... ), is a beam with an I or H-shaped cross-section. The horizontal elements of the "I" ... beam. Beam theory shows that the I-shaped section is a very efficient form for carrying both ... the web. On the other hand, the cross-section has a reduced capacity in the transverse direction, ... BS, DIN, GB, JISMaterialSS400, Q 235B,S235JR,Q345B, S355JRBrandJINXI ,MA STEEL,LAI WU ,RI ZHAO,TANG STEELTechnique1.Hot rolled ...