Steel structure stairs can be roughly divided into indoor steel structure stairs and outdoor steel structure stairs. Indoor steel structure stairs are often used for duplex units and partitions. When designing, they need to be coordinated with other decorative surfaces to achieve consistency in the overall design style; Outdoor steel frame buildings and indoor staircases are often used for fire protection and evacuation in industrial plants, residential buildings, commercial buildings, and other areas. Compared with concrete structure indoor stairs, steel structure stairs have lower requirements for structures such as columns and floors, fewer support points, higher bearing capacity, diverse design styles, and are widely used in various engineering construction projects.