H-beams are the structural steel profile shaped like an H in section.It is incredibly strong. It gets its name because it looks like a capital H over its cross section. The horizontal elements of the "I" are flanges, while the vertical element is the web.The web resists shear forces while the flanges resist most of the bending moment experienced by the beam.
Beam theory shows that the H-shaped sections is a very efficient form for carrying both bending and shear loads in the plane of the web. H-beams are widely used in the construction industry and are available in a variety of standard sizes. H-beams may be used both as beams and as columns.

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.

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