reply to post by ANOK
I said, and maybe should have clarified, that they were not welding the seperate column trees together. In the FEMA report on WTC1 and 2, they do
talk abotu how the exterior column trees were NOT welded, but bolted together, except for closer to the base and at the mechanical floors.
www.fema.gov...
Page 2-3 in the document, page 3 on the pdf.
I never said the whole structure had no welds. You were pointing out the plates that attached the three columns of the spandrel tree. Yes those were
welded together because of the obvious. I was pointing out the whole column tree modual which connected together, were connected mostly with bolts
only, except for, as I mentioned, the lower floors and mechanical floors. Be sure to read everything before you jump to conclusions. They mention the
plates but not the ends of the column trees being welded together. Plates are different, the ends are different. i was constantly talking about the
ends of column trees not being welded together (except for the aforementioned areas).
I do not deny the floor pan on which the floors were placed onto the trusses were welded either, or the seats on which the floor truss bolted onto.
But you see? reading comprehension. I did mention the seats were welded to the exterior column and interior, (at least I think i did mention once
before, if not I apoligze), but the floor truss itself was bolted to the seat. Those are the areas of failure in the collapse of the floors. The bolts
were first torn off the seats, before as they got lower, just sheered off the entier seat off the exterior column to which it was sat in. Read the
FEMA report.
ALWAYS be sure to read everything thouroghly and understand WHAT EXACTLY are they talking about. In the cases you presented, they were all about
different areas, (plates, truss seats) but not the ends of the column trees I was talking about that were bolted only.
I would reccomend actually reading the FEMA report to better understand the collapse characteristics seen, of the WTC and the connections themselves.
I'm willing to bet none of you have ever fully read through the important parts of the NIST or FEMA documents, much less, understood what they were
talking about.
[edit on 2/19/2010 by GenRadek]