Hi, In PLAXIS v8.2, 2D modelling of a shallow foundation, I have used plate element to simulate the horizontal base of foundation. What the problem I have been facing is, thickness of plate element is automatically calculated by the PLAXIS itself based on the input values of Normal Stiffness (EA) and Flexural Rigidity (EI). Then while calculating moment of inertia (I) what shall be the thickness of plate element ?