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This help desk is a free resource intended for discussion purposes only. Neither BOMA, its chapters, affiliates, or Extreme Measures Inc.® are responsible for the information, comments or opinions expressed herein. For complete information, refer to the official publications of the standards themselves.

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Space Type Chart Definitions

Annie Leung
June 9, 2017

In the Gross Area of a Building Standard (ANSI/BOMA Z65.3-2009), are there recommended definitions for the following terms as they do not appear in the definition section.
Total Level Area (page 4, 5)
Colonnade (page 6)
Parking On-Grade (page 6)
Unexcavated Space (page 6)

David Fingret
Extreme Measures Inc.
June 12, 2017

Hi Annie,

There are no definitions, but I can explain what each is - these are not official definitions:

Total Level Area: This is the total area of each floor for both CGA and EGA before deductions are made.

Colonnade: Also known as a promenade or covered gallery, it is a roofed area extending along the wall of a building which is supported by arches, columns, or other structural components

Parking On-Grade: Single level surface parking with no structural component.

Unexcavated Space: An area of a building or anywhere within its property line that has not been improved in any way to provide any particular function.

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