Width of stairs

[Terence McCann]

What does code say about the width of the exterior stairs. Looking for a minimum width.

[Bryan]

If it is a means of egress I believe the follow would apply:

R311.5 Stairways.

R311.5.1 Width.

Stairways shall not be less than 36 inches (914 mm) in clear width at all points above the permitted handrail height and below the required headroom height. Handrails shall not project more than 4.5 inches (114 mm) on either side of the stairway and the minimum clear width of the stairway at and below the handrail height, including treads and landings, shall not be less than 31.5 inches (787 mm) where a handrail is installed on one side and 27 inches (698 mm) where handrails are provided on both sides.

Exception: The width of spiral stairways shall be in accordance with Section R311.5.8.

From the 2006 IRC