H-beam steel building is a new economy. H-beam cross-sectional shape economically reasonable, good mechanical properties, rolling uniform cross section extending the points, a small internal stress, compared with ordinary beam, with a section modulus, light weight, saving advantages of metal, can make building structure to reduce the 30-40%; but also because two parallel lateral leg, the leg-side is a right angle, assembled combined into components, saving welding, riveting work amounted to 25%. Commonly used to cut the requirements bearing capacity, stability, good cross-section of large buildings (such as factories, high-rise buildings, etc.), as well as bridges, ships, lifting and transportation machinery, equipment foundation, frame, foundation piles. H-beam is to optimize the mechanical properties developed from a cross-section of more excellent economy by word-section steel beam, especially section and letter "H" the same name. Its features are as follows: ◆ flange width, lateral stiffness. ◆ bending ability, about 5% -10% over the beam. ◆ two surfaces parallel to each other so that the connecting flanges, processing and easy to install. ◆ Compared with welded I-beam, low cost, high accuracy, low residual stress, without expensive welding materials and weld inspection, saving about 30% of steel production costs. ◆ load the same section. Hot-rolled steel H lighter than conventional steel 15% -20%. ◆ Compared with the concrete structure, hot-rolled steel H can be increased by 6% of the use of space, and reduce the structural weight by 20% to 30% reduction in the structural design of internal forces. ◆ H-beam processed into a T-beam, castellated beams may be combined to form a variety of cross-sectional form, great to meet the needs of the engineering design and production.