Abstract
One of the methods of connecting steel members is a screw. Since screws do not use nuts, it can work from one side. By the way, there is a screw called a thread forming screw. It is a screw itself fabricates an internal thread to steel members, and it connects members. No research on strength of joints connected with thread forming screws in the field of steel structures of civil engineering has been reported, as far as an author gets to know. In this paper, the static tensile strength of the tensile joints connected with the thread forming screw is first investigated. Next, the static tensile strength and fatigue strength of lap joints connected with the thread forming screw are investigated. Finally, fatigue strength of joints in case a thread forming screw does not penetrate steel members is investigated.
