Prefabricated outdoor helical staircase of reinforced concrete clad in white Okite. The cantilevered steps of the staircase has a self-supporting structure and are fixed on a rounded wall. The stair platform is straight, the central column is of stainless steel. The railing is also made of stainless steel profiles. The modern staircase has essential and linear shapes. It is made of the materials obtained using innovative techniques. All above makes this staircase a functional and stylish piece of furniture.