Beam is a new type of economical construction steel. The cross-sectional shape of H-beam is economically reasonable, with excellent mechanical properties. During the rolling process, the extension of each point on the cross-section is relatively uniform, and the internal stress is small. Compared with ordinary I-shaped steel, it has the advantages of a larger section modulus, lighter weight, and metal saving. It can reduce the building structure by 30-40%. Moreover, because the inner and outer sides of the legs are parallel and the leg ends are right angles, when assembled and combined into components, the amount of welding and riveting work can be saved by 25%. It is commonly used in large-scale buildings (such as factories, high-rise buildings, etc.) that require high bearing capacity and good section stability, as well as bridges, ships, lifting and transportation machinery, equipment foundations, supports, and foundation piles.

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