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ARE PA - Building Efficiency

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Gross Building Area
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Includes: Exterior walls and everything within
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Created by
Yu-Chen_Zhang
Terms in this set (20)
Gross Building Area
Includes: Exterior walls and everything within
Gross Area (for code purposes not zoning)
Includes: Everything within exterior walls (mezzanines, interstitial spaces such as a mech floor, attics, garage, covered porch)
Excludes: Exterior walls
Net Assignable Area
Includes: Interior walls + columns + projections
Excludes: Exterior walls, vertical penetrations, core, service areas, primary circulation, secondary circulation
Usable Area (Departmental Gross Area)
Includes: Interior walls + columns + projections + secondary circulation
Excludes: Exterior walls, vertical penetrations, core, service areas, primary circulation,
Rentable Area
Includes: Usable area + Building core + Service + Primary Circulation
Excludes: Exterior walls, vertical penetrations
Overall Building Efficiency
Net Assignable area/ Building Gross area

Between 50% for a building with many small rooms and a lot of circulation and up to 90% for warehouses
Base Building Efficiency
Useable area / Building Gross area

Usually about 80%
R/U Ratio (loss factor)
Rentable Area/ Usable Area
Interior Layout Efficiency
Net Assignable area / Usable area.
Building Costs
All costs of construction within 5 feet of building line
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