Section 1024 Exit Passageways
The required capacity of exit passageways shall be determined as specified in Section 1005.1 but the minimum width shall be not less than 44 inches (1118 mm), except that exit passageways serving an occupant load of less than 50 shall be not less than 36 inches (914 mm) in width. The minimum width or required capacity of exit passageways shall be unobstructed.
Exception: Encroachments complying with Section 1005.7.
Except as permitted in Section 402.8.7, openings in exit passageways other than unprotected exterior openings shall be limited to those necessary for exit access to the exit passageway from normally occupied spaces and for egress from the exit passageway.
Elevators shall not open into an exit passageway.
Penetrations into or through an exit passageway are prohibited except for the following:
- Equipment and ductwork necessary for independent pressurization.
- Fire protection systems.
- Security systems.
- Two-way communication systems.
- Electrical raceway for fire department communication.
- Electrical raceway serving the exit passageway and terminating at a steel box not exceeding 16 square inches (0.010 m2).
- The equipment and ductwork shall be located exterior to the building and shall be directly connected to the exit passageway by ductwork enclosed in construction as required for shafts.
- Where the equipment and ductwork is located within the exit passageway, the intake air shall be taken directly from the outdoors and the exhaust air shall be discharged directly to the outdoors, or the air shall be conveyed through ducts enclosed in construction as required for shafts.
- Where located within the building, the equipment and ductwork shall be separated from the remainder of the building, including other mechanical equipment, with construction as required for shafts.
In each case, openings into the fire-resistance-rated construction shall be limited to those needed for maintenance and operation and shall be protected by opening protectives in accordance with Section 716 for shaft enclosures.