Vehicle attachment device for a semi-trailer or the like

A vehicle body device (10) for a semi-trailer (12), vehicle trailer, vehicle or the like, characterized in that the device (10) is designed as an autonomously operable drying room (20) for wooden pallets (50), wherein the device in one embodiment has the following features: a drying room (14) with a storage surface (46) for the pallets (50), an air duct system (32, 34, 36, 38, 40, 42, 44) with a fresh air duct (42) communicating to the outside and an exhaust air duct (44), which is in communication with the drying room (14), at least one fan for generating an air flow within the air duct system (32, 34, 36, 38, 40, 42, 44), a burner (18) for heating the air within the air duct system (32, 34, 36, 38, 40, 42, 44), an energy storage device (20) for supplying power to the burner (18), and a control device (30) for controlling the process sequences and temperatures in the drying room (14) before, during and after the drying process of the pallets (50).