Abstract: A molded base element includes a base element body having a substantially rhomboid longitudinal sectional shape and formed of two side walls intersecting one another along a longitudinal direction. Each of the side walls extends between longitudinally spaced cut surfaces and has a base surface adjacent a free end thereof opposite the intersection of the side walls. Slots or holes can be formed at the flattened surface at the line of intersection. Alternatively, grooves can be formed on the inner or end surfaces of the walls.