Section R. 408.10671 - Fire escape stairsRule 671.
(1) Fire escape stairs may be used as a required exit only in existing buildings. Fire escape stairs shall not constitute more than 50% of the required exit capacity. Fire escape stairs shall not constitute any part of the required exits for a new building.(2) Fire escape stair dimensions shall be in accordance with table 4. | TABLE 4 | |
| Minimum Width | 22 inches clear between rails |
| Minimum horizontal dimension of a landing or platform | 22 inches |
| Maximum rise | 9 inches |
| Minimum tread, exclusive of nosing | 9 inches |
| Spiral winders | Not permitted |
| Maximum height between landings | 12 feet |
(3) Fire escape stairs shall have walls or approved guards, and handrails on both sides.Mich. Admin. Code R. 408.10671
1979 AC; 2015 MR 8, Eff. April 29, 2015