Drainage and water storage element made of thermoformed polystyrene, used
for driveways and parking lots; can be installed on inverted roofs. Extremely solid;
maximum load bearing capacity (without infill) ca. 500 kN/m2; installation with
overlapping, therefore ca. 3 % surplus required; weight: ca. 3 kg/m2; height: ca.
32 mm. Specially shaped lateral studs allow for interlocking connection of the boards.