A few loony right-wing bloggers have grasped the story of the fuel tanker that crashed, exploded and caused a freeway bridge to collapse due to the fuel burning and weakening the structure near Oakland, San Francisco, as proof that burning fuel is able to bring down tall buildings.
So desperate are they to rebut the assertion of engineers and scientists that fuel can’t possibly have caused the WTCs to have collapsed that they have jumped on the story as proof that 9/11 did happen the way the government reckoned after all. However, they have forgotten to stop and consider 1) what kind of fuel caused the bridge in San Francisco to collapse and 2) The two totally different types of structures.
The reality is that the fires in the WTCs were fuelled by Jet-A1 fuel which has a free air burn temperature of between 500°F and 599°F, nowhere near enough to weaken, let alone melt, high-strength steel columns which were the primary structural material used in the buildings. The tanker that crashed and burned causing the bridge to collapse on the other hand was carrying 8600 gallons of unleaded gasoline which exploded right under the bridge causing temperatures to reach some 2000°F which is enough to severely weaken the bridge structure and cause it to collapse.
The other aspect not taken into account in this ill-considered comparison is the fact that the two structures are totally different. The most obvious is; the WTC towers are vertical whereas the bridge structure is horizontal. The other difference is that the primary structure of the WTCs is massive steel columns whereas the structure of the bridge is reinforced concrete, a material that is given to cracking when subjected to sudden high temperatures. It is clear from the photographic evidence that the collapse of the bridge was caused by a combination of the heat and the force of the explosion.
The fairy-story believers are grasping at straws!