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The paper describes the methodology of designing geometric dimensions of elements of various structures h/L<0.01, where h means height and L length. It is useful for designing the optimum span of elements for which reaching the minimum value of f bend deflection is required. Creating an additional "artificial" stress acting axially in the direction perpendicular to the beam deflection reduces the value of the f bend deflection in a macro scale. The experiment has shown that the deflection of an element is minimised if the additionally applied force operating along the inert x axis is approximately 1 884 times greater than the forces causing the arrow to deflect in the y axis. The results confirmed that the introduction of an additional tensile force affecting an element in the system along the axis and the creation of an additional "artificial" tensile stress allows for reducing the bend deflection to 0. The developed methodology of designing geometrical elements h/L<0.01 consists in introducing additional forces causing stretching of the element along the x axis and checking the state of stresses in extreme fibres. If the fibres on both sides of the inert x axis are stretched, the deflection value on the macro scale is negligible.