Clermont, Fla- Semi Trailer Folds Up In Middle With Heavy load

Well if that load was sealed when the trucker picked it up,this may be on the loaders.
However all my years as a city driver,whenever I hooked an over weight loaded trailer.
I surely could tell it was over when I raised the landing legs,& it was mashing my rear duals.
Weight was probably not the issue....a old trl + load not loaded properly causes this....I see this all the time...corrosion gets to the cross members of these old trls and they buckle.