RFEM is a structural engineering program based on finite element method. You can calculate the deformations, internal forces, support reactions and stress in joints in case of planar and spatial slab, wall and shell structures, plane and space trusses and mixed structures. In addition, RFEM can also count on the body and the contact elements. One of the strengths of this software is user-friendly environment, which was one of the most important thing during the design phase of RFEM, but  the performance of computing and dimensioning algorithms is also advantage of RFEM.