|
|
| Re: World’s skinniest skyscaper (2026534) | |||
 |
|||
| Home > OTChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: World’s skinniest skyscaper |
|
|
Posted by TRAIN DUDE on Sat Oct 4 08:40:18 2025, in response to Re: World’s skinniest skyscaper, posted by Spider-Pig on Fri Oct 3 11:29:44 2025. Google AI Overview"The World Trade Center towers collapsed due to the combined effects of the terrorist attacks on September 11, 2001: the aircraft impacts caused significant structural damage and dislodged fireproofing from steel structures, and the subsequent fires, fueled by jet fuel, severely weakened the remaining steel, causing floors to sag and pull inward, leading to the eventual buckling of structural columns and a progressive, total collapse. Aircraft Impacts: The plane crashes damaged and severed steel support columns and dislodged the fireproofing material that protected them. The impacts also cut off water lines to the automatic fire sprinkler systems, preventing them from functioning. Fires: The burning jet fuel ignited large, multi-floor fires. These fires reached temperatures high enough to weaken the steel structures, particularly where the fireproofing had been dislodged. Progressive Collapse: As the steel structures weakened, the floors sagged and pulled inward on the perimeter columns, causing them to bow and buckle. Once a section of the upper floors began to move downward, the weight of the floors above created a chain reaction, leading to a total progressive collapse of each tower. Outcome: The South Tower collapsed first because it sustained more severe structural damage from the initial impact. The official investigations by the National Institute of Standards and Technology (NIST) confirmed that the combination of structural damage and fire-induced weakening was the cause of the collapse. " |
|
|
|