H-beam is an economical section with a more optimised cross-sectional area distribution and a more reasonable strength-to-weight ratio, so named because its section is the same as the letter "H". Because all parts of H-beams are arranged at right angles, H-beams have the advantages of high bending resistance in all directions, simple construction, cost saving and light weight, and have been widely used. An economic section profile with a shape similar to the capital Latin letter H, also called universal steel beam, wide edge (edge) I-beam or parallel flange I-beam. the cross section of H-beam usually includes two parts, the web and the flange plate, also known as the waist and the edge.