Base building element or restricted area that is located inside the dominant portion of a building on the outer wall and that prevents the use of the floor area for furniture, equipment, circulation or other occupant function. (ASTM Derived from Building Projection)
DISCUSSION?The intent is to measure and exclude areas from a floor that occupants cannot use. Perimeter encroachments include but are not limited to:
?building projections such as convector, baseboard heating unit, radiator, or building element that is located in the interior of a building and adjacent to a perimeter building wall that prevents the use of that space for furniture, equipment, circulation or other functions (ASTM E 631),
?horizontal floor area between adjacent encroachments where such area is 12? (304.8 mm) or less (such as the distance between a perimeter column and adjacent curtain wall HVAC distribution device),
?structural columns located on the perimeter of the building or within 12? (304.8 mm) or less of the inside finished surface of the perimeter wall.
A Unified Approach for Measuring Office Space | For Use in Facility and Property Management : Copyright 2007. Building Owners and Managers Association International and International Facility Management Association. All rights reserved. ISBN # 1-883176-73-5