What are the requirements for stairs and handrails?
For one- and two-family homes, the minimum stair tread is 9 inches, and the maximum riser height is 8 ΒΌ inches. The minimum stair width is 36 inches. Handrails are required for stairs that have more than two risers; the minimum height is 34 inches and the maximum height is 38 inches, measured form the nosing of the stair tread. Handrails and deck guards shall not have any openings between spindles/barristers greater than 4 inches. Commercial and multi-family codes are different.