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I beam has different sizes and very versatile, which is widely used for building construction, bridge, vehicle, bearing bracket, machine etc. 30# I beam with thick flange is specialized in electric hoist crane which is easy for electric hoist crane to operate.
The I-beam is mainly divided into three types: ordinary I-beam, light I-beam and low alloy light i-beam.
Ordinary I-beam, light steel flange is a variable cross-section of the thick web, the external thin; H steel: HW HM HN HEA HEB HEM, etc. the flange is a constant cross-section
Because of the relatively high and narrow section size, the ordinary steel beam and the light steel beam have a large difference in the moment of inertia of the two main sleeves. The use of I-beam should be selected according to the requirements of the design drawings.