This model of metal stairs is a popular model among customers and designers. Due to the modern appearance of the metal staircase of the middle structure and the high transparency of this type of staircase, it has attracted many people. In this metal duplex metal stair model, the stair structure is executed from under the floor of the stairs and with a distance from the edge of the floor of the stairs as single axis and double axis. Due to the free head of the bottom of the stairs in this model, the feeling of console and suspension is given to the stairs. The metal stairs of the middle structure are designed as round metal stairs and simple stairs.