After the grape harvest, the trucks must be weighed before and after unloading the fruits in the wine cellar. This task can be easily performed on spot with portable wheel load scales. The density of vegetables can vary greatly. As a result, many trailers are unknowingly overloaded, putting both the driver and other road users at risk. Incorrectly loaded or overloaded vehicles are difficult to control. A complicated situation is when an absorvent load like wood is uncovered. if it rains, the original weight will be increased with the absortion of water and the new weight is uncertain. A subsequent weight control on spot could prevent fines and in the worst case accidents.