This article shows numerical investigations of ribbed plywood panels with top and bottom plywood flangesand a core of curved plywood ribs. It is possible to vary with stiffness in transverse direction of a plate by changing formof panel ribs. This property can be described as structure’s or material’s level of anisotropy or the other results aredescribable as specific strength or stiffness (to mass of whole construction). The numerical simulation of plywoodstructure is done by using classical linear Kirchoff Love theory of thin plates and Finite Element Method. The variousresults depending on chosen variables (according to strength-stiffness criteria) plywood composite macrostructure isobtained for one span panel. Results show that by increasing number of waves it is possible to decrease level ofanisotropy and by changing parameters of waves stiffness in transverse directions could be increased and these resultscan be used for creating ribbed panel design guidelines. It is proven that these parameters remain constant at differentpanel height. All FEM calculations were done by 3D ANSYS software.