Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s)

Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s)


On September 20, 1962, the Port Authority announced the selection of Minoru Yamasaki as lead architect and Emery Roth & Sons as associate architects. Yamasaki devised the plan to incorporate twin towers; Yamasaki’s original plan called for the towers to be 80 stories tall, but to meet the Port Authority’s requirement for 10,000,000 square feet of office space, the buildings would each have to be 110 stories tall.

A major limiting factor in building height is the issue of elevators; the taller the building, the more elevators are needed to service the building, requiring more space-consuming elevator banks. Yamasaki and the engineers decided to use a new system with two “sky lobbies”—floors where people could switch from a large-capacity express elevator to a local elevator that goes to each floor in a section. This system, inspired by the local-express train operation that the New York City Subway system used,[60] allowed the design to stack local elevators within the same elevator shaft. Located on the 44th and 78th floors of each tower, the sky lobbies enabled the elevators to be used efficiently, increasing the amount of usable space on each floor from 62 to 75 percent by reducing the number of elevator shafts. Altogether, the World Trade Center had 95 express and local elevators.

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Historic images of Twin Towers – World Trade Center in 1975

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News

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Historic images of Twin Towers – World Trade Center Construction (1960s and 1970s) / New York Daily News


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