Wtc 7 Leaning Against Verizon Building, cut column with molten slag Options

[Paul]

Hi found this photo of the wall columns of wtc 7 leaning against the verizon building where it landed as wtc 7 fell at freefall speed and leaned
back just hitting the verizon building causing some structural damage to the other building as it fell now look at the cut column with the molten
metal iron slag covering part of the top of the building as it fell, i dont know whether this is demolition cut by as thermite demolition charge because
of the molten metal that was produced when it was cut ot whether it is part of a clean up cut, what kind of torch used for cutting steel would produce
so much heat that it would leave messy iron slag dripping down the top of the column where it was cut if it was done by a clean up crew?
The funny thing i dont understand about all of this is if you look at the column which have been cut by clean up crews at ground zero and even
the columns that where cut up after they where removed is that none of them except for one of them a core columsn at ground zero appear to have
and molten metal slag where they where cut during the clean up process, so what kind of torch would leave such a messy cut? And would they use such a torch to make this kind of cut? I am interested to hear what you all have to say about this piece.

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Cheers Paul S

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[SanderO]

Paul...

YES that is the "blasted" I was referring to ... the odd shape of a box column end. I got some interesting information from an architect who was designing high rise steel buildings at the time and was in contact with Yamasaki the designer of the twin towers. According to him, he heard from Yamasaki that the fabricator of the huge box columns was having difficulty with the welding of the huge plates which make up those box columns and many welds were rejected. I assume they were all fixed to spec.

But if some slipped through it might explain the plates coming apart at the ends from asymmetric loading.

It wouldn't be the first time that testing and failed materials were used in construction.

It's an interesting tidbit and may mean nothing and may not even be true.... but it's from the horses mouth!