Ursprungligen postat av Pad
just meridian hittar jag inte särskilt mycket annan info om.
38 våningars skyskrapa som stod brinnandes i 18 timmar.
"Engineers later discovered that the building survived the fire with surprisingly limited structural damage; credit was given to especially thick layers of a relatively heavy, cementlike fireproofing that had been applied to structural steel."
Helt bra motargument.
Steel is a good conductor and concrete is a poor conductor of heat. Thus in a fire, a steel frame will conduct heat away from the hotspots into the larger structure. As long as the fire does not consume the larger structure, this heat conductivity will keep the temperatures of the frame well below the fire temperatures. The same is not true of steel-reinforced-concrete structures, since concrete is not a good thermal conductor, and the thermal conductivity of the rebar inside the concrete is limited by its small mass and the embedding matrix of concrete.
Fires can cause spalling of concrete, but not of steel. This is because concrete has a small percentage of latent moisture, which is converted to steam by heat. Thus, a large fire can gradually erode a concrete structure to the point of collapse, whereas a fire can only threaten a steel-framed structure if it elevates steel temperatures to such an extent that it causes failures.
"Light, spray-on fireproofing, which at some point had been knocked away, left steel supports for the floors exposed to the blaze. They twisted and pulled away from their connections, initiating collapses that stopped only because the concrete slabs of the floors refused to give way."
http://911research.wtc7.net/cache/wtc/analysis/compare/NYTimes_reportechoes.htm
http://911research.wtc7.net/wtc/analysis/compare/windsor.html
Notera att den brann i ca 24 timmar.
Värt att notera är också att sjuan fick brinna utan brandbekämpning. Hur många av dina alternativa bränder fick göra det?
Till detta påstående har jag redan kommit med faktabaserat svar en gång.
NIST har släppt en rapport om det. Du kan väl gå igenom vad de fått fel och backa upp det hela med trovärdiga källor och beräkningar.
De ändrar ju sin rapport hela tiden. Minst fem gånger har de ändrat den. Det senaste är något nytt fenomen som kallas "thermal expansion" som skulle lett till att stålet försvagats på byggnaden. I samband med det hade NIST också gjort en annan upptäckt. Nämligen ett fenoment som de kallar "eld"
(NIST hävdar att eld är hett) - Eld var något fenomenalt som ledde till "thermal expansion".
Ytterligare upptäckte de något som de vill kalla "gravitation", vilket gör att det blir tyngd på och gör att objekt faller smack rakt ner till grunden.
Och sedan detta med att det hittats smältad metall som ignorerats av NIST men som är tillkännagivet från FEMAs sida. Appendix C:
"Evidence of a severe high temperature corrosion attack on the steel, including oxidation and sulfidation with subsequent intergranular 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 steelÂ… The severe corrosion and subsequent erosion of Samples 1 and 2 are a very unusual event. No clear explanation for the source of the sulfur has been identified."
Richard Gage (Architects & Engineers for 9/11 Truth - Medlem av American Institute of Architects):
“Tons of [molten metal] was found 21 days after the attack,” said Gage in an interview with a Vancouver, Canada television station. “Steel doesn’t begin to melt until 2,700 degrees, which is much hotter than what these fires could have caused.”
“There are holes in this story that you can drive a truck through,” he added, citing NIST’s claim that no evidence suggested loud explosive booms accompanied the collapse of the building by reminding that Thermite, a steel cutting agent, makes no explosive sound.
“FEMA found it,” said Gage. “Dr. Steven Jones found it, in the dust that landed in the entire area of lower Manhattan. And he finds it in the chunks of previously molten metal [from the towers].”
Kolla också detta
http://www.ae911truth.org/supporters.php?g=_AES_#998760