A commercial building is being designed with a steep-slope roof. Which of the following is the minimum required slope for the roof to prevent ponding water?
- A2:12
- B1:12
- 3:12
- D4:12
Exam tip
Always check the minimum required slope for steep-slope roofs to prevent ponding water.
Why C is correct
Option C is correct as per Section 1504.2.1 of the 2021 IBC, which requires a minimum slope of 3:12 to prevent ponding water on steep-slope roofs. Option A is incorrect because it is not the minimum required slope. Option B and D are also incorrect as they exceed the minimum required slope.