====== R Command ====== R,,,,,,, defines the real property set number with axial area , shear area for local axis 2 , shear area for local axis 3 , torsional inertia moment , flexural inertia moment for local axis 2 , and flexural inertia moment for local axis 3 . {{ R_Fig.png |Shear areas for different beam section types }} The section properties of some mostly used cross-sections are given above. If shear deformations are not going to be included in the analysis, let and be zero.