Page 29 from the book
by Don Paul and Jim Hoffman

index of sample pages

This an HTML version of the page from the book.
The formatting of the page in the actual book is slightly different.
the core of the matter
This construction photograph of the North Tower shows that the core structures consisted of bundles of columns cross-linked by horizontal and diagonal members.

Construction photographs of the Twin Towers reveal a possible reason FEMA went to such great lengths to hide the existence of the structural cores.

Each tower's core contained 47 continuous box columns which ran from the bedrock foundations seven stories below street level to near the tops of the Towers, where they transitioned to I-beams. These box-columns measured 36 inches by 16 inches and were fabricated of steel four inches thick near the Towers' bases.

FEMA's report hides and minimizes the core structures whose their existence made the symmetric total collapses of the Towers due to gravity impossible. Even if the collision and fire damage could have induced collapse events, they would have caused the Towers to topple like trees, pivoting about the cores at the impact zones.

Destroying the core columns is key to achieving total building collapse, yet FEMA's long report has only one short passage explaining how the cores self-destructed.

As the floors collapsed, this left tall freestanding portions of the exterior wall and possibly central core columns. As the unsupported height of these freestanding exterior wall elements increased, they buckled at the bolted column splice connections, and also collapsed.

Note the legalistic language of ‘ possibly central core columns ’. The authors knew the core columns were not free-standing and would not instantly self-destruct if the floors fell away. Nor were the perimeter columns, stitched together by horizontal spandrell plates, free-standing as the passage implies. By qualifying this key assertion, FEMA's team might have been protecting themselves from possible future prosecution for obstruction of justice.

(c) Don Paul and Jim Hoffman