Crap…..
AI Overview
Did World Trade Center Building 7 really collapse due to an ...
Yes, steel-framed buildings can collapse due to fire, as the intense heat weakens the steel, causing it to buckle and fail. This process has occurred in buildings like the World Trade Center towers (WTC 1, WTC 2, and WTC 7) and the Plasco Building in Tehran. The collapse is a result of the steel losing strength, not melting, leading to a progressive failure where the floors above collapse onto the floors below.
How fire causes collapse
Weakening of steel: Steel loses about half its strength at temperatures achievable in a building fire, well below its melting point.
Buckling: Weakened steel columns and floor trusses can no longer support the weight of the floors above, causing them to bend, twist, and buckle.
Progressive collapse: When a column or floor fails, the massive weight of the floors above it crashes down, and this force increases as more floors collapse, leading to a domino-like effect.
Notable examples
World Trade Center (WTC) 1 and 2: After being struck by airplanes, the fires weakened the steel, causing the towers to collapse.
WTC 7: This building, which was not hit by a plane on 9/11, collapsed hours after the attacks due to fires ignited by debris from the Twin Towers.
Plasco Building (Tehran, 2017): This historic 17-story building collapsed after a fire burned for several hours.
Windsor Tower (Madrid, 2005): A massive fire caused the upper floors of this steel-framed skyscraper to collapse
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BBC - fake news yet again......[more]