D. Mindock wrote:
> http://www.congress.org/congressorg/issues/alert/?alertid=9027371&content_dir=ua_congressorg
>
> WHAT REALLY HAPPENED ON SEPT 11
>
> As we celebrate the 5th anniversary of Sept 11, more questions about
> what really happened that fateful day are surfacing. A businessman
> friend of mine who worked in the Twin Towers told me how everyone had
> to vacate their offices during innumerable fire drills months before
> Sept 11. These required they run to stairwells and wait for periods
> averaging 20 minutes. He recalls the bomb detecting dogs placed after
> the attack years ago were removed from then on. He is sure a
> demolition was planted then.
Yeah right. Let me guess, it was all the fumes from the ANFO corroding
his tin foil hat that alerted him!!!
>Many claim the buildings collapsed due
Do any of these people have the letters B.Eng(Civil) after their name?
If not then they are not Civil Engineers and then definitely not
Structural Engineers - you graduate from Uni with a degree in Civil
Engineering and then over the years due to experience and specialisation
become a Structural Engineer - Oh look, that's what I did hence I'm a
Structural Engineer.
> to the intense heat melting the steel. Please see the video
WHAT UTTER CRAP. One of the main causes of failure was that the steel
that comprised the floor trusses elongated due to heating. It didn't
melt, the heat caused its tensile strength to reduce until the floor
trusses failed causing lateral forces on the core which itself was
weakened by the heat, and also had a good number of floors sitting above
it. With the load from the floors above, the lateral forces from the
floor trusses and its columns weakened by heat it's no wonder the areas
around the impact points failed causing the collapse.
And no the building was not designed to withstand the impact of a
plane. The buildings were designed for wind loads etc, the usual
loadings that Structural Engineers worry about and then as an
AFTERTHOUGHT the building was checked to see how it would go up against
a plane - the case of the Empire State Building being hit be a Bomber in
WW2 being the "prior art". It was found that it should withstand the
impact of a 707 going slowly with an almost empty fuel load - a plane
lost in the fog looking for Kennedy Airport. The "weapons" on the day
were 767's. The difference in kinetic energy between the 707 scenario
and what actually happened is about 10 times greater in favour of the
767, which also had a close to full fuel load. Once again no need for
explosives, the planes had enough energy themselves.
Talking of the kinetic energy of the planes, that's why the fire
protection on the steel didn't work. It had basically shattered due to
the impacts of the planes with the buildings.
To claim that the destruction of the WTC towers was the work of
anything other than a situation that no sane Structural Engineer could
ever conceive and hence design for is the work of someone with a few
roo's loose in the top paddock. If you are skilled in the field of
Structures, it failure, unfortunately, makes sense.
> documentary based on real footage and witness's narration during that
> day mentioned below. One sees people standing in the top floors in
> gaping walls near the flames, still motioning about. If they were not
> burnt how can steel be melting? Many jumped to their deaths intact.
It didn't melt. Repeat after me, it didn't melt
> Molten steel is thick and like lava, flows slowly. These buildings,
No it isn't. It can be as viscous as water. Ever been to a blast furnace?
> after only 50 minutes of limited fires in the top floors, imploded in
> 9 seconds to the ground. Molten steel would have taken a long time to
> buckle 100 stories down. The nearby building 7 also imploded that
"buckle down 100 stories" WTF?????
> same day although small flames entered it! Its owner admits giving OK
> to have it imploded. Building 7 held active FBI and Wall Street
> investigation documents of on going cases. Some had investigations of
[SNIP]
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I studied Civil Engineering with a major in Structures and Analysis not
Medicine with a major in Psychiatry so I'll leave the reader to make
their own judgements on the rest of this.
Regards,
Andrew Lowe B.Eng(Civil)
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