Steel stairs are the product of the industrial age and were widely used in factories before. In recent decades, with the emergence of many high-tech style buildings, their characteristics include aesthetic characteristics: a large number of industrial metal materials are used to expose the structural components of buildings. These characteristics are reflected in many buildings, and steel stairs are an important element to express their characteristics. The outdoor steel staircase of Pompidou Center in Paris forms a perfect combination with the scaffolding-like building facade. There are many forms of steel stairs, but most of them form a physical rhythm contrast with the surrounding space through stretched lines. The structural support system of steel stairs takes the steel inclined beam of the stairs as the main structural component, and the stair steps are mainly steps, and the railing form generally adopts the diagonal parallel to the inclined beam of the stairs.

Steel stairs can also be made very simple. Z-shaped steel stairs are welded by continuous Z-shaped steel plates, and the folded part is fixed to the wall, without any other redundant design, which can be said to be the perfect combination of creative ideas and simple structure. Circular stairs are widely used in steel stairs. In the three-dimensional space, spiral stairs show a sense of movement and elegance through rows of pedals and handrails, which can be said to embody the aesthetic feeling of the spatial skeleton of steel stairs incisively and vividly. Spiral staircase can be said to be similar to circular staircase, but its structural support mode is based on the central steel column, and the stair steps are selected from the steel column as cantilever beams and arranged along the spiral. Steel stairs are used in residential buildings to solve the problem of narrow internal space. In a residential building designed by a Japanese architect, a steel staircase is designed along the street, and the stepped grille steel plate and stepped staircase inclined beam on one side are industrialized as a whole, forming a structural logical relationship with the building with exposed steel structure. However, the steel staircase in a European building is made of square steel as a whole because of its inclined slope, and the surrounding building components are also made of the same material, so its line composition and proportional relationship have become the focus of space interior design.