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What are the minimum stairway requirements?

April 26, 2017minimum requirements stairway

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What are the minimum stairway requirements?

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Residential Stairs, The minimum width of stairways is 36″. Rise and Run: The rise of steps and stairs shall not be less than 4 inches nor more than 73/4 inches. The greatest riser height within a flight of stairs shall not exceed the smallest by more than 3/8 inch. The run shall not be less than 11 inches. Stair treads shall be of uniform size and shape, except the largest tread run within any flight of stairs shall not exceed the smallest by more than 3/8 inch. Headroom: Every stairway shall have a headroom clearance of not less than 6 feet 8 inches.