https://www.popularmechanics.com/technology/design/a3524/4278874/
“After 7 hours of uncontrolled fires, a steel girder on Floor 13 lost its connection to one of the 81 columns supporting the building. Floor 13 collapsed, beginning a cascade of floor failures to Floor 5.”
Hence, the dominos link of my previous reply.
Guy. Building 7 is the first and only steel frame building in history to supposedly fail due to fire.
It looks like you found a new way to perfectly implode buildings. Just blow a one steel girder on floor 13.
Maybe you can patent it or something.
But seriously, read this report by actually competent engineers and not idiot propagandists in Popular Mechanics
https://ine.uaf.edu/projects/wtc7/