Originally posted by razorbackhater
You ask why would they do that? Well, who benefited from 9/11? What gets me is how did the trade centers fall? did a carbon based fire with
temperatures that will not exceed 800 degrees actually melt the steel frame with a melting point of 1400 degrees? defies logic
time for an engineering lesson. after a structure is built all the supprting steel is UNDER LOAD. usually hundred or thousands of tons of pressure to
hold the build up. you dont have to melt the steel to make a buuilding collapse, just making it hot enough will do, the weight bearing down in the
steel will do thre rest of the work.
they had a coating on the steel which literally blew off on impact, it wasnt designed to stay on in case a large jet came flying into the building as
they had no idea this would ever happen. the coating was for conventional fires that normally occur in a building, such as anything you can find in
an office, paper, furniture, plastics, etc. the coating blew off, the steel was exposed to the heat, the steel buckled under the tremdous load of the
building and poof....no more building, the rest of the building falling down is a result of two things, 1) a floor cannot hold the weight of the
floors above it, 2) it was design to implode and fall straight down. they have designed tall buildings like this for decades now. thats why they
never fell over, thats why they totally collapsed. thats why the steel gave way.
cleggy the main structure was the outside of the building, in order to maximize office space and flooring they moved the load bearing structure to the
outside which was highly unconventional back then because the buildings were so big and so tall they had to create a design that had not be used
before as no building had ever been built on such a grand scale. this allowed for a thinner structural design as it spread out the load bearing
structure and allowed them more elevators. the inside was supporting the main structure. like one joist helps hold an entire floor, but one joist
alone cannot. what holds the joists in place? the outside structure. thats the concept they used in designing the buildings. its a domino effect.
i'm not surprised they fell or how they fell to be honest. everyone seemed so perplexed and confused. if you actually look at each factor and
add them up its not hard to see how the buildings collapsed. that and having some knowledge in building design helps!