Each tenant space and the covered mall
building shall be provided with means of egress as
required by this section and this code. Where there is a conflict between the
requirements of this code and the requirements of this section, the
requirements of this section shall apply.
402.4.1
Determination of occupant
load. The
occupant load permitted in any individual
tenant space in a
covered mall building shall be determined as
required by this code.
Means of egress requirements for
individual tenant spaces shall be based on the
occupant load
thus determined.
402.4.1.1
Occupant
formula. In determining required
means of egress of the
mall, the number of occupants for whom
means of egress are to
be provided shall be based on gross leasable area of the
covered mall
building (excluding
anchor buildings) and the
occupant load factor as determined by the following equation.
|
OLF = (0.00007)
(GLA) + 25 |
(Equation 4-1) |
where:
OLF = The occupant load
factor (square feet per person).
GLA = The gross leasable area (square
feet).
Exception: Tenant spaces attached to a
covered mall building but with a means of
egress system that is totally independent of the covered mall
building shall not be considered as gross leasable area for
determining the required means of egress for the
covered mall building.
402.4.1.2
OLF range. The
occupant load factor (OLF) is not required to
be less than 30 and shall not exceed 50.
402.4.1.3
Anchor buildings. The
occupant load of anchor buildings opening
into the mall shall not be included in computing the total number of occupants
for the mall.
402.4.1.4
Food
courts. The occupant load of a food court shall be
determined in accordance with Section 1004. For the purposes of determining the
means of egress requirements for the mall, the food court
occupant load shall be added to the occupant
load of the covered mall building as calculated
above.
402.4.2
Number of means of egress. Wherever the distance of travel to the mall
from any location within a tenant space used by persons other than employees
exceeds 75 feet (22 860 mm) or the tenant space has an occupant
load of 50 or more, not less than two means of egress
shall be provided.
402.4.3
Arrangements of means of egress. Assembly occupancies with an
occupant load of 500 or more shall be so located in the
covered mall building that their entrance will be immediately
adjacent to a principal entrance to the mall and shall have not less than
one-half of their required
means of egress opening directly to
the exterior of the
covered mall building.
402.4.3.1
Anchor building means of
egress. Required means of egress for anchor
buildings shall be provided independently from the mall means
of egress system. The occupant load of anchor
buildings opening into the mall shall not be included in determining
means of egress requirements for the mall. The path of egress
travel of malls shall not exit through anchor buildings. Malls terminating at
an anchor building where no other means of
egress has been provided shall be considered as a dead-end
mall.
402.4.4
Distance to exits. Within each individual tenant space in a
covered mall building, the maximum distance of travel from any
point to an
exit or entrance to the mall shall not exceed 200
feet (60 960 mm).
The maximum distance of travel from any point within a mall
to an exit shall not exceed 200 feet (60 960 mm).
402.4.5
Access to
exits. Where more than one
exit is required, they shall
be so arranged that it is possible to travel in either direction from any point
in a mall to separate
exits. The minimum width of an
exit passageway or
corridor from a mall shall
be 66 inches (1676 mm).
Exception: Dead ends not exceeding a length
equal to twice the width of the mall measured at the narrowest location within
the dead-end portion of the mall.
402.4.5.1
Exit passageways.
Where exit passageways provide a secondary means of
egress from a tenant space, doorways to the exit passageway shall be
protected by 1-hour fire door assemblies that are self- or
automatic- closing by smoke detection in accordance with Section
715.4.8.3.
402.4.6
Service areas fronting on exit passageways. Mechanical rooms,
electrical rooms, building service areas and service elevators are permitted to
open directly into exit
passageways, provided
the exit passageway is separated from such rooms with not less than 1-hour
fire barriers constructed in accordance with Section 707 or
horizontal assemblies constructed in accordance with Section
712, or both. The minimum fire protection rating of openings
in the fire barriers shall be 1 hour.
