Question 26
Domain 2: Building Planning, Means of Egress, and Safety ProvisionsWhat is the maximum sill height for an emergency escape and rescue opening per the IRC?
Correct answer: B
Explanation
The IRC requires emergency escape and rescue openings to have a maximum sill height of "44 inches above the floor." This limit ensures the opening is low enough for occupants to use quickly in an emergency while still meeting the code requirement.
Why each option is right or wrong
A. 36 inches from the floor
B. 44 inches from the floor
IRC Section R310.2.2 sets the maximum sill height for emergency escape and rescue openings at 44 inches measured from the finished floor to the clear opening. The code uses this exact 44-inch limit to keep the opening accessible for emergency egress while still allowing normal window construction.
C. 48 inches from the floor
D. 60 inches from the floor