Building material H-shaped steel

H-shaped steel is a kind of economically efficient profile with more optimized section area distribution and more reasonable strength-to-weight ratio, which is named because its section is the same as the English letter "H". Because all parts of H-shaped steel are arranged at right angles, H-shaped steel has the advantages of strong bending resistance, simple construction, cost saving and light structural weight in all directions.

The section shape is similar to the capital Latin letter H of an economic section profile, also known as universal steel beam, wide edge (side) I-steel or parallel flange I-steel. The cross section of H-shaped steel usually includes two parts: web plate and flange plate, also known as waist and side.

Mainly used for: various civil and industrial building structures; A variety of long-span industrial plants and modern high-rise buildings, especially in areas with frequent seismic activity and high temperature working conditions; Large Bridges with large bearing capacity, good cross-section stability and large span are required; Heavy equipment; Highway; Ship skeleton; Mine support; Foundation treatment and dam engineering; Various machine components.

Advantage

The flange of H-shaped steel is parallel or nearly parallel on the inside and outside, and the end of the flange is at a right Angle, so it is named parallel flange I-steel. The thickness of the web of H-shaped steel is smaller than that of ordinary I-beams with the same height of the web, and the width of the flange is larger than that of ordinary I-beams with the same height of the web, so it is also named wide-rim I-beams. Determined by the shape, the section modulus, moment of inertia and corresponding strength of H-beam are obviously better than that of ordinary I-beam with the same single weight. Used in different requirements of the metal structure, whether it is under bending torque, pressure load, eccentric load show its superior performance, can greatly improve the bearing capacity than ordinary I-steel, saving metal 10% ~ 40%. H-shaped steel has wide flange, thin web, many specifications, and flexible use, which can save 15% to 20% of metal in various truss structures. Because its flange is parallel inside and outside, and the edge end is at a right Angle, it is easy to assemble and combine into various components, which can save about 25% of the welding and riveting workload, and can greatly accelerate the construction speed of the project and shorten the construction period.

There are many product specifications of H-shaped steel, and the classification methods are as follows.

(1) According to the flange width of the product, it is divided into wide flange, middle flange and narrow flange H-shaped steel. The flange width B of the wide flange and middle flange H-shaped steel is greater than or equal to the height H of the web. The flange width B of the narrow flange H-shaped steel is equal to about half of the height H of the web plate.

(2) According to the use of the product is divided into H-type steel beam, H-type steel column, H-type steel pile, extremely thick flange H-type steel beam. Sometimes parallel leg channel steel and parallel flange T-steel are also included in the scope of H-beam steel. Generally, narrow flange H-shaped steel is used as beam material and wide flange H-shaped steel is used as column material, so it is also called beam H-shaped steel and column H-shaped steel.

(3) According to the production method, it is divided into welded H-beam steel and rolled H-beam steel. (4) According to the size specifications are divided into large, medium and small H-shaped steel. Usually the web height H above 700mm products are called large, 300 ~ 700mm is called medium, less than 300mm is called small. By the end of 1990, the world's largest H-shaped steel web height was 1200mm and the flange width was 530mm.