Space / Space Inventory
Internal Gross Area (Concept)
The internal gross area of a floor is measured to the inside surface of the external building wall. Archibus uses the internal gross area as the basis to derive all floor area calculations; therefore, you must represent internal gross area in each of your floor drawings.
How to Measure
The internal gross area of a floor is measured to the inside finished surface of the dominant portion of the permanent outer building walls
See Also