Thats the one thanx.
The fire likely started further west and spread east. It could have started several floors below and spread upward through debris damage punctures in the floor pan. Are you suggesting now that the fires were deliberatly set? Do you have any evidence of this other than you can't envision how they got started?
I don't know how the fires got started and i don't consider it an issue.
However, i would put 'electrical short' at or near the top of the list.
If there was a peircing of the floor pan above the deisel room the smoke may well be exiting out that hole while air is coming into the room via the normal path by which the room in ventilated and the deisel supplied with air. That would put the smoke exiting the building on floors above that at which the fire is.
[By 'diesel room', do you mean the east mechanical room? pg 11 ]
Smoke would also be exiting thru the diesel room vents.
The 2 story mechanical room it in the center of the east side.
There are no reports of damage or fire in this area.
To damage the mechanical room, debris would have to bust thru floors 7 & 8. The smoke would be coming back up thru the debris hole.
NIST pg 18
At 12:10 to 12:15 p.m.
No heavy dust or smoke on floor 8
Cubicle fire on west wall of floor 7
Given that the elevator cars were ejected it is also possible that large debris came through the south wall at the 14th floor , entered the elevator shaft jamming at the 6th or 7th floor, severing the elevator cables and any safety devices and causing the cars to plummet until they hit the top of that piece of debris which forces them out at the 8th floor.
That's good. Put it in the 'anything's possible' file.
It is still west of the mechanical area.
In any case, it's speculation, not evidence; but i like your thinking.
The impact first of the debris and then the elevator cars hitting it bends a column or columns near the elevator shaft and punctures(but not neccessarily severs) a deisel line, the deisel is running since the power to the building went out and the pooling fuel eventually ignites and continues to be fed by the supply system.
so far, so good.
(the smoke exiting the closed deisel room via the elevator shaft and through any floor above)
If the diesel engines are running, the louvers are open.
The ensuing fire continues to weaken the columns that have already been bent out of shape by impact. The load on them is already higher than normal due to the severing of south wall perimeter columns which places more load (catenary action) on the core columns. The columns being heated compress under the load and thus load is shifted to nearby columns but this is in an area where loads are distributed in a way unique to WTC 7. This shifting of loads also causes other stresses on the columns and transfer beams that were never designed for. At some point the loads and no longer be distributed and one column fails completely initiating a dominoe effect first vertically and then with falling debris from above , also horizontally
It's about this horizontal thing.
Every floor must have shear strength in both directions.
[bracing to keep the columns from bending to the side]
The lower floors of a 47 story building must have a great deal of shear strength to handle the stresses of holding up 47 floor building in a hurricane.
Floors falling down will tear away, they will not make 15 massive support columns buckle to the side.
I'm just a carpenter, but this is an easy one.
YES, I know I just made this up. i did so with a basic knowledge of how the building was constructed and what the situation in WTC 7 was following the collapse of #1.
You, on the other hand are making your story up based soley on the fact that the building collapsed and made a big noise as it did so. period, end stop
I am basing my belief on what i see in the videos of WTC 7
First, the east penthouse falls. This takes about 5 - 7 seconds.
During this time, there is a hole being created so the east and west walls will fall inward.
Next, the rest of the center falls just before the outer walls, drawing them in.
The building falls very fast, some say at or near freefall, ......whatever.
The building falls mostly straight down and lands in a pile, mostly within its original footprint.
The surrounding buildings were of no concern. [imho]
Daryl was describing what he had just seen and heard.
What he described is consistent with a building implosion.
[no two implosions are exactly the same]
"....a
clap of thunder.........about
a second later the bottom floor caved out...."
The sound of the core of WTC 7 falling would be a rumbling, like distant thunder.
An explosion [or many explosions in rapid succession] sounds like thunder near by [ 2 - 4 sec. delay], that goes Ka-boom, rumble. [imho]
