What are the differences between I-beam and H-beam?
The flange of I-shaped steel has a variable cross-section that is thicker on the web and thinner on the outside; the flange of H-shaped steel is of equal cross-section, and h-shaped steel is divided into three categories: narrow flange, wide flange and steel pile, and their codes are hz, hk and hu. Narrow flange H-shaped steel is suitable for beams or compression-bending members, while wide-flange H-shaped steel and H-shaped steel piles are suitable for axial compression members or compression-bending members. Compared with H-shaped steel, under the premise of equal weight, w, ix and iy are not as good as H-shaped steel. So what are the differences between H-shaped steel and I-shaped steel?
1. Whether H-shaped steel is ordinary or light, its cross-sectional size is relatively high and narrow, so the moment of inertia of the two main sleeves is very different. Therefore, it can only be used directly to bend components in webs or to form lattice-type stress members. It is not suitable for axial compression members or perpendicular to webs and curved members, so it has great limitations in application;
2. H-shaped steel is a high-efficiency and economical steel (other types include cold-formed thin-walled steel, pressed steel plates, etc.). Due to the reasonable cross-sectional shape, the steel can be made more effective and its load-bearing capacity can be improved. Different from ordinary section steel, the flange of H-section steel is widened and the inner and outer surfaces are parallel, making it easy to connect with other high-strength laurels. Its size is reasonable and the models are complete, making it easy to design and select;
3. The flange thickness of H-shaped steel is equal, and the rolled section and combined section are welded by three steel plates. Due to poor production technology, the inner edge of the flange has a slope of 1:10. The rolling process of H-shaped steel is different from that of ordinary I-shaped steel, using only a set of horizontal rollers. Because its flange is wide and not tilted (or tilted slightly), a set of vertical rollers must be set up to roll at the same time. The height of H-shaped steel produced in China is 800 mm, which is higher than the welded combination.