Engineering professor explains I-95 bridge collapse after large fire

https://youtu.be/wxIRLJ-98ps

2 minute tv news report

engineering professor from UMass Lowell

not sure that I totally agree - 1300 design temperature vs 1700 fire temperature

( 1 minute of fire vs 45 minutes of fire - ??? )

remember - FD said the fire was under control in 1 hour - which might
be how long it takes for 8,000 gallons of gasoline to burn up