Lightweight steel structure (LSF) is one of the modern construction systems used to implement buildings with limited floors, usually up to 5 floors, which was first invented in 1950 in Canada and widely used since 1990 in industrialized countries of the world, including England, Canada, Japan and Germany. The main element in light steel structures are thin wall steel sections (LGS), which are formed using thin steel sheets and the Roll Forming method. In this structure, the vertical element is responsible for bearing vertical and lateral loads, and the horizontal elements in this structure are called runners.