How do I post here?
To the shitposters who keep saying steel melts at 2k degrees and jet fuel burns at 1250 degrees. so blah blah blah.
Steel when subjected to 1,000 degrees F for 30 minutes looses 70% of it's strength.
So if the floor was designed to hold 1,000 tons it will only hold 300 tons,
THUS boom all falls down.
It doesn't need to melt it, after 30 minutes at 1,000 degrees F the steel beam looses 70% of it's strength so it collapas's
So in 10 minutes the floors would have lost 30-40% strength so then it sill collapases. The weight of the floor causes the floors below to collapase.
The plane had 63,034 gallons of jet fuel, or 211 tons. That amount was enough to damage the steel beams on several floors to cause structural failure.
Once the top floor failed they followed the middle support structure down