The angle steel is mainly used to make frame structures, such as high-voltage transmission towers, frames on both sides of the main beam of steel structure bridges, columns and booms of tower cranes on construction sites, columns and beams of workshops, etc., small places such as flower pot shaped shelves at the festival roadside, and shelves with air-conditioning and solar energy hung under windows. Angle steel is also widely used in building structures and engineering construction, such as house beams, power transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouse shelves.