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911
See other 911 Articles

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: 2926
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."
http://community.seattletimes.nwsource.com/archive/?date=19930227&slug=1687698

https://www.reddit.com/r/conspiracy/comments/3yb6iz/the_twin_towers_were_designed_to_survive_jet/

1-800-GOF*YOURSELF 2 points 1 hour ago

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." (1 image)

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Begin Trace Mode for Comment # 7.

#3. To: Operation 40 (#0)

Seattle Times 1993: Twin Towers Engineered To Withstand Jet Collision

Apparently the Seattle Times was wrong.

rlk  posted on  2015-12-27   1:56:20 ET  Reply   Untrace   Trace   Private Reply  


#7. To: rlk, Operation 40 (#3)

Seattle Times 1993: Twin Towers Engineered To Withstand Jet Collision

Apparently the Seattle Times was wrong.

That is understating it. They was wrong twice.

707.200 is not a 767.200 and you can fudge the numbers to make them close but they were not.

I truly am sick of the the 911 truthers. Nothing has panned out and all they do is hurt those that died that day because of terrorist attacks.

911 Truthers are just like Man Global warmest. They just keep making shit up to fit their desires. After awhile you would think that everything they slung up at the wall did stick and they would go away in time. But no they just are mentally disturbed.

Justified  posted on  2015-12-27   11:57:39 ET  Reply   Untrace   Trace   Private Reply  


Replies to Comment # 7.

#11. To: Justified (#7)

I truly am sick of the the 911 truthers.

It's simple derangement. They need this to justify their hate/anger towards... I don't know. But. They truly are detached from reality.

ironalek  posted on  2015-12-28 05:54:29 ET  Reply   Untrace   Trace   Private Reply  


#16. To: Justified (#7) (Edited)

I truly am sick of the the 911 truthers. Nothing has panned out and all they do is hurt those that died that day because of terrorist attacks.

My, how harsh. I'm kind of sick of people that don't give a damn that their country has been looted and their liberties stolen by a bunch of lying scumbags. So there. How did you feel about Galileo, BTW? Bet ya would have flogged him like the sycophant you are.

all they do is hurt those that died that day because of terrorist attacks.

Here's a challenge, sport- watch this little video about 4 wives of 911 victims. You can hear what they think straight from their mouths.

I DARE YOU

Then stop spreading dirty ignorant lies. OK?

DOES THAT MAKE IT CLEAR TO YOU THAT YOU HAVE NO IDEA WHAT YOU'RE TALKING ABOUT?

Operation 40  posted on  2015-12-28 08:08:38 ET  Reply   Untrace   Trace   Private Reply  


End Trace Mode for Comment # 7.

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