The planes impacted about the 92nd floor, which means that only 18 floors were above the impact.
So 18/110 means approximately 16% of the total building's weight was affected.
Now ask yourselves, if you cut the support between 84% of something, and 16% of something, how does that change the relationship that 84% of something can still HOLD THE FUCKING WEIGHT of 16% of something?
The basic principles of engineering would require us to believe that since the building could already support the top floors severed by plane explosions, that the only event that could happen is the top of the buildings would have collapsed onto the remaining 84% and either jammed, or fallen off like the top of a tree breaking off.
When's the last time you saw a branch fall off a tree, and collapse the entire fucking tree?
I say "probably" because I'm trying to think creatively how 16% of something can gain enough "weight" to collapse something that is holding up itself and is 5.25x as massive as the thing falling on it.
Either the acceleration of the remaining 16% is enough to overcome the support allowed by the remaining 84% or it isn't.
Again if it isn't, then it'd just bounce off and fall to the side or fall around it like water balloon falling on a post.
The conduction and convection of heat traveled along the ( steel ) supports - heating adjacent building materials, as well as weakening the steel - causing the collapse of the building.
And you do not have to be an arson investigator ( I have certified arson investigation education ), or a structural engineer to know that.
Heat travels by = Conduction - Convection and Radiation.
Heat from superheated gases, as well as smoke from the fire ; met with some building components ; such as wood siding and other materials......causing them to meet their ignition temperature ( The lowest temperature needed for self sustained combustion - like holding a piece of paper over a lit lighter ) and burst into flames. Smoke carries heat, and the particles of what ever is burning. Yes, smoke can cause secondary fires.
Superheated gases from fires.....can cause secondary fires.
Smoke and Superheated gases......can be very - very dangerous.
You have to "read the signs" inside a burning building.
Shadow 355 ( Fire & EMS certified )