For the long bolted joints with filler plates in rusted contact surfaces, the nut rotation angles of turn-of-nut tightening method for the design of the joint are not proposed because the axial force induced into the bolts under those conditions have not been clarified. In order to clarify the induced axial force of the bolts, bolttightening tests of joints were carried out. Considering the influence of bolt length on induced axial forces and its relaxation obtained in the bolt-tightening tests, the nut rotation angles according to different bolt length were proposed.
