A commercial building is being designed with a flat roof. Which of the following is the minimum required ventilation area for a flat roof with a slope of 1:12?
- A1 square foot of ventilation per 150 square feet of roof area
- 1 square foot of ventilation per 100 square feet of roof area
- C1 square foot of ventilation per 200 square feet of roof area
- D1 square foot of ventilation per 250 square feet of roof area
Exam tip
Always verify the required ventilation area for flat roofs to ensure proper ventilation.
Why B is correct
Option B is correct as per Section 1504.2.2 of the 2021 IBC, which requires a minimum ventilation area of 1 square foot per 100 square feet of roof area for flat roofs with a slope of 1:12. Option A, C, and D are incorrect as they do not meet the minimum required ventilation area.