Structural engineers use nonlinear structural analysis software to analyze the performance of structures under extreme loads, such as corrosion, seismic events, progressive collapse, and blasts. This type of software can identify deformations, internal forces, stresses, and other factors to verify a structure's safety. Common applications include vulnerability assessments, seismic analysis, blast analysis, and corrosion analysis. Extreme Loading for Structures (ELS) is one such software that uses a powerful nonlinear solver to automatically analyze both elastic and inelastic structural behavior, offering detailed results efficiently.