Non-linear analysis and design EC2 and EC3 Amses Frame2D is a structural engineering tool used to calculate internal forces, displacements and performs design of the elements. Many structures can be analyzed: planar frames, continuous beams, trusses, cantilevers, and so on. The design is an extra feature and is based on European building codes (Eurocode 2 - design of reinforced concrete structures and Eurocode 3 - design of steel structures).