2.28 seconds

WTC7: Nist Finally Admits Freefall (Part IV)

Last year forced David Chandler forced NIST to admit that there was a 2,25-2,28s long period of freefall during the collapse of WTC7.
However NIST won't admit that these period of freefall occurred at the very start of the collapse (NIST did choose to pick up artificially early start time,but as far as we know there's no such a thing recorded in the collapse videos).

What does this freefall period mean?

It means that for the first 2,28sec of the global collapse there was no resistance from the crushed parts of the building.

Let's look at this number closely.

How many floors of the WTC7 didn't offer any resistance?

A freefalling object (the upper block of WTC7) would travel the distance of 25,50m (t=2,28s, 24,80m for t=2,25s)