H-Beam steel is a kind of economic section high-efficiency profile with more optimized section area distribution and more reasonable strength-weight ratio. It is named because its section is the same as the English letter “H”. Because H-beam is arranged at right angles in all parts, H-beam has the advantages of strong bending resistance, simple construction, cost saving and light weight in all directions, and has been widely used.
Characteristics of H-Beam steel:
The inner and outer flanges of H-Beam steel are parallel or close to parallel, and the ends of flanges are at right angles, so it is named parallel flange I-beam. The web thickness of H-beam is smaller than that of common I-beam with the same height of web, and the flange width of h beam is larger than that of common I-beam with the same height of web. Depending on the shape, the section modulus, moment of inertia and corresponding strength of H-section steel are obviously superior to those of ordinary I-section steel with the same single weight. When used in metal structures with different requirements, both bearing bending moment, pressure load and eccentric load show its superior performance. Compared with common I-beam, it can greatly improve the bearing capacity and save 10%-40% of metal. H-section steel has wide flange, thin web, many specifications and flexible use. It can save 15%-20% of metal in various truss structures. Because of its parallel inner and outer flanges and right angles at the ends of flanges, it is easy to assemble and assemble various components, thus saving about 25% of welding and riveting workload, greatly accelerating the construction speed of the project and shortening the construction period.
Use of H-beam:
Because of the above advantages, H-section steel is widely used, mainly for various civil and industrial building structures; various large-span industrial buildings and modern high-rise buildings, especially in areas with frequent seismic activity and under high temperature working conditions; large bridges with large bearing capacity, good cross-section stability and large span; heavy equipment; highway; ship skeleton; mine support. Foundation treatment and embankment engineering; various machine components.
Classification of H-beam:
There are many specifications for H-beam products. There are several classification methods. (1) According to the flange width of the product, it can be divided into wide flange, middle flange and narrow flange H-section steel. The flange width B of H-section steel with wide and middle flanges is greater than or equal to the web height H. The flange width B of narrow flange H-section steel is about half of the web height H. (2) According to the use of the product, it can be divided into H-shaped steel beam, H-shaped steel column, H-shaped steel pile and H-shaped steel beam with extremely thick flange. Sometimes parallel leg channel steel and parallel flange T-shaped steel are also included in the scope of H-beam. Generally, narrow flange H-section steel is used as beam material, wide flange H-section steel is used as column material, accordingly, beam H-section steel and column H-section steel are called. (3) According to the mode of production, it can be divided into welding H-beam and rolling H-beam. (4) H-beams of large, medium and small sizes are classified according to their size and specifications. Usually, products with web height H above 700 mm are called large, 300-700 mm are called medium, and those with web height H below 300 mm are called small. By the end of 1990, the world’s largest H-beam webs had a height of 1200 mm and a flange width of 530 mm.