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What is I-beam and what is the use of I-beam?

I-beam is also called steel beam and is a long strip of steel with a cross-section of I-shaped. I-beam is divided into ordinary I-beam and light I-beam. It is a section steel with a cross-sectional shape of I-shaped. Today, what is the use of I-beam, what is the use of I-beam? Let's learn together.

The meaning of the I-shaped shape we all know, the two beams of the same area, the most round, one is rectangular, and the rectangle is more stressed than the circle. This is because the stress is greatest at the upper and lower edges of the beam, and the closer to the neutral axis, the lower the stress. The circular cross section has a smaller area at the upper and lower edges farther from the neutral axis, and a larger area near the neutral axis, so that a large part of the material does not fully function, which is compared in the rectangular cross section. Better. Therefore, the rectangle is more economical than the circular one. Based on this principle, in order to make the best use of the material, the material near the neutral axis is often moved as far as possible from the neutral axis. The section of the steel such as I-beam is based on this principle. The strength of the I-beam is about twice as strong as that of a rectangular section with the same height and cross-sectional area. Therefore, in some factory buildings and bridge projects, I-beam mining is often used. In railway bridges, thick steel plates are also commonly used to rive into large I-beams. It is precisely for this reason that the rails of the line are made in an I-shape.

Use and specifications of I-beam

I-beam is used in construction and vehicle manufacturing. The metal column and beam/roof structure in construction engineering are mostly made of A3F low carbon steel, and also made of A5, 16Mn, 15MnV steel. Specifications are high x side width x thickness. For example, A3F100x68 .x4.5 mm.

The number of I-beams is determined by its twist (in centimeters). For example, the above example A3F100X 68 X 4.5 mm I-beam is the No. 10 I-beam. However, if there are two or three types of I-beams of the same width and thickness, the words "a" b "c" should be added to the lower right corner of the number to indicate the difference, for example, 200 x 100 x 7.0 mm. Steel and 200x102x9.0 mm steel, the number of which is *20a, #20b.

What is the use of I-beam for what is I- beam ? As far as this is concerned, the I-shaped steel is of a common type or a light type. Since the cross-sectional dimensions are relatively high and narrow, the moment of inertia of the two main axes of the section differs greatly, so it can only be used directly on the web. A member that is bent in a plane or is formed into a lattice-type force member. It is not suitable for the axial compression member or the member that is curved perpendicular to the plane of the web, which makes it have a large limitation in the application range. I-beams are widely used in construction or other metal structures.