Prof. Ashraf Osman is a professor of birdges and metallic structures at Faculty of Engineering, Cairo University. He studied the Ph.D at McMaster University at Hamilton, Ontario, canada. He studied for the M.Sc degree and B.Sc degree at cairo University, Cair, Egypt. He is expert in design of steel structures. His research works are in mainly in the fields of seismic design of steel structure, Structural restoration of historical buildings and seismic rehabilitation of enganged structures.