Built as the headquarters for an aluminum company, with aluminum walls displaying Alcoa's pride in their material.
One of the most famous skyscrapers of the early postwar period, for its advanced modern architecture.
The structure consists of 2 adjoining slabs with a glass lobby attached to one inside corner.
The aluminum walls are 1/8-inch thick, with a distinctive X design on each spandrel panel.
In addition to being the first skyscraper with an all-aluminum facade, the building originally had all-aluminum ceilings, wiring, and water pipes.
The building is fitted with a unique heating and cooling system in the ceiling; this resulted in no mechanical systems in the outer walls, giving the building an extra 1400 square metres of rentable floor area.
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