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Skyscrapers

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by

Dillon Schneider

on 14 February 2013

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Transcript of Skyscrapers

Skyscrapers -Dillon Schneider In the 1930s the Empire State Building was built in just 410 days, 80 years now this speedy record hasn't been broken to this day. "Skyscraper" was originally a nautical term, referring to a small triangular sail on the top of the ship. The Empire State Building in New York was the first building to have over 100 floors and was the tallest building in the world from 1931 until 1972. What about natural disasters? The Great San Francisco Quake and Fire:
Recorded 3,000 deaths
$400M (equivalent to $8B today.)
300 commercial and residential buildings were damaged or leveled completely. What about today's natural disasters? The least expensive natural disaster that destroyed at least 5, 30-story or more buildings was in at a cost of $29B from the Sichuan Quake in China. The most expensive natural disaster that destroyed, 30-story or more buildings was in at a cost of $235B which was the earthquake and tsunami in Japan in 2011 Mass dampeners help support the massive structures that fill our cities today. The Transamerica Pyramid Building in San Francisco is an example of a "outrigger truss mass dampener" The World Trade Center Buildings are perfect examples of "Core Truss Mass Dampeners" Dubai's Burj Khalifa building stands 2,717ft. tall, an engineering marvel
From some slight engineering errors the building now stands 2ft. shorter than the original height just 3 years after being built What about high Winds? How do skyscrapers support all the weight? Engineers cluster together steel columns and beams in the core, along with others on the buildings edge.
Even for extreme Skyscrapers engineers must blend a perfect concrete mixture to ensure that the building will stand the test of time
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