Partly true:
Paging Dr. Rosie: Did Schwarzenegger Demolish Bay Bridge Interchange?
Collapse A gasoline tanker caught fire underneath an offramp from the San Francisco Bay Bridge this morning, causing a 250-foot section of the overpass to collapse. That’s what they want you to believe, anyway.
Let’s look at the facts in the manner taught us by our nation’s foremost civil engineer and demolition expert.
— The overpass was made of concrete and steel rebar. This would mark only the 4th time in history that fire has melted steel. The first 3 of course trace back to the morning of 9/11, when - the government would have you believe - burning jet fuel miraculously managed to weaken steel to the point of bringing down WTC 1, 2, and most notably, WTC 7, which housed secret WorldCom and Enron e-mails.
— The collapsed section of the so-called MacArthur Maze, which distributes traffic to and from the Bay Bridge, is said to be “draped like a blanket” over the roadway below (damning images of collapse available here), clearly suggesting a controlled, orderly demolition.
http://suitablyflip.blogs.com/suitably_flip/2007/04/paging_dr_rosie.html
The steel doesn’t have to be melted to cause a major structural failure. A little expansion in area while adjoining areas are not expanding, or a little bending, is enough to do the trick in a structure supporting a huge load of concrete and relying on very precise engineering.