Too comprehensive! I-beam symbol, do you understand?

The use of I-beams in everyday life can be described in extremely broad terms. However, many people see the I-beam symbols in the design drawings but do not understand the meaning they refer to. The following are the meanings of various types of I-beam symbols that Xiao Bian has arranged for everyone. If you are still lacking in this area, you may wish to follow Xiao Bian to learn more about it!

First, what is I-beam

Before understanding the H-beam symbol, we first have a general understanding of the concept and type of I-beam. As the name suggests, I-beams are steels with a cross-section of "gong" shape, also known as steel beams. I-beams mainly include three types, specifically H-shaped steel, light I-beam and ordinary I-beam. It is widely used in various types of building structures, automobiles, machinery and appliances.

Second, I-beam symbol introduction

In general, the models of ordinary I-beams and light I-beams are expressed using Arabic numerals. For example, the general worker 160*88*6 indicates that the ordinary I-beam has a waist height of 160 mm and a leg width of 88 mm. The waist thickness is 6mm; the same applies to light I-beams. In addition, the specification of I-beam can also be expressed by the model number, for example, the general worker 160*88*6 can also be expressed as 16#. If the waist height is the same and the leg width and waist thickness are different, you can add a, b, c, etc. before the model number to distinguish them, for example, the common workers 16#a, 16#b, and 16#c.

H steel mainly includes welded H-shaped steel and hot-rolled H-shaped steel, while hot-rolled H-shaped steel is divided into HW (wide flange H-beam), HM (middle flange H-beam), HN (narrow flange H-beam) three types . Here w refers to wide, m refers to middle, n refers to narrow. HW, HM, and HN come from European standards, of which I use more I, HW, HN type I-beams. The HEB refers to the I-beam of the German standard. The HEA, HEB, and HEM types are used more often in Germany, and the domestic market is more difficult to see.

The national standard of hot-rolled H-beam steel in China mainly includes HZ (narrow flange), HH (wide flange), and HU (steel pile). H-shaped steel specifications are mainly represented by H×B×Tw×Tf, in which H refers to the cross section. Height, B refers to section width, Tw refers to web thickness, and Tf refers to flange thickness.

Because of the relatively high and narrow cross-sectional dimensions of the I-beams, whether they are common or lightweight, the moments of inertia of the two main sleeves of the cross section are quite different. Therefore, they can only be used directly in the plane of their webs. The bent member or the lattice member is a force member. It is not suitable to use axially compressed components or members that are bent perpendicular to the plane of the web, which limits its application.

The above is a brief introduction for Xiaobian. If you want to know more related information, please continue to pay attention to Qijia Consulting. More exciting consultation, please stay tuned.

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