Question 24
Domain 2: Building Planning, Means of Egress, and Safety ProvisionsAccording to the IRC, what is the minimum width of a hallway in a residential dwelling?
Correct answer: B
Explanation
The IRC requires hallways in residential dwellings to have a minimum clear width of "36 inches." This width provides the required passage space for occupants and aligns with the code’s minimum egress and circulation standards.
Why each option is right or wrong
A. 30 inches
B. 36 inches
IRC Section R311.6 requires hallways in one- and two-family dwellings and townhouses to have a minimum clear width of 36 inches. The code measures this as clear passage width, so any hallway in the dwelling that falls below 36 inches would not comply with the residential circulation requirement.
C. 42 inches
D. 48 inches