Contrary to some claims here that building WTC #7 fell because of structural damage, that is not the theory reported by NIST.

(NIST is the "National Institute of Standards and Technology.")

WTC 7 was not hit by a plane. And although NIST had at one time planned to claim that this building's collapse was partly due to damage inflected by debris from the North Tower's collapse, it ended up not making this claim.

"Other than initiating fires in WTC 7 , NIST says, in its final report, "the damage from the debris from WTC 1 had little effect on initiating the collapse of WTC 7."

Whereas the Twin Towers were unique, for a few hours, in being the only steel framed high rise to collapse without the aid of explosives, WTC 7, according to NIST, was (and still is) unique in being the only steel framed building in which total collapse was induced by fire alone.

This thread is for anyone who wants to intelligently discuss WTC #7

I believe its feasible and logical that the building was destructed purposely to control the destruction that was imminent.

Who cares what they said. Look at what the ASCE said.

Feds: Fire took down building next to twin towers By DEVLIN BARRETT, Associated Press Writer
17 minutes ago Friday 22nd August '08



GAITHERSBURG, Md. - Federal investigators said Thursday they have solved a mystery of the Sept. 11, 2001, attacks: the collapse of World Trade Center building 7, a source of long-running conspiracy theories.



The 47-story trapezoid-shaped building sat north of the World Trade Center towers, across Vesey Street in lower Manhattan in New York. On Sept. 11, it was set on fire by falling debris from the burning towers, but skeptics long have argued that fire and debris alone should not have brought down such a big steel-and-concrete structure.

Scientists with the National Institute of Standards and Technology say their three-year investigation of the collapse determined the demise of WTC 7 was actually the first time in the world a fire caused the total failure of a modern skyscraper.

"The reason for the collapse of World Trade Center 7 is no longer a mystery," said Dr. Shyam Sunder, the lead investigator on the NIST team.

Investigators also concluded that the collapse of the nearby towers broke the city water main, leaving the sprinkler system in the bottom half of the building without water.

The building has been the subject of a wide range of conspiracy theories for the last seven years, partly because the collapse occurred about seven hours after the twin towers came down. That fueled suspicion that someone intentionally blew up the building in a controlled demolition.

Critics like Mike Berger of the group 9/11 Truth said he wasn't buying the government's explanation.

"Their explanation simply isn't sufficient. We're being lied to," he said, arguing that there is other evidence suggesting explosives were used on the building.

Sunder said his team investigated the possibility that an explosion inside the building brought it down, but found there was no large boom or other noise that would have occurred with such a detonation. Investigators also created a giant computer model of the collapse, based partly on news footage from CBS News, that they say shows that internal column failure brought down the building.

Investigators also ruled out the possibility that the collapse was caused by fires from a substantial amount of diesel fuel that was stored in the building, most of it for generators for the city's emergency operations command center.

The 77-page report concluded that the fatal blow to the building came when the 13th floor collapsed, weakening a critical steel support column that led to catastrophic failure.

"When this critical column buckled due to lack of floor supports, it was the first domino in the chain," said Sunder.

The NIST investigators issued more than a dozen building recommendations as a result of their inquiry, most of which repeat earlier recommendations from their investigation into the collapse of the two large towers.

In both instances, investigators concluded that extreme heat caused some steel beams to lose strength, causing further failures throughout the buildings until the entire structure succumbed.

The recommendations include building skyscrapers with stronger connections and framing systems to resist the effects of thermal expansion, and structural systems designed to prevent damage to one part of a building from spreading to other parts.

No one was killed in the collapse of building 7 because it had been fully evacuated. A new, slightly taller World Trade Center 7 opened in 2006.

A spokesman for the leaseholder of the World Trade Center, developer Larry Silverstein, praised the government's work.

"Hopefully this thorough report puts to rest the various 9/11 conspiracy theories, which dishonor the men and women who lost their lives on that terrible day," said Silverstein spokesman Dara McQuillan.

In discussing the findings, the investigator Sunder acknowledged that some may still not be convinced, but insisted the science behind their findings is "incredibly conclusive."

"The public should really recognize the science is really behind what we have said," he said, adding: "The obvious stares you in the face."

and again we have those cursed silent Explosives!

http://www.popularmechanics.com/technology/engineering/4213805

so now,after the trouncing,you trying the WTC7!

And actually the report says there was structural damage but that damage did not initiate the collapse. That is obvious as it didn't collapse when it took the structural damage. The does not mean it wasn't there and that it didn't weaken the structure further.

And how exactly are they going to put explosives in a building that's on fire. Think Mcfly.

