Sunday, July 15, 2007

Proof that WTC 7 was demolished professionally

(This is a summary of the argument presented here, complete with more detailed source links, including Architects and Engineers for 9/11 Truth.)

WTC 7 was the third steel-framed skyscraper that was completely destroyed on 9/11. Unlike the Twin Towers, it was not hit by a plane. Its height was 174 meters, and it had 47 floors. It was located in a block separate from the other WTC buildings, 110 meters from the closest tower. The implosion of WTC 7 is shown below (note the dropping of the penthouse).


Investigations. As this was one of the biggest building disasters in world history, the remains of the skyscraper should have been painstakingly investigated. If the building collapsed in seconds to the ground as a result of fires – as FEMA speculated in 2002 – the significance of the event for building safety, building codes, etc. is enormous. It would have been easy to properly examine the debris from the building, as it landed mostly within its own footprint. This was not done, and the physical research material was quickly removed and destroyed. According to NIST, the governmental agency that is still – well after 6.5 years from the event – trying to come up with a plausible report, “no steel was recovered from WTC 7”. This can be seen as either suspicious or absurd, and I don’t think building disasters are investigated absurdly.

The speed of destruction.
WTC 7 fell into a pile of debris in approximately 6.5 seconds. The corresponding free fall time is 5.95 seconds, while an apple dropped from the roof would have taken 7 seconds to fall to the ground (Kurttila 2005; the exact time varies with the air resistance of the object). The 80 steel support pillars of the building, therefore, did not in practice resist the destruction. However, destroying the support structures throughout the floors of the 174-meter building demanded energy that would have been away from pure kinetic energy; in other words, gravitational destruction of those structures would necessarily have slowed down the collapse. No slowing down required by destruction work can have taken place within the short time it took WTC 7 to collapse. To simplify: the roof came down as if mere air (and not 47 stories) had separated it from the ground. This can only be explained by the removal of structural resistance in a controlled demolition. In controlled demolitions, the roofs of highrises typically reach the ground in a time that is slightly longer than free fall. [1]

The sudden onset and symmetry of the destruction.
WTC 7 dropped suddenly straight down. This means that the 80 support pillars had to give in simultaneously. To believe that random fires on separate floors and damage to one side caused the sudden vertical collapse is to believe in a miracle (as pointed out by professor David Ray Griffin). Moreover, achieving the outcome of a controlled demolition by means of matches and damaging one side of a highrise would mean that companies specialized in controlled demolition would have to start thinking about new business ideas.

Hot debris
. According to NASA’s thermal imaging, the surface temperature of the WTC 7 debris pile exceeded 700 degrees Celcius – five days after the destruction. Residual temperatures like this cannot be explained by fires or gravitational collapse. The latter can only result in a few degrees' increase in temperature.

Molten and vaporized steel.
As in the case of the Twin Towers, molten steel was reportedly found in the remains of WTC 7. Some steel samples that the researchers did manage to examine were also partially vaporized. In a New York Times interview, professor Jonathan Barnett points out that fires cannot explain this. Evidently, not even these samples were kept, and NIST has ignored this finding. Molten steel can be explained by explosives but not by fires, as their temperature simply cannot rise anywhere close to the melting point of steel, let alone the temperature required by vaporization.

Expert statements.
The Dutch demolition expert Danny Jowenko, who owns a demolition firm and has been in the business for 30 years, regards it as certain that WTC 7 was demolished. His view is shared by numerous architects, engineers and other demolition professionals – see Architects and Engineers for 9/11 Truth, http://www.ae911truth.org/, and this page exemplifying people with demolition expertise who question the official account.

The testimony of first responders.
Several rescue personnel have testified to being told that WTC 7 would be brought down.

[1] Another way of looking at this:

1) In a vacuum, an object falls the height of WTC 7 in 5.95 seconds. An object falling in a vacuum does not crush, twist or displace anything – not even air. If WTC 7 had collapsed in 5.95 seconds, not even air (let alone the rest of the building) would have separated its roof from the ground.

2) WTC 7 collapsed into a rubble pile in approximately 6.5 seconds.

3) As an object falling freely does not crush or twist anything, the time available for gravitational crushing or twisting of the building's ~80 steel columns throughout its 47 floors is slightly over 0.5 seconds (6.5 - 5.95 seconds) or, if you like, ~0.01 seconds per floor ( 0.5 / 47).

4) The 0.5 seconds is not enough even in theory for a total gravitational collapse of a 174-meter highrise. Ergo, the structural resistance was removed by means of explosives.

10 comments:

Saad said...

5/17 ON SEP. 2, 1999, USA TOLD ME, USA WOULD USE BIN LADEN on 911 to f**k all Moslims
http://www.youtube.com/watch?v=B1PER0WLvZ0

Michael said...

Wow. This makes the conspiracy theory even more believable. It feels like some people are really looking to start a war or something. Demolition would be different from terrorism and if there were no real terrorists involved they why are we pointing fingers outside the country?

ryanshaunkelly said...

Every part of the official government 9/11 story is a lie.
Every part of the controlled media sold it to the public.

Why do Israel-first dual-nationals demand censorship?

Aaron Glicco said...

While i appreciate the evidence you have you have overlooked a few very very important parts. One, you did NOT include the view of the tower from multiple angles. If you look at it from the south, you will see that the EAST penthouse (top part of the building )_ collapses about 10 seconds before the building falls . ALso, you will see the east side fall First,, then the middle and the west side about 5 seconds after that. THEN, you also left out pics of the aftermath, despite what it looks like, there are photos of it from the AIR showing that it did not just collapse INTO ITSELF. In fact, part of the building fell across a STREET into another building. If it was a controled demo, this wouldnt have happened. The only unexplainable part is the vaporization of metal, but if there was a fire (there was, this caused the collapse) it would have killed the building. THIS expalins the hot temp 5 days later. Ask a firefighter if the aftermath of a fire is still hot 5 days later, they will tell you it is. just a litle info for you . Try the site http://www.debunking911.com/
It PROVES or rather DISPROVES all of these myths, and rumors. THere is no shame in being wrong, esp when a tragedy like this happens and we all try to make sense of things. But you owe it to yourself in order to

Fred Hutchinson said...

I actually never heard of this speculation before. Thanks for doing your research. I think more research needs to be done though before making this conclusion.
Fred Hutchinson | http://www.a-1concrete.com/commercial.html

Strigoi said...

We look at the fire that NIST claims took down WTC building 7 as well as 5 other steel frame high rise fires.

Fire, Steel, & WTC 7:

http://911debunkers.blogspot.com/2012/07/fire-steel-wtc-7.html

Good video. It's also worth noting that NIST itself has addmitted that several of these other buildings burned just as bad or even worse than WTC7.

“There are more similarities than differences between the uncontrolled fires that burned in WTC 7 and those that occurred in the following buildings: First Interstate Bank Building (1988), One Meridian Plaza Building (1981), One New York Plaza (1970), and WTC 5 (2001).” -NIST WTC7 FAQ

Jason Strong said...

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William Walker said...

That is amazing that they could keep that building in that area. I have always been interested in demolition. I just wish I could either participate in it or be there when it happens. http://www.alliancedemolition.net

Jennifer Davies said...

Unbelievable. I wouldn't say this proves that it was pre-planned, but that demolition was incredibly fast. Those pictures really capture the event.

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