Quote:
Originally Posted by thephnxman
YOU DON'T KNOW WHAT "FORGED" MEANS!
Steel used in sky-scrapers come from carbon steel, forged at 2200+ degrees F.
Jet fuel
burns at about 1500 degrees F.
So there are two reasons why the Twin Towers could have collapsed. (1) Shoddy workmanship
by the supplier(s) of the I-beams; or (2), explosives previously placed in the buildings, themselves.
Now guess why the evidence was wisked away!
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Yes I DO know what forged means.
Once again you are working on the rationale that the steel had to melt. It did NOT have to melt and that is what my evidence proves. All that had to take place was for the steel to be structurally weakened enough so that tons and tons and tons of Steel and Concrete above it would make them buckle
Forging does not mean "Make steel resisted to heat". All forging does is shape a piece of metal to form. In some cases it can be uses to harden a piece of metal.
"
Steel loses strength when heated sufficiently. The
critical temperature of a steel member is the temperature at which it cannot safely support its load. Building codes and structural engineering standard practice defines different critical temperatures depending on the structural element type, configuration, orientation, and loading characteristics. The critical temperature is often considered the temperature at which its
yield stress has been reduced to 60% of the room temperature yield stress.
[17] In order to determine the fire resistance rating of a steel member, accepted calculations practice can be used,
[18] or a
fire test can be performed, the critical temperature of which is set by the standard accepted to the Authority Having Jurisdiction, such as a building code. In
Japan, this is below 400 °C[
citation needed]. In
China,
Europe and
North America (e.g., ASTM E-119), this is approximately 1000–1300 °F
[19] (530-810 °C). The time it takes for the steel element that is being tested to reach the temperature set by the test standard determines the duration of the
fire-resistance rating. Heat transfer to the steel can be slowed by the use of
fireproofing materials, thus limiting steel temperature. Common fireproofing methods for structural steel include
intumescent, endothermic and plaster coatings as well as drywall, calcium silicate cladding, and mineral or high temperature insulation mineral wool blanket.
[20]
Concrete building structures often meet code required fire-resistance ratings, as the concrete thickness over the steel rebar provides sufficient fire resistance. However, concrete can be subject to
spalling, particularly if it has an elevated moisture content. Although additional fireproofing is not often applied to concrete building structures, it is sometimes used in traffic tunnels and locations where a
hydrocarbon fuel fire is more likely, as flammable liquid fires provides more heat to the structural element as compared to a fire involving ordinary combustibles during the same fire period. Structural steel fireproofing materials include intumescent,
endothermic and plaster coatings as well as
drywall,
calcium silicate cladding, and mineral or high temperature insulation wool blankets. Attention is given to connections, as the
thermal expansion of structural elements can compromise fire-resistance rated assemblies"
BTW there is a REASON why they wrap the I beams with a protective barrier to fire. Because those beams can weaken under heat
http://en.wikipedia.org/wiki/Structu...rmal_propertie
BTW one more thing. It wasn't merely jet fuel. It was everything burning and cooking not to mention the air from the high altitude blowing in. It was not a controlled burn where you can measure the temp.
Study how forges work and how they get REALLY HOT. It's because there is a fire in a confined space with an oxygen supply
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