posted on Jul, 7 2013 @ 09:56 AM
explained the symmetric collapse of WTC 7 by stating that it was only the
exterior wall that collapsed symmetrically and that happened because of greater stiffness and strength of the exterior wall.
The symmetric appearance of the downward fall of WTC 7 was primarily due to the greater stiffness and strength of its exterior frame relative to
the interior framing.
I have two questions about it.
1) Where can I verify that the exterior frame was stronger than the interior?
2) If the exterior wall was left standing after the interior already collapse, why didn't it fall to a side?