Escalators used as a means of egress shall conform with all of the following standards:
- (1) Maximum uninterrupted vertical travel of one story.
- (2) An escalator 24 inches in width or larger shall be considered a maximum of one unit of width.
- (3) Escalators shall be of the horizontal tread type.
- (4) Escalators shall not exceed 50% of the required units of exit.