The Truss Failure Theory is a Diversion
It avoids the glaring deficiencies of the column failure theory,
but likewise doesn't begin to explain total collapse.
- Neither tower's fires covered even one entire floor.
- Eager's zipper scenario is impossible given the cross-trussing.
- The fall of a floor would easily be absorbed by the floor below.
- Some floors must have had large I-beams.
Otherwise the building's tube-within-a-tube design made no sense.
- A "domino effect" collapse of the floor diaphragms
would have left the perimeter wall and core standing.
The floors would have slid down the cores like records on a spindle.