building to ensure safety. In this case, the minimum height required for the guardrail is 1100 mm. Option A, 900 mm, is too short and may not adequately protect individuals from falling. Option B, 1000 mm, is also too short and does not meet the minimum height requirement. Option D, 1200 mm, is too high and may be unnecessary for a residential building. Therefore, option C, 1100 mm, is the correct and most suitable height for a guardrail on a roof in a residential building.