H-section steel features flanges that are parallel or nearly parallel on both the inner and outer sides, with the flange ends forming right angles, hence the name Parallel Flange Beam. The web thickness of H-section steel is thinner than that of a standard I-beam with the same height, while the flange width is wider, leading to the alternate name Wide Flange Beam. Due to its shape, the H-section steel boasts significantly higher section modulus, moment of inertia, and corresponding strength compared to a standard I-beam of the same weight. Employed in various metal structures, it demonstrates superior performance in bearing bending moments, compressive loads, and eccentric loads, greatly enhancing load-bearing capacity and saving metal by 10% to 40%. With wider flanges, thinner webs, a variety of specifications, and flexible usage, H-section steel can save metal by 15% to 20% in various truss structures. Its parallel flanges and right-angled ends facilitate assembly and combination into various components, saving approximately 25% in welding and riveting work, significantly accelerating construction speed and shortening project duration.