9/11 conspiracy debate

[Oscar]

and the 747s were much bigger and carried much more gas than the 707, the 707s were the biggest around when the buildings were designed.

The planes that hit the towers were both 767's, which are slightly heavier than 707's, but nowhere near a 747.

[Oscar]

Which I reckon we can forgive them for...

Oh yeah, but the heat generated pretty much fucked the structral integrity of the already damaged structure.

[oneofsix]

The planes that hit the towers were both 767's, which are slightly heavier than 707's, but nowhere near a 747.

my bad - sorry

[Paul in NZ]

The Towers were designed to withstand a 707 hitting at cruising speed (it was a requirement due to the B25 hitting the Empire State Building during WW2).

The problem was that 1) the planes hit the buildings with the throttles to the stops (about 20% faster), and that b) the Engineers failed to factor in the heat generated by that much burning avgas.

Another factor was the construction. Rather than being steel reinforced concrete it was steel with fire retardant (think concrete) sprayed over it. The impact knocked a lot of that off....

[Oscar]

my bad - sorry

You shouldn't apologise for not being a train spotter...

[Crasherfromwayback]

Oh yeah, but the heat generated pretty much fucked the structral integrity of the already damaged structure.

Oh for sure. But pretty hard to see that one coming!

[Oscar]

Another factor was the construction. Rather than being steel reinforced concrete it was steel with fire retardant (think concrete) sprayed over it. The impact knocked a lot of that off....

I seem to recall there was some problem with the way the floors were attached to the central core as well.

[Str8 Jacket]

I am loving the tag; Trump to ask for DNA cert!!

[MSTRS:Me]

Think, too, that the planes were tilted on final approach to ensure impact damage to maximum number of floors at once.

[Banditbandit]

Granted many collapsing floors add extra weight, but how much more? Enough to allow the building to drop like it was on rails? I just can't see that happening, unless it was an utter fluke.

You?

OK ... the building has an exoskeleton - the rails running up the building which are clearly visible in the pictures. The floors are supported on beams bolted (yes, bolted) to the exoskeleton.

The New York Fire Brigade warned about this type of structure before 9/11 - as they believed the floors would collapse in much the way it actually did.

As the planes added weight to the floors and the heat melted the supporting beams the floors collapsed onto each other - adding weight and casuing more to collapse - so the building came down.

Now, the floor beams are inside the exoskelaton, which is strong enough to keep the flooring material inside the exoskelaton as it falls - hence the building falls straight down inside the exoskeleton, which collapses after the floor fall past it as it is no longer strong enough to stand upright.

Not hard to explain at all ...

[shrub]

OK ... the building has an exoskeleton - the rails running up the building which are clearly visible in the pictures. The floors are supported on beams bolted (yes, bolted) to the exoskeleton.

The New York Fire Brigade warned about this type of structure before 9/11 - as they believed the floors would collapse in much the way it actually did.

As the planes added weight to the floors and the heat melted the supporting beams the floors collapsed onto each other - adding weight and casuing more to collapse - so the building came down.

Now, the floor beams are inside the exoskelaton, which is strong enough to keep the flooring material inside the exoskelaton as it falls - hence the building falls straight down inside the exoskeleton, which collapses after the floor fall past it as it is no longer strong enough to stand upright.

Not hard to explain at all ...

I still blame Katman

[Jantar]

When did you get your ICI explosives and demolitions tickets???

DoL course 1973

[avgas]

DoL course 1973

Not MoW? 10char

[jasonu]

who plantd the bombs in those 3 buildings that day? Lest we forget 9/11 had an inside hand involved. Buildings don't fall at freefall speed without having the path cleared below the falling matter. Fullstop.

dickhead!!!

[Jantar]

Not MoW? 10char

No, the instructor may have been MoW, but the course was organised through the DoL after one of their inspectors didn't like us carrying gelignite, diesel and detonators in the same vehicle.