since common courtsey shut down my thread dealing with a new development, we can always go to this tread and discuss these things.
p.s. common c. we havent discussed this new develpment because it just came out!!!
this is an interesting development. the nist has released their final report showing how they think the wtc 7 collapsed. only problem is they had NO steel to analyze. its all photo/video evidence and a computer simulation. from what ive read, they havent released the "evidence" they present so we cant view the video/photos that they had access too. fema had steel to analyze and it showed some very interesting characteristics.
just wondering what people think with nist not analyzing or having access to that steel fema had access too. and how, using the scientific method, one would come to the conclusion they did NOT HAVING ANY STEEL TO ANALYZE!!!
http://www.nydailynews.com/ny_...rought_7_wtc_down.html
"Our study found that the fires in WTC 7, which were uncontrolled but otherwise similar to fires experienced in other tall buildings, caused an extraordinary event," said Dr. Shyam Sunder, the lead investigator on the project.
"Video and photographic evidence combined with detailed computer simulations show that neither explosives nor fuel oil fires played a role in the collapse of WTC 7."
In particular, the 77-page report concluded that a crucial steel support column was weakened.
"When this critical column buckled due to lack of floor supports, it was the first domino in the chain," said Sunder.
Sunder said his team looked for evidence of an explosion but found no signs of a large boom or other noise.
Investigators also concluded there was no evidence that the collapse was caused by fires from a substantial amount of diesel fuel that was stored in the building.
now for the fema wtc sample.
Although the exact location of this beam in the building was not known, the severe erosion found in several beams warranted further consideration.
Evidence of a severe high temperature corrosion attack on the steel, including oxidation and sulfication with subsequent intragranular melting, was readily visible in the near-surface microstructure. A liquid eutectic mixture containing primarily iron, oxygen, and sulfur formed during this hot corrosion attack on the steel. This sulfur-rich liquid penetrated preferentially down grain boundaries of the steel, severely weakening the beam and making it susceptible to erosion. The eutectic temperature for this mixture strongly suggests that the temperatures in this region of the steel beam approached 1,000 °C (1,800 °F), which is substantially lower than would be expected for melting this steel.
Summary for Sample 1
The thinning of the steel occurred by a high-temperture corrosion due to a combination of oxidation and sulfidation.
Heating of the steel into a hot corrosive environment approaching 1,000 °C (1,800 °F) results in the formation of a eutectic mixture of iron, oxygen, and sulfur that liquefied the steel.
The sulfidation attack of steel grain boundaries accelerated the corrosion and erosion of the steel.
******that steel from the fema sample could have been a contributing factor for the collapse and there is NO mention of that sample in the nist report*******
the whole nist study:
http://www.ae911truth.org/docs..._1A_for_public_comment[1].pdf