Page 226 - 2018_IFC

MEANS OF EGRESS

feet (3658 mm) of aisle accessway length measured (305 mm) aisle accessway, beyond which the aisle
from the center of the seat farthest from an aisle. accessway minimum clear width shall be increased,
Exception: Portions of an aisle accessway having a are in Table 1029.13.2.1.
length not exceeding 6 feet (1829 mm) and used by [BE] 1029.13.2.2 Single access. For rows of seating
a total of not more than four persons. served by an aisle or doorway at only one end of the
[BE] 1029.13.1.2 Seating at table aisle accessway row, the minimum clear width of 12 inches (305 mm)
length. The length of travel along the aisle accessway between rows shall be increased by 0.6 inch (15.2 mm)
shall not exceed 30 feet (9144 mm) from any seat to the for every additional seat beyond seven seats where
point where a person has a choice of two or more paths seats have backrests or beyond 10 where seats are with-
of egress travel to separate exits. out backrests. The minimum clear width is not required
to exceed 22 inches (559 mm).
[BE] 1029.13.2 Clear width of aisle accessways serving
seating in rows. Where seating rows have 14 or fewer Exception: For smoke-protected or open-air assem-
seats, the minimum clear aisle accessway width shall be bly seating, the row length limits for a 12-inch-wide
not less than 12 inches (305 mm) measured as the clear (305 mm) aisle accessway, beyond which the aisle
horizontal distance from the back of the row ahead and the accessway minimum clear width shall be increased,
nearest projection of the row behind. Where chairs have are in Table 1029.13.2.1.
automatic or self-rising seats, the measurement shall be [BE] 1029.14 Assembly aisle walking surfaces. Ramped
made with seats in the raised position. Where any chair in aisles shall comply with Sections 1029.14.1 through
the row does not have an automatic or self-rising seat, the 1029.14.1.3. Stepped aisles shall comply with Sections
measurements shall be made with the seat in the down 1029.14.2 through 1029.14.2.4.
position. For seats with folding tablet arms, row spacing [BE] 1029.14.1 Ramped aisles. Aisles that are sloped
shall be determined with the tablet arm in the used posi- more than one unit vertical in 20 units horizontal (5-per-
tion. cent slope) shall be considered to be a ramped aisle.
Exception: For seats with folding tablet arms, row Ramped aisles that serve as part of an accessible route in
spacing is permitted to be determined with the tablet accordance with Sections 1009 of this code and Section
arm in the stored position where the tablet arm when 1108.2 of the International Building Code shall have a
raised manually to vertical position in one motion auto- maximum slope of one unit vertical in 12 units horizontal
matically returns to the stored position by force of grav- (8-percent slope). The slope of other ramped aisles shall
ity. not exceed one unit vertical in 8 units horizontal (12.5-per-
[BE] 1029.13.2.1 Dual access. For rows of seating cent slope).
served by aisles or doorways at both ends, there shall [BE] 1029.14.1.1 Cross slope. The slope measured
be not more than 100 seats per row. The minimum clear perpendicular to the direction of travel of a ramped
width of 12 inches (305 mm) between rows shall be aisle shall not be steeper than one unit vertical in 48
increased by 0.3 inch (7.6 mm) for every additional seat units horizontal (2-percent slope).
beyond 14 seats where seats have backrests or beyond [BE] 1029.14.1.2 Landings. Ramped aisles shall have
21 where seats are without backrests. The minimum landings in accordance with Sections 1012.6 through
clear width is not required to exceed 22 inches (559
1012.6.5. Landings for ramped aisles shall be permitted
mm). to overlap required aisles or cross aisles.
Exception: For smoke-protected or open-air assem-
bly seating, the row length limits for a 12-inch-wide
[BE] TABLE 1029.13.2.1
SMOKE-PROTECTED OR OPEN-AIR ASSEMBLY AISLE ACCESSWAYS
MAXIMUM NUMBER OF SEATS PER ROW PERMITTED TO
TOTAL NUMBER OF SEATS HAVE A MINIMUM 12-INCH CLEAR WIDTH AISLE ACCESSWAY
IN THE SMOKE-PROTECTED OR Aisle or doorway at both ends of row Aisle or doorway at one end of row only
OPEN-AIR ASSEMBLY SEATING
Seats with backrests Seats without backrests Seats with backrests Seats without backrests
Less than 4,000 14 21 7 10
4,000 15 22 7 10
7,000 16 23 8 11
10,000 17 24 8 11
13,000 18 25 9 12
16,000 19 26 9 12
19,000 20 27 10 13
22,000 and greater 21 28 11 14
For SI: 1 inch = 25.4 mm.

2018 INTERNATIONAL FIRE CODE ® 193
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