ideYAPI BIM Knowledgebase Structural Engineering Earthquake Code Application Examples Example of a Steel Moment-Transferring Frame General Building Informations Current: Material Material SymbolsFy = Structural steel characteristic yield stressFu = Structural steel characteristic tensile stresst = ThicknessS355 is chosen for steel columns and S275 is chosen for steel beams.Material arrangements with ideCAD Structural are shown in the image below. ×