This type of body was developed at the birth of motorised commercial vehicles. The tailgate and sideboards are intended to protect the load from falling, while the material cover protects it against the rain. In general this type of body provides a high level of flexibility. This was increased considerably by the Edscha TS invention of the sliding roof in 1969. With this body the loading process is much faster and safer today, as the cargo space can be opened up very quickly by pushing the entire tarpaulin towards the bulkhead.