By Frank Legge, PhD (Chemistry) and Tony Szamboti, Mechanical Engineer
23 Dec 2007
Photos added by travellerev
This is the Windsor tower in Madrid a steel framed building similar to the Twin towers which burned for over 24 hours in a raging fire and did not collapse. As you can see the heat was much hotter than the fires in the Twin Towers. yet it did not collapse in 10 seconds into pulverised dust. In fact it was strong enough to carry a crane on top.
This is the plane impact hole of the North Tower, the tower that got hit first. In the red box you see the minute figure of a human being.
She died in the collapse but she left us something valuable. She testifies to the fact that the fires were not hot at all. She could stand in the hole, with her clothes and hair not being on fire, and she could hold on to the metal. (travellerev)
Numerous arguments have been presented that the Twin Towers at the World Trade Centre
could not have collapsed in the observed manner due to the cause asserted in the NIST report,
namely damage from plane impact and fire.
The bases of these arguments include the rapidity
and symmetry of collapse,
the adequacy of the steel supports,
and the finding of incendiary
residues in the dust.
It has also been argued that the initiating event in the official explanation,
the sudden collapse of one storey,
could not have occurred because the steel was not hot
This argument is based on data set out in the NIST report itself.
There is another argument, as will be described here, that is based simply on the behaviour of
hot steel under load. No calculations are involved and no knowledge of the temperature of the
steel is required.
In the official explanation the collapse occurs in two stages. In the first stage one storey,
damaged by plane impact and fire, suddenly collapses. This allows the section of the tower
above to fall freely down and hit the lower section. In the second stage the energy of this
impact is said to be sufficient to cause the top of the lower section to disintegrate. This material
adds to the falling mass and further impacts cause disintegration to continue in a rapid sequence
all the way to the ground.
Let us consider the situation just prior to the first stage. There are some damaged columns,
some fire, and a claimed lack of fireproofing. Given the substantial safety factor in the building
design, the number of damaged columns is far too few to put the buildings at risk without the
fire. This is elaborated on in the NIST report and elsewhere.
We will ignore the fact that according to the physical evidence data within the body of the NIST report, and contrary to its
conclusion, the steel did not get very hot. We will assume the strongest case for the official
theory: the fire was uniform over the whole area and very hot.