In order to improve the fatigue strength of welded joints, the weld toes with high stress concentration are generally finished by grinding. For the purpose of examining the influence of grinding methods on the fatigue strength of web-gusset welded joints, fatigue tests on web-gusset fillet welded specimens were performed. However, the influence was not examined sufficiently because the weld roots were sometimes fatigue crack origins in finished specimens. In this study, web-gusset specimens were fabricated by full penetrated welding in order to prevent the root-failure. Fatigue tests and stress analyses on the specimens have been carried out.
