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definitions index
AREA, BUILDING.
The area included
within surrounding exterior walls (or exterior walls and firewalls)
exclusive of vent shafts and courts. Areas of the building
not provided with surrounding walls shall be included in the
building area if such areas are included within the horizontal
projection of the roof or floor above.
BASEMENT.
That portion of a
building that is partly or completely below grade plane (see
“Story above grade plane” in Section 202). A basement
shall be considered as a story above grade plane where the
finished surface of the floor above the basement is:
1. More than
6 feet (1829 mm) above grade plane; or
2. More than
12 feet (3658 mm) above the finished ground level at any
point.
EQUIPMENT
PLATFORM.
An
unoccupied, elevated platform used exclusively for mechanical
systems or industrial process equipment, including the associated
elevated walkways, stairs and ladders necessary to access
the platform (see
Section
505.5).
GRADE PLANE.
A reference plane
representing the average of finished ground level adjoining
the building at exterior walls. Where the finished ground
level slopes away from the exterior walls, the reference plane
shall be established by the lowest points within the area
between the building and the lot line or, where the lot line
is more than 6 feet (1829 mm) from the building, between the
building and a point 6 feet (1829 mm) from the building.
HEIGHT, BUILDING.
The vertical distance
from grade plane to the average height of the highest roof
surface.
HEIGHT, STORY.
The vertical distance
from top to top of two successive finished floor surfaces;
and, for the topmost story, from the top of the floor finish
to the top of the ceiling joists or, where there is not a
ceiling, to the top of the roof rafters.
MEZZANINE.
An intermediate level
or levels between the floor and ceiling of any story and in
accordance with
Section
505.
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