You are beginning to look silly now

You know more than the National Institute of Standards and Technology



Time to declare your true interest

Feds: Fire took down building next to twin towers By DEVLIN BARRETT, Associated Press Writer
17 minutes ago Friday 22nd August '08



GAITHERSBURG, Md. - Federal investigators said Thursday they have solved a mystery of the Sept. 11, 2001, attacks: the collapse of World Trade Center building 7, a source of long-running conspiracy theories.



The 47-story trapezoid-shaped building sat north of the World Trade Center towers, across Vesey Street in lower Manhattan in New York. On Sept. 11, it was set on fire by falling debris from the burning towers, but skeptics long have argued that fire and debris alone should not have brought down such a big steel-and-concrete structure.

Scientists with the National Institute of Standards and Technology say their three-year investigation of the collapse determined the demise of WTC 7 was actually the first time in the world a fire caused the total failure of a modern skyscraper.

"The reason for the collapse of World Trade Center 7 is no longer a mystery," said Dr. Shyam Sunder, the lead investigator on the NIST team.

Investigators also concluded that the collapse of the nearby towers broke the city water main, leaving the sprinkler system in the bottom half of the building without water.

The building has been the subject of a wide range of conspiracy theories for the last seven years, partly because the collapse occurred about seven hours after the twin towers came down. That fueled suspicion that someone intentionally blew up the building in a controlled demolition.

Critics like Mike Berger of the group 9/11 Truth said he wasn't buying the government's explanation.

"Their explanation simply isn't sufficient. We're being lied to," he said, arguing that there is other evidence suggesting explosives were used on the building.

Sunder said his team investigated the possibility that an explosion inside the building brought it down, but found there was no large boom or other noise that would have occurred with such a detonation. Investigators also created a giant computer model of the collapse, based partly on news footage from CBS News, that they say shows that internal column failure brought down the building.

Investigators also ruled out the possibility that the collapse was caused by fires from a substantial amount of diesel fuel that was stored in the building, most of it for generators for the city's emergency operations command center.

The 77-page report concluded that the fatal blow to the building came when the 13th floor collapsed, weakening a critical steel support column that led to catastrophic failure.

"When this critical column buckled due to lack of floor supports, it was the first domino in the chain," said Sunder.

The NIST investigators issued more than a dozen building recommendations as a result of their inquiry, most of which repeat earlier recommendations from their investigation into the collapse of the two large towers.

In both instances, investigators concluded that extreme heat caused some steel beams to lose strength, causing further failures throughout the buildings until the entire structure succumbed.

The recommendations include building skyscrapers with stronger connections and framing systems to resist the effects of thermal expansion, and structural systems designed to prevent damage to one part of a building from spreading to other parts.

No one was killed in the collapse of building 7 because it had been fully evacuated. A new, slightly taller World Trade Center 7 opened in 2006.

A spokesman for the leaseholder of the World Trade Center, developer Larry Silverstein, praised the government's work.

"Hopefully this thorough report puts to rest the various 9/11 conspiracy theories, which dishonor the men and women who lost their lives on that terrible day," said Silverstein spokesman Dara McQuillan.

In discussing the findings, the investigator Sunder acknowledged that some may still not be convinced, but insisted the science behind their findings is "incredibly conclusive."

"The public should really recognize the science is really behind what we have said," he said, adding: "The obvious stares you in the face."

and again we have those cursed silent Explosives!

http://www.popularmechanics.com/technology/engineering/4213805

Read it and weep!
This is from the NIST-Report!

Now fees up to what your interest and Innuendo are!

Fireproof,Silent Invisible Explosives from Area 51!

explosives already there for some other reason that i cant or wont speculate about,,,

And how would they still be functional after being in a fire for 7 hours? How would no cabling be destroyed? No reciever destroyed? Also if any of those were destroyed the colapse wouldn't happen properly if any would even go off at all.

so why didn't they laser beam WTC 7 instead of blowing it up?

It states clearly in the report that the damage caused by wtc1 to wtc7 had no bearing on the collapse of wtc7...

That puts paid to the resident engineers on here




National Institute of Standards and Technology

No it says based on their analysis that it would have still colapsed without the structural damage. Not that it didn't contribute. That the fire could have still brought it down without the structural damage. Than does not mean that it had no baring. The time frame etc could have been different.

It also said there were no explosives.

That post was aimed at you in particular, you posted the structural damage on wtc7...of no significance

And? So you are admitting it wasn't caused by a demolition? Fine with me. The structure damage was there and it contributed to the collapse. The fact the it would have eventually colapsed without that added structural damage is fine with me.

I am only quoting from an expert report.

Your an engineer and you said the structural damage contributed to the collapse so that casts doubt on your contribution to this thread