Why Did WTC 7's Rooftop Penthouse
Collapse Ahead Of The Rest Of The Tower?
Aidan Monaghan 9/11 Blogger
Monday October 01, 2007
Why did the collapse of WTC 7 shortly after 5pm on September
11, 2001, begin with the fall of the rooftop penthouse located
on the east end of the tower? Based on the following images, one
can see that significant structural damage to the southeast face
of WTC 7, directly below the penthouse (yellow circle), apparently
did not exist. This conclusion can be based on the survival of
the pedestrian bridge located near street level, directly below
this rooftop penthouse (red circle). The absence of heavy structural
steel from WTC 1 in the region of this bridge (right), virtually
eliminates the possibility that significant damage to the southeast
face of WTC 7, lead to the onset of WTC 7's collapse.
By comparison, debris from the collapsing WTC 2 is known to have
damaged the nearby Bankers Trust building. Debris from WTC 2 that
impacted with the Bankers Trust building is clearly visible on
the ground beneath the building itself.
(Article continues below)
Publications such as 'Popular Mechanics' have repeatedly alleged
that still unverified damage to WTC 7 lead to its collapse:
"On about a third of the face to the center and to the bottom
— approximately 10 stories — about 25 percent of the depth of
the building was scooped out."
