ARE PA - Building Efficiency

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Gross Building Area

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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,

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.

All costs of construction within 5 feet of building line