Nyctohylophobia

MYTH Progressive collapse only happens from controlled demolition and no collapse in history remotely resembles those on 9/11

L'Ambiance Plaza had a partial collapse, but don't forget that it wasn't hit by a jet. The collapse, even though it took place during construction, shows that when such a building can't support a given load it will undergo progressive collapse. Just remember that historically, no other buildings have been hit by 500+ mph fuel-loaded passenger jets and had their trusses' fire-proofing blown off, much less had lateral load-bearing steel beams sheared off and vertical load-bearing core columns severed by jets. In WTC 7 there was a 20 story gash and the bottom floor fires raged for 6 or 7 hours and had these weakened floors supporting 40+ stories, and the steel wasn't reinforced by concrete, unlike the Madrid Windsor building. I'm sick of simplistic statements that the buildings collapsed by "fire" because there were many other factors which were historical firsts. You can't expect other buildings with different designs to perform the same as the WTC towers. Firefighters and others worried that One Meridian Plaza would do a pancake collapse. McCormick Plaza shows that steel structures can collapse because of fire alone. The partial collapse of Ronan Point is another example of a progressive collapse and had engineers worry about progressive collapse. The other buildings had "steel web" designs rather than "tube in a tube" construction like the WTC.