I-beam, also known as steel beam, features a cross-section in the shape of an "I" and is a long steel product. Additionally, I-beams are categorized into three types: standard, light, and wide flange. The wide flange type further comes in three widths: wide, medium, and narrow.

Wide flange I-beams generally come in widths ranging from 10 to 60 sizes, which correspond to heights of 10 to 60 cm. Moreover, lightweight I-beams, at the same height, have a narrower web and are lighter in weight.