Why are I-beams and H-beams different?
I-beam
I-beams are mainly divided into ordinary I-beams, lightweight I-beams, and wide flange I-beams. According to the ratio of flange to web height, it is further divided into wide, medium, and narrow flange I-beams. The specifications produced by the first two are sizes 10-60, with corresponding heights ranging from 10 cm to 60 cm.
I-beam, as the name suggests, is a type of "I-shaped" cross-sectional steel with an inclination of 1:6 on the inner surface of the upper and lower flanges, making the flanges thin on the outside and thick on the inside. As a result, the cross-sectional characteristics of I-beam in the two main planes differ greatly, making it difficult to fully utilize the strength characteristics of the previous section in application.Although thickened I-beams have also appeared in the I-beam market, the structure of I-beams has determined their short torsional performance.
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H-shaped steel
H-shaped steel is an economical and efficient profile with a more optimized cross-sectional area distribution and a more reasonable strength to weight ratio. It is named after the same section as the English letter "H". The two outer and inner edges of H-shaped steel have no slope and are straight. This makes the welding and splicing of H-shaped steel easier to operate than I-shaped steel, with better mechanical properties per unit weight, which can save a lot of materials and construction time.
The I-beam section has good resistance to direct pressure and tension, but the section size cannot resist torsion due to the narrow wing plate. H steel, on the other hand, has its own advantages and disadvantages.
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Differences and usage instructions between H-beam and I-beam
1.The flanges of H-shaped steel are of equal thickness, with rolled sections and composite sections composed of three welded plates.I-beams are all rolled sections, and due to poor production technology, there is a 1:10 slope on the inner edge of the flange. The rolling of H-beam is different from ordinary I-beam, which only uses one set of horizontal rollers. Due to its wide flange and 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.
2.I-beams have small side lengths and high heights, and can only withstand unidirectional forces.The H-shaped steel groove is deep and thick, and can withstand forces in two directions.
3.The flange of I-beam is thicker at the belly plate and thinner on the outside; The flange of H-shaped steel is an equal wearing surface.
4.HN is the ratio of H-shaped steel height to flange width greater than or equal to 2; Mainly used for beams; The use of I-shaped steel is equivalent to that of HN shaped steel.
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GNEE Steel was founded in 2008 and has over 200 employees. We have cooperated with customers from all over the world and have also had exchanges and cooperation with foreign customers.
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