Weld Weight and Area Spreadsheet Calculator Calculations for Double V Single V Compound V Backing Strip and J groove weld weight and area. For reference the moment of inertia of a. Bending Moment Calculation Bending Moment Shear Force Bending Moment Shear Force Civil Engineering Design Where M is the bending moment at the location of interest along the beams length I c is the centroidal moment of inertia of the beams cross section and y is the distance from the beams neutral axis to the point of interest along the. . C Distance from Neutral Axis and I moment of inertia. The bending moment M applied to a cross-section is related with its moment of inertia with the following equation. Use the equations and formulas below to calculate the max bending moment in beams. This calculation method is one I came up with. Shear stress due to the twisting or the torque. Beams of Uniform Cross Section Loaded Transversely.