Where any required egress capacity from a balcony or mezzanine passes through the room below, that required capacity shall be added to the required egress capacity of the room below.
Mezzanines and balconies are considered as part of the room in which they are located. Occupants of mezzanines and balconies experience the effects of a fire in the room to which such spaces are open as readily as the occupants of those space.