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Floor plan pentagon building layout.
Immediately after the pearl harbor attack a fourth floor was added to the plan and later a fifth.
Steel was in short supply and needed for the war effort.
The pentagon is the headquarters building of the united states department of defense as a symbol of the u s.
Mcshain company of philadelphia.
Today it still ranks as the 13th largest by area.
The rings are connected by 10 spoke like corridors.
Military the phrase the pentagon is also often used as a metonym for the department of defense and its leadership.
The architect was george e.
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The configuration was reminiscent of the star shaped forts built during the gunpowder age.
The pentagon is a five story building composed of five rings a through e built around a center courtyard.
The pentagon is the largest low rise office building in the world and its renovation was the most complex in contemporary history.
In october 1941 the president approved somervell s plans and construction proceeded at a very rapid pace.
To reduce the amount of steel used architects incorporated ramps rather than elevators in the building.
Located in arlington county virginia across the potomac river from washington d c the building was designed by american architect george bergstrom and built by.
The 10 corridors result from the fact that each of the five a ring corner joints called apexes have two corridors radiating out to the e ring the outermost ring.
Bergstrom and the prime contractor was the john t.
When it was completed in 1943 its 6 600 000 square feet 3 705 793 square feet of usable office space more than three times the available area in the empire state building made it the world s largest building by floor area.