Article 6 | vanhoozier01

Article 6: Why Did the World Trade Center Collapse?

Incorrect statement: The steel could not melt in the flames and there was way more structural damage that just the softening steel.
The World Trade Center was built in the mid-1960 and the early 1970’s.
They were a new approach to skyscrapers, lightweight and included modular construction methods.
To make the towers capable of withstanding high wind speed and storms, a “perimeter cube” design was selected.
The building was about 95% air, which explains why there wasn’t that much debris when the towers collapsed.
The type of construction was redundant, it columns were lost, it could still stand.
The aircraft was a lot less than the impact was able to withstand, the outer perimeter columns were only stressed 1/3 of its 200 MPa design capability.
A great significance to the impact was the many gallons of jet fuel lost in the crash.
The fire was the principle cause of the collapse.
People often confuse temperature and heat, which are fairly different.
The temperature of the fire at the World Trade Center was not unusually hot.
The temperature was far from being able to melt steel.
A jet burner is the type of flame that generates the most heat.
The World Trade Center fire was fuel rich, which explains the black smoke.
It’s unlikely that steel in the crash experienced temperatures higher than 750-800 degrees Celsius.
The steel could have supported two to three times the stresses put on from the World Trade Center fire.
The towers lost too many columns possible for it to stand because of the fire, which is why it collapsed.
The buildings collapsed in about 10 seconds, 200 km per hour.
Since the building was 95% air it could implode on itself.
The world Trade Center want defectively designed, no one would have thought the attack would happen.
The towers only lasted for about 2 hours because the fire fuel load was so big.
After all the debris was cleaned up, the asbestos fire insulation made it hazardous for workplaces nearby.
The building codes for buildings has changes since the World Trade Center attack.
Because of the design, it was impossible for the aircraft impact to topple the building.
Instead of saving the building, engineers and officials want to make it easier to save the people with better evacuation systems.