Year1
- 规格：
- 规格齐全
- 长度：
- 6m 9m 12m
I-beam, also known as steel beam (English name), is a long steel material with an I-shaped cross-section. I-beams are divided into ordinary I-beams and light I-beams. It is a section steel with an I-shaped cross-section.
Ordinary steel
Basic differences
I-beams are mainly divided into three types: ordinary I-beams, light I-beams, and low-alloy light I-beams.
The flanges of ordinary I-beams and light-weight I-beams have variable cross-sections. I-beam has formed a national standard, and ordinary I-beam is equivalent to the international standard (for example, channel steel is equivalent to channel steel) (because the standards implemented by different countries are different, their specifications are slightly different)
H type I-beam is also called wide-flange I-beam. H is derived from the European standard, and HB is the German standard I-beam. Among them, H and H I-beams have been widely used and produced in my country. H can be seen on many German designs, but is still difficult to purchase in the domestic market. In domestic steel structure projects, if the quantity is small, steel plates of equal specifications can be welded and spliced together. If the quantity is large, it is usually considered to use H and H-shaped steel with equivalent mechanical properties instead.
H-shaped steel is mainly used for steel core columns in reinforced concrete frame structure columns, also known as stiff steel columns. It is mainly used for columns in steel structures
The ratio of H-shaped steel height and flange width is roughly. ~~. Mainly used as steel frame columns in steel structures and as frame beams in frame structures that bear dynamic loads, such as: equipment platforms
The ratio of H-shaped steel height to flange width is greater than or equal to mainly used for beams
The purpose of ordinary I-beam steel is equivalent to that of H-beam steel
◆ Whether I-beam steel is ordinary type or light-weight, due to the relatively high and narrow cross-section size, the moment of inertia of the two main axes of the cross-section is quite different. , so it can only be used directly for members subjected to bending in the plane of their webs or formed into lattice-type stressed members. It is not suitable to use axial compression members or members that are perpendicular to the web plane and are curved, which greatly limits its application range.
◆H-shaped steel is an efficient and economical section profile (others include cold-formed thin-walled steel, profiled steel plates, etc.). Due to their reasonable cross-sectional shape, they can make the steel more efficient and improve its load-bearing capacity. Different from the ordinary I-shaped steel, the flange of the H-shaped steel is widened, and the inner and outer surfaces are usually parallel, which makes it easy to connect with other components with high-strength bolts. Its size series is reasonable and the models are complete, which is convenient for design and selection.
Scope of application
Ordinary I-beams and light-weight I-beams have relatively high and narrow cross-sectional dimensions, so the moment of inertia of the two main sleeves of the cross-section is quite different, which makes it difficult to There are great limitations in the scope of application. The use of I-beams should be selected according to the requirements of the design drawings.
Dimension design
H-shaped steel is an efficient and economical section steel (others include cold-formed thin-walled steel, profiled steel plates, etc.). Due to their reasonable cross-sectional shape, they can make the steel perform better and improve Ability to undertake decisions. Different from ordinary I-beams, the flanges of H-beams are widened, and the inner and outer surfaces are usually parallel, which makes it easier to connect to other components with high-strength bolts. Its size and composition are reasonable and its models are complete, making it easy to design and select.
When selecting I-beams in structural design, reasonable I-beams should be selected based on their mechanical properties, chemical properties, weldability, structural dimensions, etc.
Welding process
The flanges of H-shaped steel are all of equal thickness, with either rolled sections or combined sections composed of welded plates. Ordinary I-beams are all rolled sections. Due to poor production technology, the inner edge of the flange has: slope. The rolling of H-shaped steel is different from that of ordinary I-beam steel, which only uses one set of horizontal rollers. Because its flange is wide and has no slope (or very small slope), it is necessary to add a set of vertical rollers for rolling at the same time. Therefore, , its rolling process and equipment are more complex than ordinary rolling mills. The maximum height of rolled H-shaped steel that can be produced in China is mm. If it exceeds the height, it can only be welded combined sections.
Narrow flange H-shaped steel is suitable for beams or compression-bending members, while wide-flange H-shaped steel and H-shaped steel piles are suitable for axial compression members or compression-bending members. Compared with H and H-beams, ordinary I-beams and light I-beams are not as good as H-beams under the same weight.
Mark record
Reasons for the flanges of ordinary I-beams and light I-beams The root gradually becomes thinner toward the edge and has a certain angle. The models of ordinary I-beams and light I-beams are represented by Arabic numerals in centimeters of waist height. The web, flange thickness and flange width are different in specifications. It is expressed in millimeters of waist height (h) leg width (b) and waist thickness (d). For example, ordinary I-beam means that the waist height is millimeters, the leg width is millimeters, and the waist thickness is millimeters. /Light industry, that is, a light I-beam with a waist height of mm, a leg width of mm, and a waist thickness of mm. The specifications of ordinary I-beams can also be expressed by model numbers, which represent the waist height in centimeters, such as general workers. If I-beams with the same waist height have several different leg widths and waist thicknesses, they need to be distinguished on the right side of the model number, such as general, b, etc. The specifications of hot-rolled ordinary I-beam are. The specifications of hot-rolled ordinary I-beams supplied by agreement between the supply and demand parties are as follows.
Contact information: Mr. Hu
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