Connecting palisade with the diameter of 200 mm has a circular cross-section with partial indentation with the same radius. The resulting tongue-and-groove joint provides a particular dry connection that allows for the transfer of large lateral loads. These properties are also preserved in arched arrangements. The internal axial cavities significantly improve the ease of laying and strength of the structure. The distinctive outline of the palisades, various height options and the possibility to rotate the elements vertically make it possible to achieve beautiful regular lines with any shape.