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The minimum width of stairways is 36. Handrails may project into the required width a distance of 3 Â½ from each side of a stairway. Stringers and other projects such as trim and similar decorative features may project into the required width 1 Â½ on each side.
width of each landing shall not be less than the width of the stairway served. Every landing. shall have a minimum dimension of 36 inches (914 mm) measured in the direction of travel. R311.3 Floors and landings at exterior doors. There shall be a landing or floor on each side of each exterior door. The. width of each landing shall not be less than the door served. Every landing shall have a minimum dimension of 36 inches. (914 mm) measured in the direction of travel.