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Officials are assuming it appears that the fire will not melt steel beams and the weight of the upper floors brings the whole thing down. CNBC says it started around the 20th floor and has spread upward. Steel beams can melt as we know from 9/11.
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Now they are saying that the building has fire proof doors that close automatically and this keeps the fire around the edges and not internal.
Last edited by howard555; 12-31-2015 at 12:14 PM..
Officials are assuming it appears that the fire will not melt steel beams and the weight of the upper floors brings the whole thing down. CNBC says it started around the 20th floor and has spread upward. Steel beams can melt as we know from 9/11.
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Now they are saying that the building has fire proof doors that close automatically and this keeps the fire around the edges and not internal.
Yes. Especially when a crashing 200+-ton aircraft sheers fire-retardant insulation off the steel beams, and when the fires are fueled by over 10,000 of gallons of aviation fuel.
Officials are assuming it appears that the fire will not melt steel beams and the weight of the upper floors brings the whole thing down. CNBC says it started around the 20th floor and has spread upward. Steel beams can melt as we know from 9/11.
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Now they are saying that the building has fire proof doors that close automatically and this keeps the fire around the edges and not internal.
Yeah, it's also lacking a kinetic energy impact roughly equivalent to having about 300-400 fully loaded Semis drive into it's middle at 60mph. I wonder how doors, beams etc. hold up to that?
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I wonder how doors, beams etc. hold up to that? 
