H-beam is an economic section high-efficiency profile with more optimized cross-sectional area distribution and more reasonable weight-to-weight ratio. It is named because its section is the same as the English letter ‘H’. Since all parts of the H-shaped steel are arranged at right angles, the H-shaped steel in steel h profile manufacturer has the advantages of strong bending resistance, simple construction, cost saving and light weight in all directions, and has been widely used.
I-shaped steel, whether it is ordinary or light, because the cross-sectional dimensions are relatively high and narrow, the difference between the two main sleeves has a large difference in the moment of inertia. Therefore, it can only be used directly on the web plane. The internally bent members or they are combined into a lattice-type force member. It is not suitable for the axial compression member or the member that is curved perpendicular to the plane of the web, which makes it have a large limitation in the application range.
H-beam is a highly efficient economical profile (others are cold-formed thin-walled steel, profiled steel, etc.). Due to the reasonable cross-sectional shape, they can make steel more efficient and improve load carrying capacity. Unlike the normal I-shaped type, the flange of the h-shaped steel is widened, and the inner and outer surfaces are usually parallel, which facilitates the connection with high-strength bolts and other members. Its size constitutes a reasonable series, the model is complete, easy to design and use.
H-shaped steel flanges are of equal thickness, with rolling sections, and also have a combined section composed of three plates welded. I-beams are all rolled sections, and due to poor production processes, there is a 1:10 slope inside the flange. H-beam rolling differs from ordinary I-beams in that only one set of horizontal rolls is used. Since the flanges are wide and have no slope (or a small slope), a set of vertical rolls must be added and rolled simultaneously. Its rolling process and equipment are more complex than ordinary rolling mills. The maximum rolled h-shaped steel that can be produced in China is 800mm in height, which can only exceed the welded composite section. China’s hot-rolled H-beam national standard (GB/T11263-1998) divides H-shaped steel into three types: narrow flange, wide flange and steel pile, and their codes are hz, hk and hu. Narrow flange H-beams are suitable for beam or compression-bending components, while wide-flange h-beams and h-beams are suitable for axial compression or compression members. Compared with H-shaped steel, I-beam is not as good as h-shaped steel under the premise of equal weight.