The curbstone represents the volume stuck together form from marble 20 mm thick. It is made hollow, with reinforcing ribs throughout the internal volume and filled with aerated concrete. All gluings are made through an angle of 45°, and instead of chamfers, to retouch the seams, the edges are processed with a small radius cutter. The necessary anti-skid stripes on the steps are applied with a slight depth and polished to hide the appearance of processing.
Making a marble stair pedestal