The first step of the assignment was the description of the assigned supporting structure. An explanation of the connection reactions was required in order to assume the reactions in the supports of the given structure. Internal forces and sign convention for internal forces are explained. Prior to the static calculation, a brief overview of the finite elements method was given. Finite element calculation was performed in the software, FEMAP. An analysis of the calculated internal forces and strain was performed. The strenght criteria was determined. A brief explanation of strength theories was given. The optimum cross-sectional shape of the support was chosen based on the strength criteria. The final step in the task was to do the control of the stresses in the selected cross section, where it was determined that the selected cross section meets the strength criterion. Comparison with the stiffness criteria was made.