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PM-702.4 Arrangement: Exits from dwelling units, rooming units, guestrooms and dormitory units shall not lead through other such units or through toilet rooms or bathrooms. PM-702.5 Exit signs: All means of egress shall be indicated with approved "Exit" signs where required by the building code adopted by the City of Uuiversity City. All "Exit" signs shall be maintained visible and all illuminated "Exit" signs shall be illuminated at all times that the building is occupied. PM-702.6 Corridor enclosure: All corridors serving an occupant load greater than 30 and the openings therein shall provide an effective barrier to resist the movement of smoke. All transoms, louvers, doors and other openings shall be closed or shall be self-closing. Exceptions: Corridors in occupancies in other than Use Group H which are equipped throughout with an automatic sprinkler system. Patient room doors in corridors in occupancies in Use Group 1-2 where smoke barriers are provided in accordance with the fire prevention code adopted by the City of University City, are not required to be self-closing. Corridors in occupancies in Use Group E where each room that is occupied for instruction or assembly purposes has at least one-half of the required means of egress doors opening directly to the exterior of the building at ground level. Corridors that are in compliance with the building code adopted by the City of University City. PM-702.7 Dead-end travel distance: All corridors that serve more than one exit shall provide direct connection to such exits. The length of a dead-end corridor shall not exceed 35 feet (10,668 mm) where the building is not equipped throughout with an automatic sprinkler system. The dead-end travel distance limitation shall be increased to 70 feet (21,336 mm) where the building is equipped throughout with an automatic sprinkler system. 26