I-beam is mainly divided into ordinary I-beam, light I-beam, low alloy light I-beam.

The wing of ordinary I-beam and light I-beam gradually thinner from the root to the side, with a certain Angle. The type of ordinary I -beam and light I-beam is expressed by the Arabic number of its waist height in centimeters. . I-beam is mainly used in building structure, curtain wall engineering, mechanical equipment ,vehicle manufacturing and so on.