36 C.F.R. § 910.60 Gross floor area.
Title 36 - Parks, Forests, and Public Property
Gross floor area is defined in section 1201, Zoning Regulations of the District of Columbia and generally means the sum of the gross horizontal areas of the several floors from the ground floor up of all buildings of a development occurring on a lot. Gross floor area shall be measured from the exterior faces of exterior walls and from the center line of walls separating two buildings.
Title 36: Parks, Forests, and Public Property
PART 910—GENERAL GUIDELINES AND UNIFORM STANDARDS FOR URBAN PLANNING AND DESIGN OF DEVELOPMENT WITHIN THE PENNSYLVANIA AVENUE DEVELOPMENT AREA
Subpart D—Glossary of Terms
§ 910.60 Gross floor area.