Building Area means the greatest horizontal area of a building within the outside surface of the exterior walls.
Building Square Footage or "BSF" means the square footage of assessable internal living space of a Unit, exclusive of any carports, walkways, garages, overhangs, patios, enclosed patios, detached accessory structure, other structures not used as living space, or any other square footage excluded under Government Code Section 65995 as determined by reference to the Building Permit for such Unit.
Building drain means that part of the lowest horizontal piping of a drainage system which receives the discharge from soil, waste, and other drainage pipes inside the walls of the building and conveys it to the building sewer, beginning five (5) feet (1.5 meters) outside the inner face of the building wall.
Rentable Area of the Premises The amount of square footage set forth in Section 1.01(10).
Planned special exposure means an infrequent exposure to radiation, separate from and in addition to the annual occupational dose limits.