Only Demolition and Severe Earthquakes Have Leveled Skyscrapers
Steel-frame high-rises have been in use for over a century.
- No steel-frame high-rise has ever collapsed due to fire.
- Other skyscrapers have been ravaged by severe fires. Examples include:
- One Meridian Plaza fire blazed for 18 hours, gutting 8 floors.
- First Interstate Bank Building fire burned for 3-1/2 hours, gutting 4 floors.
Both fires exhibited: 
- Large emergent flames
- Extensive window breakage
- Blazes filling multiple entire floors
These fires were much worse than those in the Twin Towers and Building 7.
Neither fire significantly damaged vertical steel columns.
Outside demolition, total collapses of steel buildings are extremely rare, even in the event of severe earthquakes.