The cast iron deck module is a lightweight deck slab with excellent fatigue resistance. High-strength bolt friction joints are used to join cast iron deck modules and main steel girders. In addition, the high strength bolt friction joints between the cast iron deck module and the main steel girder have to be considered because the ribs of the cast iron deck module have a taper of 1°. In this study, we prepared an experimental specimen of a composite structure of a cast iron deck and a main steel girder, and conducted a horizontal loading test and FEM analysis. As a result, the sliding behavior between the cast iron deck and the main girder was clarified.
