Prefabricated indoor helical stairs of reinforced concrete with self-supporting steps clad in Yellow Zafferano Marble Gloss. This modern staircase is two-storey and has linear and simple forms. The steps are fixed to the wall from one side and they are complemented with a modern stainless steel railing. The light marble is in harmony with the color of the walls. The structure is made using advanced techniques and materials are of high quality to guarantee the durability.