Unequal-leg angle steel is a type of steel used in construction. One end of it is a flat plate with an unequal leg angle, while the other end is a steel pipe with a conical round hole. This steel can be used to manufacture various building structures, such as bridges, elevated railways, and highways. The advantages of unequal-leg angle steel include high strength, corrosion resistance, ease of processing, as well as good ductility and toughness, which can meet various complex construction requirements. The production standard for unequal-leg angle steel is GB/T706-2016, and its material is generally Q235B or Q345B, with dimensions ranging from 2.5mm to 80mm. It should be noted that the model of unequal-leg angle steel is determined by its cross-sectional area, and different models have different cross-sectional areas and weights. During the production and processing of unequal-leg angle steel, some treatments such as rust removal and bundling are also required to ensure its quality and applicability. As an important construction steel material, unequal-leg angle steel has been widely used in the construction industry and has made significant contributions to our urbanization construction.