The document presents a comparative study on the crack propagation in double-edged steel beams under different retrofitting conditions using finite element analysis. Various retrofitting techniques including fiber reinforced polymer plates, steel plates, and ribs are modeled and their effectiveness in improving load capacity and fatigue behavior is analyzed. The results show that retrofitting with ribs provides better performance under central loading conditions, steel plates perform better under two-point loading, and FRP plates have higher strength under three-point loading, both with and without an initial crack in the beam.