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Creep (deformation)
Key terms:
wtc
collapse
fires
floors
nist
columns
fema
world trade center
trusses
north tower
perimeter
south tower
nypd
cleanup
fireproofing
aircraft impact
tower collapsed
eagar
deformation
twin towers
perimeter columns
weaken
firefighters
core columns
fire protection
jet fuel
marriott
collapse mechanism
structural engineers
controlled demolition
nist report
aviation unit
impact locations
progressive collapse
world financial center
floor trusses
empire state building
institute of standards and technology
issued orders
pancake collapse
fdny
north tower collapsed
airplane impacts
continued to burn
wtc site
buckled
nist found
civil engineers
south tower collapsed
national institute of standards
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