505.3.2 Public entry and corridor signage.

In a Group R-1 or R-2 building or occupancy with more than eight dwelling units on a floor, a sign shall be conspicuously posted in the elevator lobby or other public entry on each floor, and in the public corridor opposite each stairwell entrance, identifying by directional arrows and dwelling unit numbers and/or letters, the direction to each dwelling unit. Such signage need not be provided in the public entry or opposite any stairwell entrance in any building or on any floor where the entrances to dwelling units are located in a single direction from such entry or stairwell entrance.

505.3.3 Existing installations.

Existing buildings and occupancies shall comply with the operational requirements for marking and signage set forth in FC 505.3.1 and 505.3.2 within 2 years of the effective date of this section.

505.4 Apartment, guest room and stairwell fire emergency markings.

Dwelling units (apartments, guest rooms and sleeping rooms) and stairwell entrances in Group R-1 and Group R-2 buildings and occupancies shall be marked in accordance with this section and the rules to facilitate firefighting and emergency rescue operations at the premises.

505.4.1 Multi-floor dwelling units.

The entrance door to a multi-floor dwelling unit in a Group R-1 or Group R-2 building or occupancy shall be identified on the door jamb on the public corridor side of the door by an approved fire emergency marking, not more than 12 inches (305 mm) from the bottom of the door, indicating the dwelling unit number and/or letter. In addition, every door of each such multi-floor dwelling unit that opens to a public corridor or other means of egress shall be identified on the public corridor side of the door by one or more upward or downward-pointing arrows indicating the direction(s) of the other floor(s) to which the multi-floor dwelling unit is connected.

505.4.2 Apartment and sleeping rooms.

Except as otherwise provided in FC 505.4.1, and except in buildings protected throughout by a sprinkler system, in a Group R-1 or R-2 building or occupancy with more than eight dwelling units on a floor, each dwelling unit shall be identified on the door jamb on the public corridor side of the door by an approved fire emergency marking, not more than 12 inches (305 mm) from the bottom of the door, indicating the dwelling unit number and/or letter.

505.4.3 Stairwell signage.

Except in buildings protected throughout by a sprinkler system, each stairwell door in a building or occupancy subject to compliance with the requirements of FC 505.4.1 or FC 505.4.2 shall be identified as a stairwell door on the door jamb on the public corridor side of the door with an approved marking or sign not more than 12 inches (305 mm) from the bottom of the door, unless such stairwell entrance has been marked in compliance with Section 1024* of the Building Code.

* Editor's note: correct reference should be Section 1031 of the Building Code.