The authors have studied on the structural behavior of steel column-to-column joints with partial penetration groove weld. This paper discussed the design method for the partial penetration groove welded joints, and then proposed the design method specifically for throat thickness of the joints. In order to ensure the possibility of appl icat ion of the joints, the prel iminary design was done for an eight-story bui lding using the results of axial, moment, and shear forces obtained by seismic response analysis.
