OMG, agent. You are so inadequate, even more inadequate than the base plate for the
elevator guide rail support steel, which sat on a grillage.
That in turn rested on a 1 foot thick concrete slab.
Totally inadequate for the foundation of a core column.
The interior box column in the below image is outside the core and had a footing that went down perhaps 10 feet below the bottom of the core foundation it surrounded. Both were dug into the limestone formation underlying everything.
That is what a core column needs for foundation not a crappy bracket resting on a stack of "I" beam cribbing that bears on a 1 foot concrete slab.
The "grillage" in between the elevator pits can be seen in the core area of WTC 1. "Slurry wall" is an error and is really the perimeter footings of the tower.
The 17 foot thick is now known to extend from the outer edge of the outermost elevator pit to between the interior box column footings which were 5 feet measured perpendicular to the core face. That 5 feet of concrete is outside the core basewall which was 12 feet thick down into the core foundation