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. 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.
-- 
Amanda