Question 38
Domain 2: Building Planning, Means of Egress, and Safety ProvisionsAccording to the IRC, what must be provided at each required exit door to the exterior?
Correct answer: B
Explanation
IRC Section R311.3 requires a landing or floor at each required exterior door. It states that the landing must be provided "on each side of the door" and be "not more than 1-1/2 inches below the top of the threshold," which is why the answer matches the code requirement.
Why each option is right or wrong
A. A covered porch of at least 20 square feet
B. A landing or floor on each side of the door not more than 1-1/2 inches below the top of the threshold
IRC Section R311.3 governs required egress door landings and specifies that a landing or floor must be provided on each side of each required exterior door. The code also limits the vertical difference at the threshold: the landing/floor may be no more than 1-1/2 inches below the top of the threshold, which matches the stated requirement exactly.
C. A ramp with a 1:12 slope
D. A screen door for insect protection