1023.9.5 Directions to openable doors.

Where doors serving interior exit stairways are locked on the stair side, signage shall be posted in compliance with Sections 1031.4.1, 1031.4.2 and 1031.4.3.

1023.10 Elevator lobby identification signs.

At landings in interior exit stairways where two or more doors lead to the floor level, any door with direct access to an enclosed elevator lobby shall be identified by signage located on the door or directly adjacent to the door stating "Elevator Lobby." Signage shall be in accordance with Section 1023.9.4, Items 4, 5 and 6.

1023.11 Smokeproof enclosures and pressurization alternative.

In buildings required to comply with Section 403 or 405, each of the interior exit stairways and ramps serving a story with a floor surface located more than 75 feet (22 860 mm) above the lowest level of Fire Department vehicle access or more than 30 feet (9144 mm) below the finished floor of a level of exit discharge serving such stories shall be protected by a smokeproof enclosure or pressurization alternative in accordance with Section 909.20.

1023.11.1 Termination and extension.

A smokeproof enclosure or pressurization alternative shall terminate at an exit discharge or a public way. The smokeproof enclosure or pressurization alternative shall be permitted to be extended by an exit passageway in accordance with Section 1023.3. The exit passageway shall be without openings other than the fire door assembly required by Section 1023.3.1 and those necessary for egress from the exit passageway. The exit passageway shall be separated from the remainder of the building by 2-hour fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both.

   Exceptions:

      1.   Openings in the exit passageway serving a smokeproof enclosure are permitted where the exit passageway is protected and pressurized in the same manner as the smokeproof enclosure, and openings are protected as required for access from other floors.

      2.   Openings in the exit passageway serving a pressurization alternative are permitted where the exit passageway is protected and pressurized in the same manner as the pressurization alternative.

      3.   The fire barrier separating the smokeproof enclosure or pressurization alternative from the exit passageway is not required, provided the exit passageway is protected and pressurized in the same manner as the smokeproof enclosure or pressurization alternative.

      4.   A smokeproof enclosure or pressurization alternative shall be permitted to egress through areas on the level of exit discharge or vestibules as permitted by Section 1028.

1023.11.2 Enclosure access.

Access to the stairway or ramp within a smokeproof enclosure shall be by way of a vestibule or an open exterior balcony.

   Exception: Access is not required by way of a vestibule or exterior balcony for stairways and ramps using the pressurization alternative complying with Section 909.20.5.

Section BC 1024: Exit Passageways

1024.1 Exit passageways.

Exit passageways serving as an exit component in a means of egress system shall comply with the requirements of this section. An exit passageway shall not be used for any purpose other than as a means of egress and a circulation path.