Sismicad 13 is a structural calculation software with a 3D interface that provides for the definition of structures in reinforced concrete, masonry, steel, wood, seismic isolators and dissipators, self-supporting lattice beams (REP type), finite element modeling with an integrated solver and verification according to regulations with the production of executive drawings, technical reports, etc. For existing structures, it provides for verification of reinforcements with elements in steel, FRP, GFRP, CAM, etc. calculation of seismic risk indicators and seismic classification.