Amanda Angelika wrote:

In news:1151455669.525482.125960@p79g2000cwp.googlegroups.com,
houlepn@attglobal.net <houlepn@attglobal.net> typed:

The fact that WTC7 does appear to have collapsed from the bottom and
so soon after the fire people withdrew is somewhat puzzling though,
the lower floors should have been water logged which should have
cooled the steel framework.

Water running down stairwells away from the fire is no indication that
water was necessarily running down structural beams in the middle
of the fire as well.

That is true. It would tend to flow most effectively down the most
convenient path. However water should have collected more effectively lower
down the building as it accumulated from above causing whole floors to
become water logged.

Waterlogged floors below, assuming there were any, have no effects
on fires raging on dry floors above. I don't see your point. The plane
hit probably broke pipes. This will also result in water runnings down
stairwells. This is also (possibly) that much less water available
for sprinklers.

 I know in one of the accounts I read a group of people
escaped into the subway station beneath and it was mentioned quite a lot of
water was falling through the ceilings, by the time they actually escaped
through the ticket barriers.

Was that after the collapses occurred? This must also have caused
the rupture of a few water pipes. Whatever the case may be, it is well
documented that the sprinkler system was severely overloaded where
the fire was raging and that there was next to no firefighting effort,
most
operations being focused, sensibly, on rescue and evacuation.