Also known as the I-beam girder beam, the cross-section shape of the word strip steel. I-beam sub-ordinary beam and light beam 20 # I-beam, H-beam three. Is a cross-sectional shape of the trough-shaped ordinary steel I-beam, light beam flange is variable section by a thick web portion, the outer thin; H-beam:. HW HM HN HEA HEB HEM is and so on and so on beam flanges section. Ordinary beam, light beam has been formed with national standards, the equivalent of ordinary 10 # I-beam I100 internationally (such as 10 # channel also corresponds to channel U100) (because the standards of different countries, resulting in their Specifications are subtle differences) moment of inertia I-shaped cross-sectional moment of inertia of a composite of webs and flanges from the moment of inertia, in the direction of the spindle xx: xx is the moment of inertia of the web that is its own moment of inertia 8 # Workers Word steel, as long as simple adding the composite wings flap on xx moment of inertia, to its own moment of inertia coupled with the cross-sectional area of ??the flange shaft xx take this cross-section centroid distance squared (ie it is' shift '); spindle yy direction: web, flange itself that is the moment of inertia of the spindle yy beam moment of inertia on the 10th, that is, add simple rectangular cross-section formula bh3 / 12 operation and shift seen the web is cut facing the direction of the moment of inertia xx axis small sacrifice, when punch after missing part of the cross-sectional moment of inertia xx axis direction is lost very little;. moment of inertia yy loss of direction is not large beam 20a | Hefei Industry Word steel | Fair Trading by Bo Bo Trading Company Hefei exhibition. Hefei Show Bo Trading Company (www.hfzhanbo.com) strong, credible, in Hefei steel industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement will lead the development of innovative ideas of Commerce Bo into the brilliant and you work for a better future!