Resumen
The concrete plate with external sheet reinforcing is considered. To the given plate preconditions of the theory of «thin plates» are applied. The order of a conclusion and factors of a matrix of rigidity for a rectangular final element of a considered steel-concrete plate is resulted. In each unit is present on three degrees of freedom. The polynom of 4-th degree with two variables for approximation of movings of points of a plate in a medial surface is accepted.