In this project, MSD was engaged to perform structural strengthening and retrofitting of pool and sauna building in Khomeini Shahr gym. Construction Defects were the main cause of damages in the existing foundation and steel structure. After initial consideration and identifying deficiencies in structure under investigation, strengthening of foundation (add new concrete strip footing next to existing strip footing) and correction of beam to column and bracing connection were proposed and retrofit detailing was presented.