The difference between I-beam HW HM Hn H-beam
HW HM HN H is the general name of H-beam, H-beam is welded; HW HM HN is hot-rolled
HW means that the height of the H-shaped steel and the width of the flange are basically equal; it is mainly used for the steel core column in the reinforced concrete frame structure column, also known as the stiff steel column; it is mainly used for the column in the steel structure
HM is the ratio of H-shaped steel height to flange width is roughly 1.33~~1.75, mainly in steel structures: used as steel frame columns and frame beams in frame structures bearing dynamic loads; for example: equipment platforms
HN is the ratio of the height of the H-shaped steel to the width of the flange is greater than or equal to 2; it is mainly used for beams;
The usage of I-beam is equivalent to that of HN-beam;
1. Whether the I-shaped steel is ordinary or light, because the cross-sectional size is relatively high and narrow, the moment of inertia of the two main sleeves on the cross-section is quite different. Therefore, it can generally only be used directly on its web Bending members in the plane or form them into lattice-type stressed members. It is not suitable for axial compression members or members that are perpendicular to the web plane and have bending members, which limits its application range.
2. H-beams belong to high-efficiency and economical cutting profiles (others include cold-formed thin-walled steel, profiled steel plates, etc.), because of the reasonable cross-sectional shape, they can make the steel more effective and improve the cutting capacity. Different from the ordinary I-shaped, 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 snails. Its size constitutes a reasonable series, and the models are complete, which is convenient for design and selection.
3. The flanges of the H-shaped steel are all of equal thickness, there are rolled sections, and there are also combined sections composed of three plates welded. The I-beams are all rolled sections. Due to poor production technology, the inner edge of the flange has a slope of 1:10. The rolling of H-shaped steel is different from ordinary I-shaped steel with only one set of horizontal rolls. Because its flange is wide and has no slope (or small slope), it is necessary to add a set of vertical rolls to roll at the same time. Therefore, , its rolling process and equipment are more complicated than ordinary rolling mills. The maximum height of rolled h-beam that can be produced in China is 800mm, which can only be welded combined section.
Post time: Sep-01-2023