What is a semi tipper trailer?   Tipper Semi Trailer are also called dump trucks, dumper trailer, side tipper, tip trailer, scrap dump trailer. In civil engineering, it often works in conjunction with excavators, loaders, belt conveyors and other construction machinery. The dump trailer carriage adopts rear-dump and side -dump self-unloading methods, which improves the efficiency of the bulk cargo transport by the loader. The semi truck trailer tipper carriage is inclined at a certain angle, so that the cargo in the carriage is unloaded. The power of the dump truck trailer engine is used to complete the dumping mechanism.