This study proposes the application of built-up beams to earth retaining wales. The built-up beam is made by stacking and joining two H-sections with high-strength bolts. Unification the joints of built-up beams is important to exhibit bending strength and bending rigidity sufficiently. However, research on such members has little knowledge at present in the field of steel structures and earth retaining wales. Therefore, the authors focused on friction joints with high-strength bolts on built-up beams. Tension tests of friction joints, bending tests of built-up beams with reduced and full-scale specimens were performed to verify the structural performance of the beams.
