All right.
To be precise:
NIST specifically says that the building did NOT fall at "near G" acceleration. NIST makes no statement regarding at what acceleration the building fell, because nobody could see the building, because it was behind an opaque external wall.
Plus, it didn't fall as a unit. It fell piecemeal.
NIST specifically says that the external north wall fell, for approximately 100' at "approximately g".
That is NIST's precise statement. You KNOW that this is NIST's precise statement.
I'll deal with you skipping my other questions later, for now you need a correction.
You stated:
"NIST specifically says that the external north wall fell, for approximately 100' at "approximately g"."
Which page did you read this? Please point me to it. I await for your reply and I apologize in advance for your correction if I missed this somewhere.
tick tock...
Actually, I think you really meant that NIST "specifically" stated:
In Stage 2, the north face descended at gravitational acceleration, as exterior column buckling progressed and the columns provided negligible support to the upper portion of the north face. This free drop continued for approximately 8 stories (105 ft), the distance traveled between t=1.75 s and t = 4.0 s.
- NCSTAR 1-9, p. 602.
Now this begs a question, which I've alluded to many times.
How would
that happen with the columns Salvarinas specified?
Your "it buckled Derek" tells me you're not well trained. You're an engineer Tom, you understand energy methods (I assume), so please explain to me Tom TFK at JREF how exactly this north face descended at gravitational acceleration as exterior column buckling progressed and the columns provided
negligible support to the upper portion of the north face.
And while your at it, tell me all about your ideas on how this free drop continued for approximately 8 stories (105 ft), the distance traveled between t=1.75 s and t = 4.0 s. with the the columns Salvarinas specified.
Again, we'll deal with the other questions later.
Thanks buddy.