Also known as I-beam steel beam, the cross-section-shaped steel bar. Its specifications to waist high (h) * leg width (b) * waist thick (d) of the coin number, such as "work 160 * 88 * 6", it means that the high waist of 160 mm, leg width of 88 mm, thick waist 6 mm beam. I-beam model specifications can also be used, said that waist-high models of a few centimeters, such as working 16 #. The same beam waist high, if several different legs wide and thick waist, plus abc model the right to be different, such as 32a # 32b # 32c # and so on. I-beam sub-ordinary beam and light beam, hot rolled ordinary beam specifications for the 10-63 #. Hot-rolled ordinary beam specifications supplied by the agreement between the 12-55 #. I-beam used in a variety of building structures, bridges, vehicles, brackets, machinery and so on.