Section R. 408.10643 - Doors; general provisionsRule 643.
(1) A door assembly, including the doorway, frame, door, and necessary hardware, may be used as a component in a means of egress when it conforms to the requirements of this part. As such, the assembly is designated as an exit door.(2) A single leaf of an exit door shall be not less than 28 inches nor more than 48 inches in width.(3) Where a door or gate opens directly on a stairway, a platform shall be provided, and the swing of the door or gate shall not reduce the floor area leading to the stairs to a width less than 20 inches.Mich. Admin. Code R. 408.10643
1979 AC; 1990 AACS; 2015 MR 8, Eff. April 29, 2015