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SECTION 509 SPECIAL PROVISIONS
509.7 Open parking garage
beneath Groups A, I, B, M and R. Open parking garages
constructed under Groups A, I, B, M and R shall not exceed
the height and area limitations permitted under Section
406.3. The height and area of the portion of the building
above the open parking garage shall not exceed the limitations
in Section 503 for the upper occupancy.
The height, in both feet and stories, of the portion of the
building above the open parking garage shall be measured from
grade plane and shall include both the open parking garage
and the portion of the building above the parking garage.
509.7.1 Fire separation.
Fire barriers constructed in accordance with Section
706 or horizontal assemblies constructed in accordance
with Section 711 between the parking
occupancy and the upper occupancy shall correspond to the
required fire-resistance rating prescribed in Table
508.3.3 for the uses involved. The type of construction
shall apply to each occupancy individually, except that
structural members, including main bracing within the open
parking structure, which is necessary to support the upper
occupancy, shall be protected with the more restrictive
fire-resistance-rated assemblies of the groups involved
as shown in Table 601. Means
of egress for the upper occupancy shall conform to Chapter
10 and shall be separated from the parking occupancy by
fire barriers having at least a 2-hour fire-resistance rating
as required by Section 706 with self-closing
doors complying with Section 715 or
horizontal assemblies having at least a 2-hour fire-resistance
rating as required by Section 711,
with self-closing doors complying with Section
715. Means of egress from the open parking garage shall
comply with Section 406.3.
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