How do you mark the types of steel such as channel, I-beam and so on in the document?
According to the section shape, the section steel is divided into simple section steel and complex section steel (deformed steel). The former refers to the steel, round steel, flat steel, angle steel, six angle steel; the latter refers to the I-beam, channel steel, steel, steel, steel frame bending etc.
Section steel is a strip steel with definite section shape and size. It is one of the four big kinds of steel (plate, tube, mould, wire).
In the document mark "channel", "I-beam" and other steel symbols, the input method of small keyboard, right-click the Greek character mother.
