Friday, March 30, 2007

Not the first time a steel framed building collapsed due to fire

"Contrary to popular belief, September 11, 2001 was not the first time a steel framed building collapsed due to fire. The McCormick Center in Chicago and the Sight and Sound Theater in Pennsylvania are examples of steel structures collapsing." - debunking911.com

Average building fire temperatures range from approximately 700 Degrees to 900 Degrees Celsius. Steel weakens dramatically as its temperature climbs above 230 Degrees Celsius, retaining only 10% of its strength at about 750 Degrees Celsius.

All steels lose strength with increasing temperature. By 600 Degrees Celsius, most structural steels have lost more than half their strength. At intermediate temperatures the strength is independent of time, but above 500 Degrees Celsius, creep, or time-dependent deformation, further reduces the load-carrying capability. To combat this loss of load-carrying capability, structural steel in buildings is insulated to keep it cool in fire.

NIST is very clear:

"the NIST investigation showed conclusively that the failure of the inwardly bowed perimeter columns initiated collapse and that the occurrence of this inward bowing required the sagging floors to remain connected to the columns and pull the columns inwards. Thus, the floors did not fail progressively to cause a pancaking phenomenon."

"Based on this comprehensive investigation, NIST concluded that the WTC towers collapsed because:
(1) the impact of the planes severed and damaged support columns, dislodged fireproofing insulation coating the steel floor trusses and steel columns, and widely dispersed jet fuel over multiple floors; and
(2) the subsequent unusually large jet-fuel ignited multi-floor fires (which reached temperatures as high as 1,000 degrees Celsius) significantly weakened the floors and columns with dislodged fireproofing to the point where floors sagged and pulled inward on the perimeter columns. This led to the inward bowing of the perimeter columns and failure of the south face of WTC 1 and the east face of WTC 2, initiating the collapse of each of the towers.

Both photographic and video evidence—as well as accounts from the New York Police Department aviation unit during a half-hour period prior to collapse—support this sequence for each tower."

"NIST's findings also do not support the "controlled demolition" theory since there is conclusive evidence that:

* the collapse was initiated in the impact and fire floors of the WTC towers and nowhere else, and;

* the time it took for the collapse to initiate (56 minutes for WTC 2 and 102 minutes for WTC 1) was dictated by (1) the extent of damage caused by the aircraft impact, and (2) the time it took for the fires to reach critical locations and weaken the structure to the point that the towers could not resist the tremendous energy released by the downward movement of the massive top section of the building at and above the fire and impact floors.

Video evidence also showed unambiguously that the collapse progressed from the top to the bottom, and there was no evidence (collected by NIST, or by the New York Police Department, the Port Authority Police Department or the Fire Department of New York) of any blast or explosions in the region below the impact and fire floors as the top building sections (including and above the 98th floor in WTC 1 and the 82nd floor in WTC 2) began their downward movement upon collapse initiation.

In summary, NIST found no corroborating evidence for alternative hypotheses suggesting that the WTC towers were brought down by controlled demolition using explosives planted prior to Sept. 11, 2001. NIST also did not find any evidence that missiles were fired at or hit the towers. Instead, photographs and videos from several angles clearly show that the collapse initiated at the fire and impact floors and that the collapse progressed from the initiating floors downward until the dust clouds obscured the view."

See:
http://wtc.nist.gov/pubs/factsheets/faqs_8_2006.htm

8 comments:

Anonymous said...

"..no evidence (collected by NIST, or by the New York Police Department, the Port Authority Police Department or the Fire Department of New York) of any blast or explosions in the region below the impact and fire floors" ???????


So
1: Whats the flashes and the white smoke-puffs showing up outside the buildings if not cut-through-steel-explosions according to demolition experts ? Trashcans on fire ?

2: What do the early pictures of ground zero show? Straight Beams cut of at a very specific angle or bent and twisted beams? BEAMS CUT OF IN A VERY SPECIFIC ANGLE..

