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The building was originally a symbol of hope in a country devastated by the Depression, as well as a work of accomplishment by newer immigrants. [248] The writer Benjamin Flowers states that the Empire State was "a building intended to celebrate a new America, built by men (both clients and construction workers) who were themselves new Americans."
[29] [13] Furthermore, the tower contained fire-suppression and communications systems for emergency use, which were powered by diesel generators. [151] [167] If there was a fire in one section of the building, the building's smoke-detection system would close off the fresh-air intake openings in that section, discharging smoke outdoors. [151]
Although the South Tower was struck lower than the North Tower, thus affecting more floors, a smaller number (fewer than 700) were killed instantly or trapped. [198] At 9:59 a.m., the South Tower collapsed after burning for approximately 56 minutes. The fire caused steel structural elements, already weakened from the plane's impact, to fail.
The South Tower on fire. Almost all the deaths in the Twin Towers occurred in the zones above the points of aircraft impact. As the North Tower had been struck almost directly midway into the structure, the three main stairways (A, B, and C) in the tower core were all damaged or blocked by debris preventing escape to lower floors.
The original World Trade Center in March 2001. The tower on the left, with the antenna spire, was 1 WTC.The tower on the right was 2 WTC. The original World Trade Center, which featured the landmark Twin Towers (1 WTC and 2 WTC), was a building complex in the Financial District in Lower Manhattan, New York City. 1 and 2 World Trade Center – the North and South Tower – stood at 417 meters ...
Early skyscrapers emerged in the United States as a result of economic growth, the financial organization of American businesses, and the intensive use of land. [9] New York City was one of the centers of early skyscraper construction and had a history as a key seaport located on the small island of Manhattan, on the east coast of the U.S. [10] As a consequence of its colonial history and city ...
The original One World Trade Center (also known as the North Tower, Tower 1, Building One, or 1 WTC) was one of the Twin Towers of the original World Trade Center complex in New York City. It was completed in 1972, stood at a height of 1,368 feet (417 m), and was the tallest building in the world until 1973, when surpassed by the Sears Tower in ...
In 2007, Tishman Construction Corporation of New York completed a row of steel columns at the perimeter of the construction site. Two tower crane bases were erected, each base containing a functioning luffing-jib tower crane. By the end of 2007, the tower's footings and foundations were nearly complete. [10]