dalvorius wrote:Maybe it was diet-pizza?
It was lighter than a normal load, so the suspension was a bit higher than usual?

Probably a truck/trailer combo that shouldn't have been put together.
The height of the fifth wheel can vary depending on how the truck was spec'd. If the truck is usually used for tanks it may be higher to help with unloading. Tanks aren't as tall as box trailers. The actual height of the box trailer at the nose varies as well. They make trailers with a shorter nose height to use with truck which have higher fifth wheels. Add the fact that not all 13'6" bridges exceed that height by any appreciable margin...
Put a truck with a high fifth wheel under a trailer with a tall nose and you just might scatter your load across the highway...
A perfect storm, really. Should not have happened.
"A man is like a bicycle: Stop pedaling and you crash. You have to keep going" -- Emerson Fittipaldi