Are ridiculous or seem to be ridiculous?
Are ridiculous. Something utterly unnecessary such as bombs in the basement would just complicate things for a theoretical perpetrator. Plus there's no trace of explosives of any kind.
Imo the falling elevator/fuel theory is much more ridiculous
What about the falling elevator / fuel / transmission of impact energy to the foundations theory?
A few reminders:
- William Rodriguez's testimony from that very day that it sounded "like a rumble, like moving furniture in a massive way".
- Felipe David's testimony:
"That day I was in the basement in sub-level 1 sometime after 8:30am. Everything happened so fast, everything moved so fast. The building started shaking after I heard the explosion below, dust was flying everywhere and all of a sudden it got real hot.
"I threw myself onto the floor, covered my face because I felt like I was burned. I sat there for a couple of seconds on the floor and felt like I was going to die, saying to myself 'God, please give me strength.'"
Although severely burned on his face, arms and hands with skin hanging from his body like pieces of cloth, David picked himself up, running for help to the office were Rodriguez and others were gathered.
"When I went in, I told them it was an explosion," said David, who was then helped out of the WTC by Rodriguez and eventually taken by ambulance to New York Hospital. "When people looked at me with my skin hanging, they started crying but I heard others say 'OK, good, good, you made it alive."
(
source)
- Jose Sanchez, maintenance worker, located in Basement 4:
Sanchez recalls, being in a small sub-level 4 workshop with another man who he only knew by the name of Chino when, out of nowhere, the blast sounded as the two men were cutting a piece of metal: 'It sounded like a bomb and the lights went on and off. We started to walk to the exit and a huge ball of fire went through the freight elevator. The hot air from the ball of fire dropped Chino to the floor and my hair got burned. The room then got full of smoke and I remember saying out loud ‘I believe it was a bomb that blew up inside the building.'
You asked for such a testimony, didn't you?
I don't have a better source than this indirect one, since the original seems to be disappeared (I've archived this one just in case, the link is still alive):
http://backupurl.com/lupu8m
(Pretty interesting collection for both sides of the debate there, btw)
I really don't care about Willy since he was occupied by some holocaust denier. So I deceit it's a waste of time to study that. Nevertheless, I remember more witnesses who confirmed what Willy initially stated.
Do you mean the rumble thing? Because that's what he initially stated. Felipe David was the one who came to his office, his testimony is above.
André Rousseau: "Frequencies of waves generated by explosions are on the order of Hertz - which is the case here - while those of crash impacts are above 10 Hertz, often around 100 Hertz."
How many crash impacts against steel buildings have been measured to sustain that claim? I don't think the signals of a plane crashing into the ground and against a steel building are comparable.
The building sway was much slower than 1.4Hz but the frequency of the impact signals show a frequency of about 1.4Hz.
Hard to say where that frequency could come from. Resonance of foundations or steel members comes immediately to mind.
On the other hand, if an event generates seismic waves or not depends mostly on the contact to the ground.
That's a good point. Was the 1993 truck bomb in a column or in a truck?
As for the load simulation, I can't answer most of your questions, as I'm a layman in these fields. However, my point was that, regardless of the accuracy of the graphs, it's pretty obvious that the load increased unevenly over time, exceeding the capacity of some columns. Sooner or later the building had to come down. Blowing it was a very stupid idea.
I'll try to answer one of the questions, taking into account that it's my own view of the logic of it and not necessarily correct:
How could the SE quarter of the core reach those extreme loading conditions during the first 80min if the fire in that area wasn't observable prior to about 90 minutes? Is it because these columns are still cold?
That seems correct. The hot columns were more feeble and thus could not sustain the building so well as the cold ones. That increased the load on the cold ones.