On Wed, 9 Sep 2009 14:29:17 -0700 (PDT), "
wrote:

On 9 Sep, 22:10, "Steve Terry" wrote:

No steel framed building has EVER collapsed due to fire before 9/11, or
since. Yet we're expected to believe that at least THREE did that day.

No steel framed building fire has ever been fuelled by thousands of gallons
of aviation kerosene before.

I don't doubt that the impact and fires would have caused the collapse
of the towers but there is one bit that I have never understood.

I would have anticipated that the supports on one side of the building
would have failed, causing the tower to twist and fall sideways. Maybe
one side would collapse dragging the other side towards it. I would
never had anticipated that a building would pancake straight down into
it's own footprint, as all 3 did.

A sideways collapse was probably intended, the aircraft flew into the
towers from north and south.

Fred DIbnah used to fell mill chimneys like this; he'd gradually cut
out the brickwork on one side, inserting temporary timber supports.
He'd then burn out the timber supports and the chimney would fall like
a tree. Why didn't the twin towers fall like that, if the supports had
been asymmetrically damaged and burnt?

If you wanted to get a building to collapse straight down, I would
have thought that you would need to sever all the vertical supporting
columns simultaneously to achieve that. I'd think you could only
achieve that with a controlled explosive demolition. I admit that I
have no expertise in these matters.

There was a link posted on here some months back of the collapse of
WT7, which showed a line of simultaneous puffs of black smoke, all at
the same level, at the start of the collapse. I thought it looked very
like an explosive demolition. What was it? Had someone photoshopped
the video?

I really don't see why people have difficulty with all this. It only
takes one floor to give way and the weight and force of the building
above collapsing onto the next floor causes the pancaking effect.

The air between those floors has to go somewhere, explaining the puffs
of air/black smoke out the sides as it falls.


This is worth a watch:
http://www.youtube.com/watch?v=bMZ-nkYr46w