Interesting fact about those whole truck dumping systems: There is a small vent that you have to open at the front of the trailer BEFORE you raise it to dump o

Interesting fact about those whole truck dumping systems: There is a small vent that you have to open at the front of the trailer BEFORE you raise it to dump out the contents. Failure to do so leads to a vacuum effect that can implode the trailer as the biomass pours out Source: friend of mine worked in the paper industry and this was a somewhat regular occurence