R 408.10647 Revolving doors.

Rule 647. (1) A revolving door shall be considered an approved exit door only if all of the following conditions are satisfied: (a) The door shall be installed before the prohibition listed in subrule (2) of this rule. (b) The number of revolving doors used as exit doors shall not be more than the number of swinging doors used as exit doors within 20 feet thereof. (c) A revolving door without an adjacent swinging door may serve as an exit for a street floor elevator lobby if no stairway or door from other parts of the building discharges through the lobby and the lobby has no occupancy other than as a means of travel between elevators and the street. (d) A revolving door shall be equipped with means to prevent its rotation at more than 12 1/2 revolutions per minute. (e) A revolving door shall not be used at the foot of stairs from upper floors or at the head of stairs from the basement or other lower floors. (f) A revolving door credited as an exit door shall have a rated capacity of 1/2 unit of exit width. (2) A revolving door that is installed after June 15, 1990, shall not be considered an approved exit door.