I just checked the nist report.
An airplane impact doesn't even matter, wtc7 wasn't hit by one.
It did not collapse in 5 seconds, 5 seconds was the visually obvious footage, but many things happened before that, it took 7 hours.
- Debris from wtc1 ignites fire on at least 10 floors. Sounds believable to me.
- floor 7-13 fires got out of control, primary sprinkler system failed, the redundancy or backup system didn't not work due to damage from the tower 1 and 2, the water supply for the backup relied on the cities water system which was mia on that day. This caused the fire to spread diagonally across the building. Sounds ok to me, I don't think anyone could make this up and it would be allowed into such a report without review.
There's much more but assuming usual explosives, this has to be considered:
The smallest charge capable of initiating column failure would have resulted in a sound level of 130 to 140 dB at a distance of at least half a mile.
This would be quite a couple seconds or max a minute before the full collapse, but no footage had such sounds, nor did witnesses report such sounds, and any nearby seismology equipment would detect irregularities.
Just for reference 130-140 decibels are much louder than I would have thought, 130 is peak stadium crowd noise, 135 is an air raid siren, 140 is a jet engine take off.
> There's much more but assuming usual explosives, this has to be considered...
True, but it is possible to apply the same strict epistemology to the consensus narrative as well, like how is it that "many things happened" resulting in an orderly freefall that appeared magically homogeneous across the entire structure, resulting in a descent that is (afaik) largely indistinguishable from a controlled demolition.
> but no footage had such sounds, nor did witnesses report such sounds, and any nearby seismology equipment would detect irregularities
A strict epistemological examination wouldn't let such premises be deployed without scrutiny.
> how is it that "many things happened" resulting in an orderly freefall that appeared magically homogeneous across the entire structure
I mentioned in my other comment the Surfside condo collapse, and that accidentally illustrates a key point about the WTC7 collapse. In the video of the Surfside condo collapse, we get a decent view of the origin of the collapse, so we can see how the collapse progresses. But with WTC7, the video we have is of the roof of the back side (with respect to the collapse origin). So we don't have visual of the collapse progress until it reaches the fairly homogeneous progressive collapse phase.
> resulting in a descent that is (afaik) largely indistinguishable from a controlled demolition.
All progressive collapses are going to look superficially similar. The most notable facet of a controlled demolition is the sheer sound of the charges going off to initiate the collapse. I've had the pleasure of being able to view a controlled demolition live, and I can tell you that the sound is loud enough and distinctive enough that all of the rescuers working on the debris pile that was the twin towers would have been reporting the explosions.
> But with WTC7, the video we have is of the roof of the back side (with respect to the collapse origin).
Which in itself seems a bit odd, not unlike the lack of footage of the Pentagon (publicly released footage, at least).
> So we don't have visual of the collapse progress until it reaches the fairly homogeneous progressive collapse phase.
Suggesting there is some uncertainty involved.
> The most notable facet of a controlled demolition is the sheer sound of the charges going off to initiate the collapse.
If one uses the traditional loud approach, agreed.
> I've had the pleasure of being able to view a controlled demolition live, and I can tell you that the sound is loud enough and distinctive enough that all of the rescuers working on the debris pile that was the twin towers would have been reporting the explosions.
Isn't it strange that all 24 internal columns of building 7 would collapse simultaneously?
Even if the office fires burned hot enough to compromise the columns, wouldn't they have advanced gradually over the diagonal span, trigger slow sequential collapses that might have resulted in the building listing or distorting, rather than falling flat to the ground in 5 seconds?
Would thermite be deployed explosively at 140db, or might it work over a longer period of minutes at lower volume to heat the steel columns to 700 degrees, the temperature at which it would lose structural integrity?
There's nothing mysterious here. Once a column begins to fail, the load it was supporting transfers to other columns. If several columns are weakened simultaneously, the remaining columns are pushed past their safety margins very rapidly, and the building enters a progressive collapse.
Should be very simple then to produce a model that would look like the actual video footage of the building's collapse in the real world wouldn't it? Yet here we are, 20 years later with no such model...
- Debris from wtc1 ignites fire on at least 10 floors. Sounds believable to me.
- floor 7-13 fires got out of control, primary sprinkler system failed, the redundancy or backup system didn't not work due to damage from the tower 1 and 2, the water supply for the backup relied on the cities water system which was mia on that day. This caused the fire to spread diagonally across the building. Sounds ok to me, I don't think anyone could make this up and it would be allowed into such a report without review.
There's much more but assuming usual explosives, this has to be considered: The smallest charge capable of initiating column failure would have resulted in a sound level of 130 to 140 dB at a distance of at least half a mile. This would be quite a couple seconds or max a minute before the full collapse, but no footage had such sounds, nor did witnesses report such sounds, and any nearby seismology equipment would detect irregularities. Just for reference 130-140 decibels are much louder than I would have thought, 130 is peak stadium crowd noise, 135 is an air raid siren, 140 is a jet engine take off.