A study on the static analysis of a naval panel made composite sandwich materials is presented. By using FEM, modeling floor with length 5 m and width 2.5 performed. Two distinct cases, have been performed: first model consists plate stiffeners steel second concerns material type / SANFoam103 steel, steel. parametric has The thickness faces 6 mm, for core SANFoam selected thicknesses 10 20 40 mm.