Connections between a bracket flange and a main girder are fabricated by full penetration welds. Generally, the joints at the lower flange of the bracket are subjected to cyclic compressive stresses. It means that there is a possibility to change the welding method between the lower flange of the bracket and the main girder into partial joint penetration in terms of fatigue strength under compression. In this study, the fatigue strength of the base joints of the brackets was examined. The test results revealed that the joints have enough fatigue strength under the compressive stress even though partial joint penetration is applied there.
