The thesis on topic “ Calculation of a statically undeterminate beam by methods of forces and displacements” consists of four parts. In introduction, the notions of static and kinematic uncertainty and the very notions and division of girders are explained as well as description of the cross section and their sign. Method of forces and displacements are explained theoretically and with a simper example of assignment with with the solution procedure, after whic h is given their comparison. In the second part, the four times statically undeterminate beam is solved with the force method where diagrams of internal forces are presented. For the same beam, with different value of flexural rigidity by areas of the be am was solved and their internal diagrams are presented. Furthermore, this same beam, who is also four times kinematically undeterminate was solved with method of displacement where internal force diagrams coincide with the same diagrams from the force method. After the calculation in the third chapter, the statically indeterminate beam is dimensioned where distribution of normal and shear stresses were presented in arbitrary cross section. For the characteristic point P for the HE 100 B profile, the equivalent stress was calculated.