3: Why was evidence removed and recycled so rapidly and why were private investigators not supported in their struggle for the truth??

Ola from Sweden
(excuse me for bad spelling etc)

Anonymous said...

How does NIST explain the pools of molten steel found at the base of all 3 towers? Despite video and images of this molten metal all over the internet, NIST denies it's existence. Why would NIST deny evidence that clearly does exist? Perhaps because the presence of molten steel debunks the idea that carbon fire caused the collapse?

And what about the evidence of nano-thermite found in the WTC dust? Active nano-thermite is found in the WTC dust. This material is highly advanced, using nano-scale materials and requires advanced military laboratories to produce. How did this get there? Could this perhaps explain the presence of molten steel?

Furthermore, billions of tiny spheres of previously molten iron are found lacing the WTC dust. How did these iron spheres get there? A product of the thermite reaction is molten iron, which sprays off of the reaction, cooling and hardening in mid-air as little spheres. Interesting coincidence, eh?

It doesn't take much research to see that the NIST report is a complete sham. They ignore (and fabricate) a lot of critical evidence.

"..no evidence (collected by NIST, or by the New York Police Department, the Port Authority Police Department or the Fire Department of New York) of any blast or explosions in the region below the impact and fire floors"

...search youtube for "911 secondary explosions" and see compelling proof that there were indeed multiple explosions and fires in the lower levels of the buildings. You can even listen to the police and fire radio communication as multiple firefighters are reporting the secondary explosions. You can even hear multiple explosions on an audio tape recorded from inside one of the towers.

Basically the NIST investigation was a complete farse, and it doesn't take a physicist to realize that.

Santa Barbara Green building said...

Hi
Nice post.it will be very interesting and informative to us.we have a news about real estate information.

dave burke said...

Hi
Nice one! I like the outfit of the characters. Wish i could do the same thing too but im not that techie.i like the outfit of “from farmer to warden”.. really interesting.

Anonymous said...

I thought this was going to talk about the supposed other buildings that have collapsed due to fire? This just went on to talk about the WTC and how NIST didn't find any evidence. This site is no better than what we were told on 9/11/01. Look if you want to believe that the steel was buckling and caused a collapse of some sort, then you will have to admit that the rest of the undamaged building would resist the collapse and still remain partially intact. Leaving what we should have seen as a standing damaged building with part of the core sticking out. In fact the core should have punched through the roofs!!! Why were the emergency roof exits locked? Why wasn't there some sort of building jumper action going on at street level? Why didn't rescue helicopters land on the roof? Oh that's right too much smoke up there and the helicopters blades could not clear the air. No emergency efforts were made that day other than the firemen in the stairwells. None of the really needed emergency help was done because they knew the buildings were coming down. Why after the first impact is secret service and police telling people to back away and stay back for a fire that's 80+ stories up? How could anyone at street level get hurt? Oh yea they were told to clear the area as best as they could. I can see how we were all fooled that day but now there is not reason to believe that 19 hijackers with box cutters and OBL had anything to do with 911. There are more things pointing to an inside job and clear evidence of demolitions. Just watch a video on demolitions and see how it looks just like the WTC. Let just say planes hit the towers, well they weren't hit in the same spot nor was the impact the same. So how in the world can two buildings hit in different spots, with the top of the tower leaning towards the street defying physics and collapsing straight down twice!?!? Oh yea because they were TWINS!!! Surely they will fall the same, not really this was truly a government controlled operation. Don't be a fool!

Anonymous said...

Asymmetrical damage would not result in symmetrical collapse. Not twice, not even once. The towers were wired, and the job was done so that an all-out assault on the U.S. constitution could be initiated.

Pat P said...

Ok, what are the other buildings that collasped due to fire????

CookieMonster said...

http://www.infowars.com/video-911-firefighters-reveal-huge-explosions-before-towers-collapsed/