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https://science.howstuffworks.com/engineering/structural/wtc1.htm
The World Trade Center towers had an innovative "tube" design, with a perimeter support structure joined to a central core structure with horizontal floor trusses. The final design for the WTC was a group effort, bringing together the work of dozens of architects, structural engineers and managers, led by a few prominent talents.
https://www.wsp.com/en-US/projects/one-world-trade-center
“After 9/11, construction just stopped,” says Ahmad Rahimian, director of building structures at WSP in New York, who led the structural design of One WTC. “The entire engineering and construction community was trying to understand what had happened and see what lessons we could learn to make future buildings better.
https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910105
World Trade Center 1 and 2 Structural System 3.1. Overview of WTC 1 and 2 (WTC Towers) ... WTC 2 was also designed to support an antenna which was never built. The footprint of each tower was a square, about 64 m (210 ft) on a side (approximately an acre), with beveled corners. Internally, each floor was a square, about 63 m
Project Summary. This is a study of the collapse of the 47-story World Trade Center Building 7 (WTC7) at 5:20 P.M. on September 11, 2001. The objective of the study was threefold: (1) Examine the structural response of WTC 7 to fire loads that may have occurred on September 11, 2001; (2) Rule out scenarios that could not have caused the observed collapse; and (3) Identify types of failures and ...
http://ine.uaf.edu/media/92216/wtc7-structural-reevaluation_progress-report_2017-9-7.pdf
A Structural Reevaluation of the Collapse of World Trade Center 7 September 2017 Progress Report ... Purpose of this study 1. World Trade Center Building 7 (WTC 7) was not struck by a plane and yet it collapsed. Why? 2. The National Institute for Standards and Technology (NIST) issued a report in ... New caissons were added to support the ...
https://en.wikipedia.org/wiki/Construction_of_the_World_Trade_Center
The design and construction of the World Trade Center, most centrally its twin towers, involved many other innovative techniques, such as the slurry wall for digging the foundation, and wind tunnel experiments. Construction of the World Trade Center's North Tower began in …
http://www.911research.wtc7.net/wtc/analysis/design.html
John Skilling was the head structural engineer for the World Trade Center. In a 1993 interview, Skilling stated that the Towers were designed to withstand the impact and fires resulting from the collision of a large jetliner such as Boeing 707 or Douglas DC-8.
https://en.wikipedia.org/wiki/World_Trade_Center_%281973%E2%80%932001%29
The original World Trade Center was a large complex of seven buildings in the Financial District of Lower Manhattan, New York City, United States.It opened on April 4, 1973, and was destroyed in 2001 during the September 11 attacks.At the time of their completion, the Twin Towers—the original 1 World Trade Center, at 1,368 feet (417 m); and 2 World Trade Center, at 1,362 feet (415.1 m ...Location: Lower Manhattan, New York City
https://news.stanford.edu/news/2001/december5/wtc-125.html
Dec 05, 2001 · Structural engineer describes collapse of the World Trade Center towers. ... the impact of the jetliners shattered and fractured two-thirds of the support columns on one face of each tower ...
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