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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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Dominant Portion

November 28, 2018


I understand the definition of "Dominant Portion" in BOMA is the inside finished surface of the external permanent wall of the building, either wall or glass, whichever height is more than 50% compare with the floor to ceiling height. This particular building we are working for is using curtain wall instead of the regular wall. There is an opinion from the consultant team say that we can't measure the floor area from the curtain wall as it is not directly intersect with the floor. Please advise.

Thank you.

David Fingret
Extreme Measures Inc.
November 28, 2018

Hi Lusi,

Is the exterior wall sloped? Do you have any plans or images you could share? Please send to mail@xmeasures.com.


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