– “What do you think about my remarks with regard to your calculations?”
Do you mean your April 21 03:51 comment #52251?
Yes, I took the load bearing capacity as zero since I couldn’t calculate it, and because the truss ends and truss seats look like almost nothing compared with the perimeter and core columns:
http://cryptome.org/info/wtc-punch/pict55.jpg
Instead, I did the momentum transfer calcs, or rather I guestimated them and Nikko’s spreadsheet did it more thoroughly, and then I went back to ensure there was enough energy dissipated in inelastic collision momentum transfer to tear out the truss connections. There’s enough spare energy throughout collapse; not a huge excess at first, but the initial part of the collapse was the slowest anyway. Once the collapse accumulates mass and velocity there’s loads of spare energy, and momentum transfer becomes the main thing holding it back.
This is what I meant a few comments above: April 23, 02:20 #52343