Semi-trailers are primarily used for transporting large, bulky goods that are difficult to disassemble, such as excavators. Flatbed trailers are suitable for transporting perishable goods like vegetables and fruits, while box trailers are better suited for transporting loose cargo and valuable, moisture-proof items.
Unlike full trailers, semi-trailers have their axles located behind the vehicle's center of gravity (when the vehicle is evenly loaded) and are equipped with a coupling device that transmits horizontal or vertical forces to the tractor unit. Generally, full trailers have two axles, while semi-trailers have one. A semi-trailer is a vehicle without its own power, sharing load with the tractor unit and relying on it for towing.
Simply put, a full trailer is connected to the preceding truck by a hook. A semi-trailer is connected to the tractor unit via a towing pin. Common container trucks are typical semi-trailer trains, with the cargo section at the rear being the semi-trailer.
Their uses also differ. Full trailers are mainly used for short-distance transport within factories, ports, docks, and warehouses, while semi-trailers are primarily used for long-distance cargo transport.
