Section R. 400.18648 - Doors and doorwaysRule 648.
(1) A doorway that leads to a fire escape shall be at floor level, except where a proper approved ramp is provided. A ramp shall not have more than 1 foot of rise in 12 feet of run.(2) A door from a resident bedroom and a door that forms a part of an approved means of egress shall be not less than 30 inches in width.(3) A door into a stairway enclosure and a door that serves other vertical openings shall be of equal fire-resistant rating as the partition in which they are installed and shall be equipped with approved self-closing devices that are designed, installed, and maintained to close the doors automatically. The doors shall be hung so as to allow for convenient manual opening and closing at all times. The doors shall be maintained in a closed position and shall have a prominent sign on each side that states the following: "Keep Door Closed for Fire Safety." Any glass in the doors shall be 1/4-inch wired glass and shall not be more than 6 square feet in area.(4) An egress door from a resident-occupied room shall be equipped with hardware that will ensure opening by a single motion, such as turning a knob or by pressure of a latch using normal strength. A door which is provided or designated as an exit and which gives egress directly to the outside shall be equipped with approved anti-panic hardware or a knob of a type that is nonlocking against egress. The use of hooks and eyes, bolts, bars, and similar devices is expressly prohibited on doors which are provided for exit purposes or which are designated as exits.(5) A doorway that enters upon a common use corridor or egress passage shall be protected by a substantially constructed side-hinged, swing-type door that is constructed to provide a reasonably smoketight enclosure.(6) An existing transom and any like opening in a corridor or passageway shall be permanently sealed and made fire-resistant equal to the fire-resistance rating of the related partition construction.Mich. Admin. Code R. 400.18648