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Dominant Surface

Nicholas Stewart
RANK Incorporated
October 18, 2022


I am measuring an office space for a tenant and am a bit confused about where my measurement should go to. I know the rules state to measure to the dominant portion, (whichever surface covers over 50% of the surface). In my case, the glass system is 5'8" in height, some of the ceilings are at 9' A.F.F., and in some areas of the space there is an open ceiling at 12' A.F.F. Does this mean the glass should be the dominant portion or the inside of the drywall should be the dominant portion on the exterior wall? I am just looking for some clarification. Is there a rule I am missing?

Thanks in advance.

David Fingret
Extreme Measures Inc.
October 19, 2022

Hi Nicholas,

The measure line needs to be adjusted to where the dominant portion is. In your case, the dominant portion is the drywall in some areas, and is the glazing in other areas.


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