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Originally posted by twitchy
Oh thank god, it looks like you have completely confirmed the official story of the events of 9-11. It couldnt have been a controlled demolition if the buildings twisted a little, they would never do that. We can all go back to sleep now
Originally posted by Fowl Play
If it was CD, the twist is an uncanny coincidence that it happened milliseconds prior to collapse.
If it was CD, there would of been massive explosions, noone would of been in any doubt to as what happened, but im afraid this did not happen.
Thankyou for your worthy contribution
Originally posted by Fowl Play
"NIST concluded that the source of the molten material was aluminum alloys from the aircraft, since these are known to melt between 475 degrees Celsius and 640 degrees Celsius (depending on the particular alloy), well below the expected temperatures (about 1,000 degrees Celsius) in the vicinity of the fires. Aluminum is not expected to ignite at normal fire temperatures and there is no visual indication that the material flowing from the tower was burning.
Originally posted by Fowl Play
I am not the one who has to prove what you say..
I am providing documentated evidence from an official report, that details the official story..
You are providing secondary information that is hearsay, allegedly taken from a person/s that are not experts in this field..
You prove that the official line is not correct with something more than secondary sources, and then possibly i may emalgumate it into my opinion..
You havent given anything??
1) No WTC-7 steel was recovered or analyzed.
2) No unprocessed, intact floor trusses were recovered or analyzed.
3) No testing for explosives (or sulfidation or other residue of any kind) was performed.
4) Only 12 total core columns were recovered from WTC-1 & WTC-2 combined.
5) Of the recovered core pieces, none showed exposure to temperatures in excess of 250 C.
6) Of 170 examined areas on the perimeter column panels, only three showed exposure to temperatures in excess of 250 C and for one of these three forensic evidence indicated that the high temperature exposure occurred AFTER the collapse.
7) No recovered steel showed any evidence of exposure to temperatures above 600 C for any significant time.
A total of 236 recovered pieces of WTC steel were cataloged; the great majority belonging to the towers, WTC 1 and WTC 2. These samples represented a quarter to half a percent of the 200,000 tons of structural steel used in the construction of the two towers. The NIST inventory included pieces from the impact and fire regions, perimeter columns, core columns, floor trusses, and other pieces such as truss seats and wind dampers.
The collection of steel from the WTC towers was sufficient for determining the quality of the steel and, in combination with published literature, for determining mechanical properties as input to models of building performance.
...
Of the 31 core floor truss connectors (core seats) recovered, about 90 percent were still intact, although many were extensively damaged. Only two were completely torn from the channel.
...
A coating on the SFRM prevented the loss of the SFRM in some locations on the perimeter columns. This coating appeared as a band of white features on the SFRM wherever two aluminum panels met on the exterior columns of the buildings, becoming visible when the panels were dislodged. This may be a coating applied to protect the SFRM from moisture infiltration at the aluminum panel joints, acting to preserve the SFRM even when the SFRM was knocked off both above and below those locations.
...
The pre-collapse photographic analysis showed that 16 recovered exterior panels were exposed to fire prior to collapse of WTC 1. None of the nine recovered panels from within the fire floors of WTC 2 were observed to have been directly exposed.
NIST developed a method to characterize maximum temperatures experienced by steel members using observations of paint cracking due to thermal expansion. The method can only probe the temperature reached; it cannot distinguish between pre- and post-collapse exposure. More than 170 areas were examined on the perimeter column panels ...
Only three locations had evidence that the steel reached temperatures above 250 °C.
These areas were:
• WTC 1, east face, floor 98, column 210, inner web,
• WTC 1, east face, floor 92, column 236, inner web,
• WTC 1, north face, floor 98, column 143, floor truss connector
Other forensic evidence indicates that the last example probably occurred in the debris pile after collapse. Annealing studies on recovered steels established the set of time and temperature conditions necessary to alter the steel microstructure. Based on the pre-collapse photographic evidence, the microstructures of steels known to have been exposed to fire were characterized. These microstructures show no evidence of exposure to temperatures above 600 °C for any significant time.
Similar results, i.e., limited exposure if any above 250 °C, were found for two core columns from the fire-affected floors of the towers.
Originally posted by Fowl Play
M.I.T. professor of civil and environmental engineering Eduardo Kausel states:
I believe that the intense heat softened or melted the structural elements--floor trusses and columns--so that they became like chewing gum, and that was enough to trigger the collapse.