SECTION 704 EXTERIOR WALLS
704.8
Allowable area of openings. The maximum area of unprotected
or protected openings permitted in an exterior wall in any
story shall not exceed the values set forth in Table
704.8. Where both unprotected and protected openings are
located in the exterior wall in any story, the total area
of the openings shall comply with the following formula:
(Equation
7-2)
where:
A = Actual area of protected openings, or the equivalent
area of protected openings, Ae (see
Section 704.7).
a = Allowable area of protected openings.
Au = Actual area of unprotected openings.
au = Allowable area of unprotected openings.
704.8.1
Automatic sprinkler system. In buildings equipped throughout
with an automatic sprinkler system in accordance with Section
903.3.1.1, the maximum allowable area of unprotected
openings in occupancies other than Groups H -1, H - 2 and
H - 3 shall be the same as the tabulated limitations for
protected openings.
704.8.2
First story. In occupancies other than Group H, unlimited
unprotected openings are permitted in the exterior walls
of the first story above grade facing a street that have
a fire separation distance of greater than 15 feet (4572
mm) or facing an unoccupied space. The unoccupied space
shall be on the same lot or dedicated for public use, shall
not be less than 30 feet (9144 mm) in width and shall have
access from a street by a posted fire lane in accordance
with the International Fire Code.
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