Petrol stations and service stations see vehicles driving on their surfaces every single day. Heavy goods vehicle traffic in particular poses a real challenge for the drainage systems installed in such areas. They have to be able to withstand the horizontal and shear forces that occur and which, depending on the load, can lead to material fatigue on the trench body, the frames and the gratings. With its cast-iron monolithic design and a load class of up to F 900, the HYDROblock system is ideally suited for this application, even as a sanitation drainage channel.