In no case shall any path of exit travel from any point in any building to a way of departure outside of the building, pass directly in front of or immediately over any window, or other wall ventilating opening, or any skylight or any opening in any vent flue for any hazardous use unit which is less than 24 feet distant therefrom; provided, however, that it shall be permissible for any means of exit to pass directly in front of or directly over any fire window or non- combustible door in any such hazardous use unit.
(Prior code § 60-25)