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Glossary Term Defined

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Dominant Portion

BOMA OFFICE STANDARD 1989

The portion of the inside finished surface of the permanent outer 2) building wall which is 50% or more of the vertical floor-to-ceiling dimension measured at the dominant portion. If there is no dominant portion, or if the dominant portion is not vertical, the measurement for area shall be to the inside finished surface of the permanent outer building wall where it intersects the finished floor.

That portion of the inside finished surface of a vertical exterior enclosure (or a vertical enclosure at a void) that constitutes 50% or more of the vertical dimension between the finished surface of the floor and the finished surface of the ceiling.

AIR INDUSTRIAL BUILDING STANDARD

The “Dominant Portion” shall mean that portion of the Exterior Surface within any one vertical plane which is both (i) structural in character and (ii) whose total surface area contains the highest percentage of the total Exterior Surface area of that one Exterior Wall. By way of illustration: (i) if 60% of the Exterior Surface of one Exterior Wall of a building consists of recessed glass storefront falling within a first vertical plane; and (ii) 10% of the same Exterior Surface is structural in character falling within a second vertical plane; and (iii) 30% of the same Exterior Surface is structural in character and falls within a third vertical plane, the 30% of the Exterior Surface which is structural would be the Dominant Portion for the purpose of determining the Exterior Dimensions.

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