Molded block for pavements etc. has jacket and side faces with interlocking projections and apertures of different sizes/profiles, to form drainage channels

摘要

The block has jacket faces (2,3,4,5) and cover faces (9,10), each having at least one aperture and one projection. One first long aperture (6) is located in and extends along one jacket face, and a first long projection (7) is located in and extends along a second jacket face. A first cover face has a second long aperture (11), extending at right angles or parallel to a connection line (14) between first aperture and projection. A second cover face has a second long projection (12), extending at right angles or parallel to the second aperture. Apertures and projections have mainly trapezoidal profiles, and when engaged, define hollow spaces. The block is pref. of concrete.