Van Walraven supplies a wide range of ACO and BIRCO drainage systems. By using linear drainage channels the drop is simplified creating gentle slopes and preventing annoying puddles from accumulating. Drainage is faster due to the larger surface area and the grates, and the smooth channel wall, furthermore, it is possible to build in the drop with a cascade. Van Walraven is happy to advise you in the choice of width, height and type of grate for the channel to achieve the best results. The load bearing class required is one of the key criteria when choosing a linear drainage system. These are described in the NEN-EN 1433 standard.