This Architectural Drawing is AutoCAD 2d drawing of Office building stairway section details in AutoCAD, dwg file. Stairs must be at least 36" wide with a minimum headroom of 6' 8" Risers must have a maximum height of 7 ¾" and open risers must be 4" high or shorter. Each tread in a stair must have a minimum depth of 10". The treads of curved staircases must not be less than 6" deep.
