Regarding stairwells installed after March 15, 1991, what is the acceptable height range for the top edge of a stair rail system used as a handrail?

a. More than 37 inches
b. Between 37 to 36 inches
c. Exactly 36 inches
d. Less than 36 inches
Question: In grandfathered stairwells installed prior to March 15, 1991, what is the permissible height range for stair rails from the upper surface of the stair rail system to the surface of the tread?

a. Between 34 to 30 inches
b. Exactly 34 inches
c. More than 34 inches
d. Less than 30 inches