Protective role of Angle steel
The thickness of the hot dip galvanized layer of high-quality Angle steel is generally more than three times the thickness required by this standard, and more than ten times the visible thickness. The high-quality hot Angle steel has a good covering ability, and the actual coating is dense and stable. Its composition does not contain inorganic substances and other impurities. When the Angle steel is seriously damaged or even endangers the iron matrix itself, the zinc layer of the Angle steel will inevitably produce corresponding electrochemical protection to the matrix. The atmospheric corrosion resistance of zinc layer to base metal iron is obviously better than that of galvanized layer, which fully reflects the excellent external protection ability of Angle steel.
At present, the steel on the fire steel is mainly I steel, Angle steel, channel steel and other steels, but how is the expansion length of the Angle steel calculated?
The development length of the Angle steel: the section of the Angle steel is asymmetric, so the position of the neutral layer is not in the center of the section, but is located at the center of gravity of the Angle steel root, that is, the neutral layer coincides with the center of gravity.
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