Outdoor steel stairs welded steel stairs are known for their low support points, high load-bearing capacity, multiple shapes, and high technical content. Not easily affected by structures such as columns and floors, sturdy and firm. The steel plates used to weld the stairs have been accurately welded through debugging, so the pedals are uniformly horizontal in all directions after installation. And all material accessories are horizontal and vertical. There are various materials for welding stairs, including square pipes, round pipes, angle irons, channel steels, and I-beams. There should be more diverse styles for this design.