The two most widely used products in the construction industry are angles and studs, which differ greatly in appearance and application in the industry. In the industry, steel profiles are L-shaped. Corner is one of the most important sections used in the building and construction industry which is widely used in steel frames and structures. According to the design presented by the engineers, the corners are used as branches and crushed. Corner joints are used for simple joints in structures. Types of joint joints are: die joint joint, seat joint joint, semi-joint joint, joint joint, etc.