I-beam, also known as Universal Beam, is a long steel bar with an I-shaped cross section. I-beams are divided into ordinary I-beams and light I-beams. It is a steel profile with a I cross-sectional shape. I-beams are mainly divided into ordinary I-beams, light I-beams and wide flange I-beams. Wide flange I-beam, also known as H-beam, is characterized by parallel legs and no slope on the inside of the legs.