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The Pentagon—a building, institution,
and symbol—was conceived at the request of Brigadier General Brehon B.
Sommervell, Chief of the Construction Division of the Office of the
Quartermaster General, on a weekend in mid-July 1941. The purpose was to
provide a temporary solution to the War Department’s critical shortage
of space. The groundbreaking ceremony took place on September 11,
1941. The building was dedicated on January 15, 1943, nearly 16 months
to the day after the groundbreaking.
Prime contract awarded 11 August 1941 Mechanical engineering contract awarded 3 September 1941 Construction began 11 September 1941 Grading contract awarded 24 September 1941 First occupants move in 29 April 1942 Construction completed 15 January 1943 Total Land Area (acres) 583 Government Owned (acres) 296 Purchased or condemned (acres) 287 Cost $2,245,000 Area covered by Pentagon bldg (acres) 29 Area of center court (acres) 5 Area of heating and refrigeration plant (acres) 1 Area of sewage structures (acres) 1 Access highways built (miles) 30 Overpasses and bridges built 21 Parking space (acres) 67 Capacity (vehicles) 8,770 Cost of building $49,600,000 Total cost of project (including outside facilities) $83,000,000 Gross floor area (sq. ft.) 6,636,360 Net space for offices, concessions and storage (sq. ft.) 3,705,793 Cubic contents (cu. ft.) 77,015,000 Length of each outer wall (ft.) 921 Height of building (ft.) 77' 3.5" Number of floors, plus mezzanine and basement 5 Total length of corridors (miles) 17.5 Number of: Stairways 131 Escalators 19 Elevators 13 Fire hose cabinets 672 Rest Rooms 284 Fixtures 4,900 Drinking fountains 691 Electric clock outlets 7,000 Clocks installed 4,200 Light fixtures 16,250 Lamp replacements (daily) 250 Windows 7,754 Glass area (equals 7.1 acres)(sq. ft.) 309,276
updated: 25-Oct-2000
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