houlepn@attglobal.net wrote:

BornN2BS wrote:

houlepn@attglobal.net wrote:

BornN2BS wrote:

houlepn@attglobal.net wrote:

BornN2BS wrote:

Here's a corollary to that one: Softened steel will not carry as
much load as it did before the hardened steel absorbed enough
heat to soften it.  (Compare this, roughly, to male anatomy if
you like.)

Bullshit detector going crazy!!! There was no softened steel.

Steel looses half its strength at 600C degree.

There is
NOTHING you can post here to explain how fire in the WTC softened ANY
steel.  Pure conjecture that is just another meaningless distraction.
Burning jet fuel is hotter than a forced air mixture of oxygen and
acetylene too, I guess.

Do you believe there is a temperature significantly lower than
600C such that stuff (fuel, furnitures, carpeting, etc.) stop
burning when it is reached?

You are implying that there were fires burning at 600 degrees Celcius.
Would you mind elaborating on that? What was burning? Are you claiming
that furniture, carpeting, and other materials inside the WTC burned
hotter than the fuel?

Temperatures attained in typical residential fires are in the 500C-650C
range as you can verify in such standard references as D. Drysdale,
"An Introduction to Fire Dynamics", and A.E. Cote, ed. "Fire Protection
Handbook 17th Edition". It would be surprising that the mere addition
of fuel would keep the fire from reaching a temperature which is
a common occurrence smaller residential fires.

Steel beams function as a heat sinks so that normal fires that
spread slowly from a localized source and burn most fiercely on
one floor at a time pump heat in the beams which gets dissipated
along them.

The main effect of some 10000 gallons of fuel being sprayed all at
once over a huge area of a few floors of the WTC was to spread the
fire very fast. Hence, beams in the middle of the inferno couldn't
dissipate heat as effectively towards cooler regions. (Heat conduction
is a matter of gradient.) This allowed them to attain close to the
ambient temperature that must have been in excess of 600C if the
fire was anything like typical (and probably much more at places.)
That is enough already to weaken steel significantly.

Carefully watch the video footage of the second WTC tower being
impacted. Most of the jet fuel explodes OUTSIDE of the tower, sir. I
imagine in all of your studying and referencing you must have merely
overlooked this tidbit of information.

It is hard to know from mere examination of the footage what fraction
of the fuel got inside. There is no question that enough got inside to
spread the fire very quickly on a vast area. This is a fact nobody
disputes. From that time on the mere presence of furniture and other
stuff is enough to raise the temperature to levels sufficient to stress
and weaken structural steel.

Your suggestion that steel has to melt in order to fail is groundless.
Your suggestion that temperatures in the 600C range can not be
attained are equally groundless. So there is no mystery in the
standard account of the WTC towers collapse. All that is needed
to account for the required temperatures is a large uncontrollable
fire that was spread very fast.

Why do you think that the WTC fires *must* have been much
cooler that typical residential fires are?

The only thing that is/was laregly uncontrollable is the mindless
diatribe that you and your cohorts have taken upon yourselves to
unleash like a plague. Stand upon your virtual soapboxes and beat your
make believe chests while proclaiming victory against imaginary foes.

If you can't watch the footage and see for yourself the fireball
expoding outside the WTC, then I'm afraid you are ignoring the obvious
and most compelling evidence that exists. Since it doesn't fit your
story, I'm not the least bit surprised. And since not one of you
low-life status quo seeking propaganda artists have addressed my
original post in this thread, shall I assume that you couldn't find
even the smallest hole from which to dig in and pry it apart? I
honestly expected more of a fight, but perhaps I hit upon an ugly truth
that can be niether denied nor explained away with your arsenal of
diversionary tactics.