Halfway through the discussion with Steven Jones, a steel welding expert joined the conversation to express his incredulity at the fact that Fox News was comparing the collapse of the highway with the World Trade Center buildings.
"You can't even begin to compare 5 inch thick steel plate core columns, approximately 2 foot by 5 foot rectangle 5 inch thick boxes to quarter inch and 3 quarter inch dowels that connect the steel to the support members," said the steel expert.
"The logical deduction is that the rebar steel was exposed horizontally, that whole bridge surface and it was exposed intention, not like the fires that were lapping up fire-proofed 5 inch thick plate columns in the World Trade Center - these little bars had no heat sink and after two hours with all that weight on them they fell."
Debunkers have also failed to acknowledge the fact that freeways in the San Francisco area have already been weakened by multiple earthquakes and regularly collapse entirely of their own accord by accident.
Highway sections across the country have collapsed with no fire damage whatsoever being involved, including a case in Oklahoma in 2002 when a 500-foot section of an Interstate-40 bridge collapsed after barge collided with a bridge support.
to quickly recap:
White-hot 200 foot flames acting on a single truss (and no ability to redistribute the load once weakened.)
No molten metal and certainly no thermate found
No column failure
No evaporation / pulverization of concrete
No "pancake collapse"