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Analysis Of Cross - Sectional Shape Of Flat Steel Bar For Steel Grating

Flat Steel Bar is an important part of steel grating, in the steel grating from the main bearing role. Details can be seen: the quality of the steel grating is closely related to the Flat Steel Bar, and now the steel plate of the Flat Steel Bar is mainly used thickness T = 3,5,8 mm rectangular cross-section steel and a particularly thin, both ends are relatively thick Type I cross section Flat Steel Bar.

The geometrical and mechanical properties of the I-type cross-section steel are much stronger than those of the rectangular section, and the bending resistance of the I-section Flat Steel Bar is the same as in the case where the Flat Steel Bar height H and the cross-sectional area F are the same: Wx = 0.2-0.203FH , And the rectangular section of the Flat Steel Bar bending coefficient: Wx = 0.167FH, so from the data we can see, I-type Flat Steel Bar bending capacity than rectangular Flat Steel Bar is much stronger.

However, due to the shape of the I-type section is rather special, more limited, so all the Flat Steel Bar can not be replaced with I-type Flat Steel Bar. The range of use of type I Flat Steel Bar now used is also limited by the fact that when the height H of the Flat Steel Bar is relatively small, the a value of the flat crosshead of type I cross section is too small to be suitable for hot rolling and is not conducive to embedding Type welding. When the height of the Flat Steel Bar H is relatively large, I-type cross-section of the flat waist thicker than h / t is too large, but also caused the lack of lateral stability of Flat Steel Bar. Therefore, the current steel grating manufacturing industry to use rectangular section of Flat Steel Bar.