There shall be a floor or landing at the top and bottom of each flight of stairs. The width perpendicular to the direction of travel DRAWING 25 shall be not less than the width of the flight served DRAWING 26. For landings of shapes other than square or rectangular the depth at the walk line and the total area shall be not less than that of a quarter circle with a radius equal to the required landing width DRAWING 27. Where the stairway has a straight run, the depth in the direction of travel shall be not less than 36 inches (914 mm).
Exceptions: 1. The top landing of an interior stairway, including those in an enclosed garage, shall be permitted to be on the other side of a door located at the top of the stairway, provided that the door does not swing over the stairs.
- At an enclosed garage, the top landing at the stair shall be permitted to be not more than 7 3/4 inches (197 mm) below the top of the threshold.
- At exterior doors, a top landing is not required for an exterior stairway of not more than two risers, provided that the door does not swing over the stairway.
- Exterior stairways to grade with three or fewer risers serving a deck, porch or patio shall have a bottom landing width of not less than 36 inches (914 mm), provided that the stairway is not the required access to grade serving the required egress door.
