Section R. 408.42127 - Access to other elevationsRule 2127.
(1) A means of access, such as a stairway, ladder, or ramp, shall be provided at all personnel points of access where there is a break in elevation of 19 inches (48 cm) or more and a runway, sloped embankment, or personnel hoist is not provided.(2) When a building or structure has only 1 point of access between levels, that point of access shall be kept clear to permit the free passage of employees. When work must be performed or equipment must be used such that the free passage of employees at that point of access is restricted, a second point of access shall be provided and used.(3) When a building or structure has 2 or more points of access between levels, at least 1 point of access shall be kept clear to permit the free passage of employees.(4) Employees shall not use any spiral stairways that will not be a permanent part of the structure on which construction work is being performed.Mich. Admin. Code R. 408.42127