Residential Building Inspector B1Building Planning and Life SafetyEasy
An inspector is reviewing the egress requirements for a proposed basement in a new single-family home. The basement contains a habitable sleeping room. What is the minimum clear opening height for an emergency escape and rescue opening in this sleeping room?
- A22 inches
- B24 inches
- C30 inches
- D20 inches
Show answer & explanationAnswer & explanation
Correct answer: B. 24 inches
According to the 2021 IRC, Section R310.2.1, emergency escape and rescue openings are required to have a minimum net clear opening height of 24 inches (610 mm).
Why the other options are wrong
- A. 22 inches is not a specified minimum dimension for egress openings.
- C. 30 inches exceeds the minimum requirement.
- D. 20 inches is the minimum clear opening width, not height.
Egress Opening Height
The minimum vertical dimension of the clear opening required for an emergency escape and rescue window or door.
- Applies to all habitable rooms in basements and sleeping rooms.
- Ensures occupants can exit and rescuers can enter.
- Specified in IRC Section R310.2.1.
Memory trick: Egress openings are an escape route for you and a rescue path for them.