FAQs: NIST WTC 7 Investigation

Government Record · National Institute of Standards and Technology · September 10, 2021

NIST's answers to public questions about Building 7, including its account of the fire-induced collapse.

Heating of floor beams and girders caused a critical support column to fail, initiating a fire-induced progressive collapse that brought the building down.

Question 6
Official source

NIST's answers to public questions about Building 7, including its account of the fire-induced collapse.

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