H-shaped steel is an economical cross-section and high-efficiency profile with more optimized cross-sectional area distribution and more reasonable strength-to-weight ratio. It is named because its cross-section is the same as the English letter "H". Since all parts of H-shaped steel are arranged at right angles, H-shaped steel has the advantages of strong bending resistance in all directions, simple construction, cost saving and light structural weight, and has been widely used.

The inner and outer sides of the flanges of H-shaped steel are parallel or close to parallel, and the flange ends are at right angles, hence the name parallel flange I-beam. The web thickness of H-shaped steel is smaller than that of ordinary I-beams with the same web height, and the flange width is larger than that of ordinary I-beams with the same web height, so it is also called wide-edge I-beam. Determined by its shape, the section modulus, moment of inertia and corresponding strength of H-shaped steel are significantly better than ordinary I-beams of the same unit weight. Used in metal structures with different requirements, it shows its superior performance whether it bears bending moment, pressure load, or eccentric load. It can greatly increase the load-bearing capacity compared with ordinary I-beams and save 10% to 40% of metal. H-shaped steel has wide flanges, thin webs, multiple specifications, and flexible use. It can save 15% to 20% of metal when used in various truss structures. Because the inner and outer sides of the flange are parallel and the edge ends are at right angles, it is easy to assemble and combine into various components, thus saving about 25% of the welding and riveting work, which can greatly speed up the construction speed of the project and shorten the construction period.
Usage: Due to the above advantages, H-shaped steel is widely used, mainly used in: various civil and industrial building structures; various large-span industrial plants and modern high-rise buildings, especially industrial plants in areas with frequent seismic activity and under high-temperature working conditions. ; Large bridges that require large load-bearing capacity, good cross-sectional stability, and large spans; heavy equipment; highways; ship frames; mine support; foundation treatment and dam engineering; various machine components.