täysperävaunu

Täysperävaunu is a Finnish term referring to a specific type of semi-trailer. It is characterized by having its own axles and being supported by a kingpin that connects to a fifth wheel coupling on the towing vehicle. Unlike a full trailer, which is towed by a drawbar, a täysperävaunu relies entirely on the tractor unit for support when coupled. These trailers are commonly used in commercial road transport for hauling large quantities of goods.

The design of a täysperävaunu allows for a high degree of maneuverability, especially when combined with a tractor unit, as the trailer can articulate around the fifth wheel. They are built in various configurations to accommodate different types of cargo, including flatbeds, box trailers, refrigerated units, and tankers. The weight of the cargo is distributed between the trailer's axles and the rear axles of the towing tractor. In Finland, as in many other countries, regulations govern the dimensions, weight, and configurations of täysperävaunu units to ensure road safety and efficient logistics. The term is often contrasted with 'puoliperävaunu', which translates to semi-trailer, but in common Finnish usage 'täysperävaunu' specifically denotes the fully articulated trailer unit.