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911-research.info | Prawda oder wie schnell die Wahrheit geopfert wird

Rettungskräfte | Ingenieure | NYFD

Aussagen von Ingenieuren beim WTC

Aussagen von Ingenieuren belegen die statischen Belastungsgrenzen

Es gibt einige Aussagen von Ingenieuren, die am Bau des WTC gearbeitet haben, die nahelegen, dass diese Aussagen über die Widerstandsfähigkeit der Türme zutreffen sein müssen.

Our analysis indicated the biggest problem would be the fact that all the fuel (from the airplane) would dump into the building. There would be a horrendous fire. A lot of people would be killed, ... The building structure would still be there."
John Skilling head structural engineer for the World Trade Center, 1993

The buildings have been investigated and found to be safe in an assumed collision with a large jet airliner (Boeing 707) traveling at 600 miles per hour. Analysis indicates that such collision would result in only local damage which could not cause collapse or substantial damage to the building and would not endanger the lives and safety of occupants not in the immediate area of impact."
White Paper on contruction of WTC released 1964. City in the Sky, Times Books ..., , page 131

The building was designed to have a fully loaded 707 crash into it. That was the largest plane at the time. I believe that the building probably could sustain multiple impacts of jetliners because this structure is like the mosquito netting on your screen door -- this intense grid -- and the jet plane is just a pencil puncturing that screen netting. It really does nothing to the screen netting. ."
Frank A. Demartini, on-site construction manager for the World Trade Center, spoke of the resilience of the towers in an interview recorded on January 25, 2001.

loads on these [perimeter] columns can be increased more than 2000% before failure occurs."
John Skilling, 'How Columns Will Be Designed for 110-Story Buildings', ENR(Engeneering News Record), 4/2/1964

One aspect of engineering that is not widely understood is that structures are over-engineered as a matter of standard practice. Steel structures like bridges and buildings are typically designed to withstand five times anticipated static loads and 3 times anticipated dynamic loads. The anticipated loads are the largest ones expected during the life of the structure, like the worst hurricane or earthquake occurring while the floors are packed with standing-room-only crowds. Given that September 11th was not a windy day, and that there were not throngs of people in the upper floors, the critical load ratio was probably well over 10, meaning that more than nine-tenths of the columns at the same level would have to fail before the weight of the top could have overcome the support capacity of the remaining columns.. There is evidence that the Twin Towers were designed with an even greater measure of reserve strength than typical large buildings. According to the calculations of engineers who worked on the Towers' design, all the columns on one side of a Tower could be cut, as well as the two corners and some of the columns on each adjacent side, and the building would still be strong enough to withstand a 100-mile-per-hour wind."
Last modified Sun, 11 Nov 2007 20:13:18 +0100 © - 2020 911-research.info
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