H-steel is mainly divided into ordinary I-steel light I-steel and wide flange I-steel according to the height ratio of flange and web and divided into wide medium width narrow wide flange I-steel before the two production specifications for 10 60, that is, the corresponding height is 10 cm 60 cm at the same height, light I-steel flange narrow web thin weight light Wide flange I-beam is also known as H-beam, the section is characterized by two legs parallel, and the inside of the leg is not oblique it belongs to the economic section steel, is rolled on the four-roller universal rolling mill, so also known as universal I-beam ordinary light I-beam has formed a national standard.