you are viewing a single comment's thread.

view the rest of the comments →

[–][deleted] 1 insightful - 2 fun1 insightful - 1 fun2 insightful - 2 fun -  (3 children)

The towers were not built following the original designs. A spray on foam was used instead of concrete over the beams. Chesp redesign right from the start. Built to fail.

[–]Tom_Bombadil 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (2 children)

Insulating spray foam protects steel during fires.

Kevin Ryan confirmed this at UL, which contradicted/debunked the first official story.

[–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (1 child)

The original design called for concrete, not spray foam which can flake off.

[–]Tom_Bombadil 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

Source?

Edit: FYI - This spray foam can resist shotgun blasts. It is quite resilient.