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Application characteristics of I-beam
Due to the relatively high and narrow cross-sectional dimensions of ordinary I-beams and light-weight I-beams, the moment of inertia of the two main sleeves of the cross-section is quite different, which greatly limits their application range. The use of I-beams should be selected according to the requirements of the design drawings.
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Advantages of I-beams
I-shaped beams are hollow web members. For high-strength materials, hollow web members are better than solid web members in terms of weight, material, and labor saving. This cross-sectional design mainly uses the flange farthest from the centroid to resist bending moments (because the farther the flange is, the greater the moment of inertia), and mainly uses the web to resist shear. As for the inconvenience in making it, it can be solved by factory or molding. Saving materials, labor, and time is efficiency.
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