The problem of the edge effects of a three-layer rectangular plate with isotropic components is considered. The components of the composite are modeled by linear-elastic isotropic bodies. The mathematical model is represented by the equations of the linear theory of elasticity. The initial equations are reduced to the inhomogeneous ones, and the problem is formulated in the exact statement. The approximate solutions are found by the grid method. In addition, the discrete problems are build using the conception of a base scheme. The grid equations are written in an explicit form, and the optimization of evaluations is used in solving the mentioned equation. An example of the analysis of the zones of edge effects is given.

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