Introduction to H-beams
(14/3/2024)
H-beam is a cross-section area distribution is more optimized, the strength-to-weight ratio is more reasonable economic cross-section of high-efficiency profiles, because of its cross-section and the English letter “H” the same and the name.
H-beam is a kind of high-efficiency profile with economic section, which is named because its section is the same as the letter “H”. Since all parts of H-beam are arranged at right angles, H-beam has the advantages of strong bending resistance in all directions, simple construction, cost saving and light structural weight, etc. It has been widely used in the industry.
H-beam has been widely used because of its strong bending resistance in all directions, simple construction, cost saving and light weight structure.
H-Beam Characteristics
The inner and outer flanges of H-beam are parallel or close to parallel, and the end of flange is at right angle, so it is named parallel flange I-beam.
The thickness of the web of H-beam is smaller than that of the ordinary I-beam with the same height of the web, and the width of the flange is larger than that of the ordinary I-beam with the same height of the web, so it is also named as wide-edge I-beam. Determined by the shape, the
The section modulus, moment of inertia and corresponding strength of H-beam are significantly better than that of ordinary I-beam with the same single weight. H-beams are used in metal structures with different requirements, whether they Whether it is to bear bending moment, pressure load, eccentric load shows its superior performance, can be compared with the ordinary I-beam greatly improve the carrying capacity, saving metal 10% ~ 40%.
H-beam has wide flange, thin web, many specifications, flexible use, and can save 15%～20% of metal when used in various truss structures. Because of its wing
Because the inner and outer edges are parallel and the edge end is at right angle, it is easy to assemble and combine them into various components, which can save welding and riveting workload of about 25%, and can greatly speed up the construction speed and shorten the construction period.
It can greatly speed up the construction of the program and shorten the construction period.
H-beam Usage
Because of the above advantages, H-beam steel is widely used, mainly used for: all kinds of civil and industrial building structures; all kinds of large-span industrial buildings and modernized high-rise buildings; especially in areas with frequent seismic activity and high temperature working conditions; the requirement of large load-bearing capacity, good section stability, large span
Modernization of high-rise buildings, especially in areas with frequent seismic activity and high-temperature working conditions of the industrial plant; requirements of large load-bearing capacity, good stability of the cross-section, large-span large bridges; heavy equipment; highways; ship skeleton; mine support; foundation treatment and dam projects; a variety of machine components.
H-beam Classification
There are many product specifications of H-beam, and there are several ways to categorize them.
1) According to the flange width of the product is divided into wide flange, center flange and narrow flange H-beam. The flange width B of wide flange and medium flange H-beam is greater than or equal to the height H of the web.
The flange width B of narrow flange H-beam is equal to one half of the height H of the web.
2) According to the use of the product is divided into H-beam, H-beam column, H-beam pile, very thick flange H-beam. Sometimes also will parallel leg channel steel and parallel flange butyl
Steel is also included in the scope of H-beam. Generally narrow flange H-beam as beam material, wide flange H-beam as column material, according to which there are beam H-beam and column H-beam.
H-beam steel and column H-beam steel accordingly.
3) According to the production method is divided into welded H-beam and rolled H-beam.
4) According to the size specification size is divided into large, medium and small H-beam. Usually the web height H in 700mm above the product is called large, 300 ~ 700mm
The called in the number, less than 300mm is called small. To the end of 1990, the world’s largest H-beam web height of 1200mm, flange width of 530mm.
Internationally, the product standard of H-beam is divided into two categories: imperial system and metric system. The United States, Britain and other countries use the English system, China, Japan, Germany and Russia
Ross and other countries use the metric system, although the British system and the metric system use different units of measurement, but the H-beam steel is mostly used in four sizes to indicate their specifications, namely: web
Despite the different units of measurement used in the imperial and metric systems, H-beams are mostly expressed in four sizes, namely: web height h, flange width b, web thickness d and flange thickness t. Although the size of H-beam dimensions are expressed differently in different countries around the world. But the production
The product size specification range and size tolerance is not much difference.
H-beam conventional classification
Wide flange HW (Wide): that is, the flange width of H-beam and H-beam height of the basic zd. Mainly used for steel core column in reinforced concrete frame structure column, also known as reinforced steel column; mainly used for column in steel structure.
Middle flange HM (Middle): the flange width of H-beam is slightly smaller than the height of H-beam, and the ratio of H-beam height and flange width is roughly 1.33~~1.75, mainly used in steel structure: used as a frame beam for steel frame columns in the frame structure subject to dynamic load; for example: equipment platform.
Narrow flange HN (Narrow): that is, the flange width of H-beam is much smaller than the height of H-beam.HN is the ratio of the height and flange width of H-beam is greater than or equal to 2; it is mainly used for beams.
I-beam, as the name suggests, is a kind of “I”-shaped cross-section steel, the upper and lower flanges of the inner surface of the inclination, generally 1:6, so that the flanges outside the thin and inside the thick.
Thin outside and thick inside, thus resulting in I-beam in the two main planes of the cross-section characteristics of the huge difference in the application of the strength characteristics of the difficult to play just now. Although
Although thickened I-beams have appeared in the market, the structure of I-beams has determined its torsional performance short board.
