1029.2 Assembly Main Exit

A building, room or space used for assembly purposes that has an occupant load of greater than 300 and is provided with a main exit , that main exit shall be of sufficient capacity to accommodate not less than onehalf of the occupant load , but such capacity shall be not less than the total required capacity of all means of egress leading to the exit . Where the building is classified as a Group A occupancy, the main exit shall front on not less than one street or an unoccupied space of not less than 10 feet (3048 mm) in width that adjoins a street or public way . In a building, room or space used for assembly purposes ...

Every room or space that is an assembly occupancy shall have the occupant load of the room or space posted in a conspicuous place, near the main ...

be permitted to have their main exit open to the open mall ...

of Section 1029.7. 8. Exit access stairways and ramps serving the balcony, gallery or press box and the main assembly floor in occupancies such as theaters, places of religious worship , auditoriums and sports facilities. In Group I-2 and I-3 occupancies, floor openings between stories containing exit access ...

dwelling units per floor; with a smokeproof enclosure or outside stairway as an exit; and with such exit located within 20 feet (6096 mm) of travel to the entrance doors to all dwelling units served thereby. 10. In buildings of Group R-3 occupancy equipped throughout with an automatic fire sprinkler system, only one exit shall be required from basements or stories below grade. For other than Group I-2, where more than one exit is required, an existing or newly constructed fire escape complying with Section 805.3.1.2.1 shall be accepted as providing one of the required means of egress. Fire escapes shall comply with all of the following requirements: 1. Occupants shall have unobstructed access to the fire escape without having to pass through a room subject to locking. 2. Access to a new fire escape shall be through a door, except that windows shall be permitted to provide access from single dwelling units or sleeping units in Group R-1, R-2 and I-1 occupancies or to provide access from spaces having a maximum occupant load of 10 in other occupancy classifications. 2.1. The window shall have a minimum net clear opening of 5.7 square feet (0.53 m 2 ) or 5 square feet (0.46 m 2 ) where located at grade. 2.2. The minimum net clear opening height shall be 24 inches (610 mm) and net clear opening width shall be 20 inches (508 mm). 2.3. The bottom of the clear opening shall not be greater than 44 inches (1118 mm) above the floor. 2.4. The operation of the window shall comply with the operational constraints of the International Building Code . 3. Newly constructed fire escapes shall be permitted only where exterior stairways cannot be utilized because of lot lines limiting the stairway size or because of the sidewalks, alleys, or roads at grade level. 4. Openings within 10 feet (3048 mm) of fire escape stairways shall be protected by fire assemblies having minimum 3 / 4 -hour fire-resistance-ratings. Exception: Opening protection shall not be required in buildings equipped throughout with an approved automatic sprinkler system. 5. In all buildings of Group E occupancy, up to and including the 12th grade, buildings of Group I occupancy, rooming houses and childcare centers, ladders of any type are prohibited on fire escapes used as a required means of egress. The fire escape shall be designed to support a live load of 100 pounds per square foot (4788 Pa) and shall be constructed of steel or other approved noncombustible materials . Fire escapes constructed of wood not less than nominal 2 inches (51 mm) thick are permitted on buildings of Type V construction. Walkways and railings located over or supported by combustible roofs in buildings of Types III and IV construction are permitted to be of wood not less than nominal 2 inches (51 mm) thick. Stairways shall be at least 22 inches (559 mm) wide with risers not more than, and treads not less than, 8 inches (203 mm). Landings at the foot of stairways shall be not less than 40 inches (1016 mm) wide by 36 inches (914 mm) long and located not more than 8 inches (203 mm) below the door. Mezzanines in the work area and with an occupant load of more than 50 or in which the travel distance to an exit exceeds 75 feet (22 860 mm) shall have access to at least two independent means of egress. Exception: Two independent means of egress are not required where the travel distance to an exit does not exceed 100 feet (30 480 mm) and the building is protected throughout with an automatic sprinkler system. All buildings of Group A with an occupant load of 300 or more shall be provided with a main entrance ...