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Every portion of every building in which are installed seats, tables, merchandise, equipment, or
similar materials shall be provided with aisles leading to an exit.
Every aisle shall be not less than 800 millimeters wide if serving only one side, and not less than
1 meter wide if serving both sides. Such minimum width shall be measured at the point farthest from an
exit, cross aisle, or foyer and shall be increased by 30 millimeters for every meter in length towards the
exit, cross aisle or foyer.
Side aisles shall not be less than 1.10 meters in width.
(2) Exit Distance
In areas occupied by seats and Groups H and I Occupancies without seats, the line of travel to an
exit door by an aisle shall be not more than 45.00 meters. With standard spacing, as specified in this
Code, aisles shall be so located that there will be not more than seven seats between the wall and an aisle
and not more than fourteen seats between aisles. The number of seats between aisles may be increased
to 30 where exist doors are provided along each side aisle of the row of seats at the rate of one pair of
exit doors for every five rows of seats, provided further that the distance between seats back to back is at
least one meter. Such exit doors shall provide a minimum clear width of 1.70 meters.
(3) Cross Aisles
Aisles shall terminate in a cross aisle, foyer, or exit. The width of the cross aisle shall be not less
than the sum of the required width of the widest aisle plus fifty percent of the total required width of the
remaining aisle leading thereto. In Groups C, H and E Occupancies, aisles shall not be provided a dead
end greater than 6.00 meters in length.
Vomitories connecting the foyer or main exit with the cross aisles shall have a total width not
less than the sum of the required width of the widest aisles leading thereto plus fifty percent of the total
required width of the remaining aisles leading thereto.
The slope portion of aisles shall not exceed a fall of 1 in 8.
(m) Seats (1) Seat Spacing
With standard seating, the spacing of rows of seats from back-to-back shall be not less than 840
millimeters. With continental seating, the spacing of rows of unoccupied seats shall provide a clear
width measure horizontally, as follows: 450 millimeters clear for rows of 18 seats or less; 500
millimeters clear for rows of 35 seats or less; 525 millimeters clear for rows of 45 seats or less; and 550
millimeters clear for rows of 46 seats or more.
The width of any seat shall be not less than 450 millimeters.
(n) Reviewing Stands, Grandstands, and Bleachers
(1) Height of Stands
Stands made of combustible framing shall be limited to 11 rows or 2.70 meters in height.
(2) Design Requirements
The minimum unit live load for reviewing stands, grandstands, and bleachers shall be 500
kilograms per square meter of horizontal projection for the structures as a whole. Seat and footboards
shall be 180 kilograms per linear meter. Th...
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- Fall '12
- Building code, Building officials