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SFAT is a fatigue life analysis software for steel structures, components, as well as welded and bolted connections seen in buildings, bridges, cranes, offshore platforms, offshore wind structures, and other structures subjected to cyclic loading. SFAT is a design code compliance software. Fatigue involves complex phenomena and mechanism, and the design codes constantly change as researches, practices and experiences evolve. Using SFAT the user can minimize risk of failure from cyclic loading and ensure design code compliance by applying automated fatigue life analysis, making the complicated tasks easy. SFAT supports ANSI/AISC 360, ASME BTH-1, EN 1993-1-9, DNVGL-RP-C203, API-2A-WSD, and ISO 19902. The powerful non-proportional capability of SFAT solves multiaxial problems with critical plane method. SFAT directly supports ANSYS and indirectly supports other FEA packages, or loading spectrum can be manually entered without any FEA. SFAT is by far the most intuitive and easy-to-use fatigue life analysis software for structural engineers and stress analysts.