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Title: Seattle Times 1993: Twin Towers Engineered To Withstand Jet Collision
Source:
Seattle Times
URL Source: http://community.seattletimes.nwsou ... ve/?date=19930227&slug=1687698
Published: Feb 27, 1993
Author: Eric Naider
Post Date: 2015-12-26 23:24:28 by Operation 40
Keywords: 911, fraud, truth
Views: 3451
Comments: 19
Engineers had to consider every peril they could imagine when they designed the World Trade Center three decades ago because, at the time, the twin towers were of unprecedented size for structures made of steel and glass. "We looked at every possible thing we could think of that could happen to the buildings, even to the extent of an airplane hitting the side," said John Skilling, head structural engineer. "However, back in those days people didn't think about terrorists very much." Skilling, based in Seattle, is among the world's top structural engineers. He is responsible for much of Seattle's downtown skyline and for several of the world's tallest structures, including the Trade Center. Concerned because of a case where an airplane hit the Empire State Building, Skilling's people did an analysis that showed the towers would withstand the impact of a Boeing 707. "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," he said. "The building structure would still be there." Skilling - a recognized expert in tall buildings - doesn't think a single 200-pound car bomb would topple or do major structural damage to a Trade Center tower. The supporting columns are closely spaced and even if several were disabled, the others would carry the load. "However," he added, "I'm not saying that properly applied explosives - shaped explosives - of that magnitude could not do a tremendous amount of damage." He took note of the fact that smoke and fire spread throughout the building yesterday. He said that is possibly because the pressurizing system that stops the spread of smoke didn't work when the electric power went off. Skilling, 72, was not involved in the design of the building mechanics. Although Skilling is not an explosives expert, he says there are people who do know enough about building demolition to bring a structure like the Trade Center down. "I would imagine that if you took the top expert in that type of work and gave him the assignment of bringing these buildings down with explosives, I would bet that he could do it." https://www.reddit.com/r/conspiracy/comments/3yb6iz/the_twin_towers_were_designed_to_survive_jet/ They should of wrapped the structural columns in paper passports since you know... they are apparently jet fuel fire resistant. NYC WTC 'designed to withstand multiple airliner impacts' Frank De Martini construction boss Nov 22, 2008 Frank De Martini WTC architect explains it would resist jetliner impacts At the time the Twin Towers were built, the design approach of moving the support columns to the perimeter and the core, thereby creating large expanses of unobstructed floor space, was relatively new, and unique for a skyscraper. However, that approach is commonplace in contemporary skyscrapers. Frank Demartini's Statement 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. 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. Demartini, who had an office on the 88th floor of the North Tower, has been missing since the 9/11/01 attack, having remained in the North Tower to assist in the evacuation. 6 Demartini had first worked at World Trade Center when Leslie E. Robertson Associates hired him to assess damage from the truck bombing in 1993. LINK Like All Skyscrapers, the Twin Towers Were Over-Engineered One aspect of engineering that is not widely understood is that structures are over-engineered as a matter of standard practice. 7 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 1964 white paper cited above, a Tower would still be able to withstand a 100-mile-per-hour wind after all the perimeter columns on one face and some of the columns on each adjacent face had been cut. 8 Also, John Skilling is cited by the Engineering News Record for the claim that "live loads on these [perimeter] columns can be increased more than 2000% before failure occurs."
http://community.seattletimes.nwsource.com/archive/?date=19930227&slug=1687698 
1-800-GOF*YOURSELF 2 points 1 hour ago
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Begin Trace Mode for Comment # 10.
#3. To: Operation 40 (#0)
Apparently the Seattle Times was wrong.
They were correct. The towers survived the collision. Because they survived, 15,000 people successfully evacuated the two towers.
They were correct. The towers survived the collision. The towers survived the collision. Not for a long time. would you have preferred the people stayed in the building and confidently sent out for pizza to prove your stupid point instead of scurrying out of the building? You're nuts.
Correct. They survived the collision but not the fire. The calculations were based on a collision-only. They never took into account the effects of an extended 1800 degree jet fuel fire.
They made an effort to deny the legitimate consequeses of anything that would forseeably happen as a predictable result of that collision. Why?
#17. To: rlk (#10)
In any hypothetical, you must define the parameters. The engineers were asked to predict the survivability of the WTC if hit by: a) a 707 They were NOT asked about a 767, fully fueled, and flying at 600 mph. Nor did they have the capability to predict the effects of a jet fuel fire. And even if they did, no fireproofing systems were available at the time to control the effects of such fires.
Top • Page Up • Full Thread • Page Down • Bottom/LatestSeattle Times 1993: Twin Towers Engineered To Withstand Jet Collision
#6. To: rlk (#3)
"Apparently the Seattle Times was wrong."
#8. To: misterwhite (#6)
(Edited)
"Apparently the Seattle Times was wrong."
#9. To: rlk (#8)
"The towers survived the collision. Not for a long time."
#10. To: misterwhite (#9)
(Edited)
They never took into account the effects of an extended 1800 degree jet fuel fire.
Replies to Comment # 10. "They made an effort to deny the legitimate consequeses of anything that would forseeably happen as a predictable result of that collision. Why?"
b) lost in the fog and low on fuel
c) Flying at landing speed (180 mph)
End Trace Mode for Comment # 10.
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