Central pipe model metal stairs with minimal space occupation for a vertical connection, this type of stairs, which are often used commercially, are usually used to connect two floors with a small area. In this type of stairs, the main structure of the stairs consists of a pipe in the center of the stairs in a complete or spiral form and a sword on the bottom of the stairs. Considering the concentration of stairs in a small area and space, this collection has tried to create an element and a sculpture in that space by creating variety in this model of stairs.