The Difference and Use of Crane I-Beam and H-beam
Whether I-shaped steel is ordinary or light, because the cross-sectional dimensions are relatively high and narrow, the moments of inertia of the two main sleeves of the cross-section are greatly different. Therefore, they can only be used directly on the web. Bending members in the plane or grouping them into lattice-type force members. It is not suitable to use axially-compressed components or components that are perpendicular to the web plane and also curved, which makes it very limited in application.
H-beams are high-efficient and economical cross-sections (others include cold-formed thin-walled sections, profiled steel plates, etc.). Due to the reasonable cross-sectional shape, they can make the steel perform better and improve cutting capacity. What is different from the ordinary I-shape is that the flange of the H-shaped steel is widened, and the inner and outer surfaces are usually parallel, so that it can be easily connected with high-strength bolts and other components. Its size constitutes a reasonable series and complete model, which is convenient for design and selection (except for I-beams for crane beams).
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