According to the latest safety regulations, bulk materials may be transported by truck only when covered with a tarpaulin. SIKU is implementing this latest regulation in the playroom as well. The Mercedes Actros tractor pulls a 3-axle tipping semi-trailer with movable tipper and removable roof tarpaulin made from flexible plastic material. The rear flap of the tipper is movable. This can be opened with or without the roof tarpaulin being fitted.