Page 316 - 2015_Bldg Code
P. 316
MEANS OF EGRESS
SECTION 1029 provided, with one from each side of every balcony, gallery
ASSEMBLY or press box.
1029.1 General. A room or space used for assembly pur- 1029.6 Capacity of aisle for assembly. The required capac-
poses that contains seats, tables, displays, equipment or other ity of aisles shall be not less than that determined in accor-
material shall comply with this section. dance with Section 1029.6.1 where smoke-protected
assembly seating is not provided and with Section 1029.6.2
1029.1.1 Bleachers. Bleachers, grandstands and folding or 1029.6.3 where smoke-protected assembly seating is pro-
and telescopic seating, that are not building elements, vided.
shall comply with ICC 300.
1029.6.1 Without smoke protection. The required capac-
1029.1.1.1 Spaces under grandstands and bleachers. ity in inches (mm) of the aisles for assembly seating with-
Where spaces under grandstands or bleachers are used out smoke protection shall be not less than the occupant
for purposes other than ticket booths less than 100 load served by the egress element in accordance with all of
square feet (9.29 m2) and toilet rooms, such spaces shall the following, as applicable:
be separated by fire barriers complying with Section
707 and horizontal assemblies complying with Section 1. Not less than 0.3 inch (7.6 mm) of aisle capacity for
711 with not less than 1-hour fire-resistance-rated con- each occupant served shall be provided on stepped
struction. aisles having riser heights 7 inches (178 mm) or less
and tread depths 11 inches (279 mm) or greater,
1029.2 Assembly main exit. A building, room or space used measured horizontally between tread nosings.
for assembly purposes that has an occupant load of greater
than 300 and is provided with a main exit, that main exit shall 2. Not less than 0.005 inch (0.127 mm) of additional
be of sufficient capacity to accommodate not less than one- aisle capacity for each occupant shall be provided
half of the occupant load, but such capacity shall be not less for each 0.10 inch (2.5 mm) of riser height above 7
than the total required capacity of all means of egress leading inches (178 mm).
to the exit. Where the building is classified as a Group A
occupancy, the main exit shall front on not less than one street 3. Where egress requires stepped aisle descent, not less
or an unoccupied space of not less than 10 feet (3048 mm) in than 0.075 inch (1.9 mm) of additional aisle capac-
width that adjoins a street or public way. In a building, room ity for each occupant shall be provided on those por-
or space used for assembly purposes where there is not a tions of aisle capacity having no handrail within a
well-defined main exit or where multiple main exits are pro- horizontal distance of 30 inches (762 mm).
vided, exits shall be permitted to be distributed around the
perimeter of the building provided that the total capacity of 4. Ramped aisles, where slopes are steeper than one
egress is not less than 100 percent of the required capacity. unit vertical in 12 units horizontal (8-percent slope),
shall have not less than 0.22 inch (5.6 mm) of clear
1029.3 Assembly other exits. In addition to having access to aisle capacity for each occupant served. Level or
a main exit, each level in a building used for assembly pur- ramped aisles, where slopes are not steeper than one
poses having an occupant load greater than 300 and provided unit vertical in 12 units horizontal (8-percent slope),
with a main exit, shall be provided with additional means of shall have not less than 0.20 inch (5.1 mm) of clear
egress that shall provide an egress capacity for not less than aisle capacity for each occupant served.
one-half of the total occupant load served by that level and
shall comply with Section 1007.1. In a building used for 1029.6.2 Smoke-protected assembly seating. The
assembly purposes where there is not a well-defined main required capacity in inches (mm) of the aisle for smoke-
exit or where multiple main exits are provided, exits for each protected assembly seating shall be not less than the occu-
level shall be permitted to be distributed around the perimeter pant load served by the egress element multiplied by the
of the building, provided that the total width of egress is not appropriate factor in Table 1029.6.2. The total number of
less than 100 percent of the required width. seats specified shall be those within the space exposed to
the same smoke-protected environment. Interpolation is
1029.4 Foyers and lobbies. In Group A-1 occupancies, permitted between the specific values shown. A life safety
where persons are admitted to the building at times when evaluation, complying with NFPA 101, shall be done for a
seats are not available, such persons shall be allowed to wait facility utilizing the reduced width requirements of Table
in a lobby or similar space, provided such lobby or similar 1029.6.2 for smoke-protected assembly seating.
space shall not encroach upon the minimum width or required
capacity of the means of egress. Such foyer, if not directly Exception: For outdoor smoke-protected assembly
connected to a public street by all the main entrances or exits, seating with an occupant load not greater than 18,000,
shall have a straight and unobstructed corridor or path of the required capacity in inches (mm) shall be deter-
travel to every such main entrance or exit. mined using the factors in Section 1029.6.3.
1029.5 Interior balcony and gallery means of egress. For 1029.6.2.1 Smoke control. Aisles and aisle accessways
balconies, galleries or press boxes having a seating capacity serving a smoke-protected assembly seating area shall
of 50 or more located in a building, room or space used for be provided with a smoke control system complying
assembly purposes, not less than two means of egress shall be with Section 909 or natural ventilation designed to
maintain the smoke level not less than 6 feet (1829
mm) above the floor of the means of egress.
2015 INTERNATIONAL BUILDING CODE® 287
Copyrighted © 2014 by, or licensed to, ICC (ALL RIGHTS RESERVED); licensed to UL, LLC pursuant to License Agreement with ICC. No further reproductions authorized or distribution authorized.
ANY UNAUTHROIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT; AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.
