Question 37
Domain 2: Building Planning, Means of Egress, and Safety ProvisionsWhat is the maximum height for a single residential story per the IRC for conventional construction?
Correct answer: C
Explanation
The IRC limits a single residential story in conventional construction to a maximum floor-to-floor height of "11 feet 7 inches." This dimension is the code’s stated cap for one story, so any taller floor-to-floor height exceeds the prescriptive limit.
Why each option is right or wrong
A. 8 feet floor to ceiling
B. 10 feet floor to floor
C. 11 feet 7 inches floor to floor
IRC conventional construction provisions cap the floor-to-floor height of a single story at 11 feet 7 inches, which is the prescriptive maximum used for one residential story under the code. A floor-to-floor dimension above 11 feet 7 inches would exceed that limit and fall outside the conventional construction allowance.
D. 12 feet floor to floor