In order to investigate the effects of bolt-hole arrangement and edge distance of bolted joints on the ultimate tensile strength and failure modes of H-shaped tension members, we conducted tension tests of the H-shaped members jointed with high-strength bolts. We proposed formulas to predict the ultimate tensile strength of flanges and webs for net section fracture, tearing fracture and end fracture. The experimental results confirmed that the ultimate strength of the H-shaped member was obtained by the sum of both strength of flange and web. The ultimate strength of the prediction formulas, which were previously obtained from the steel plate joint tests, to the H-shaped members was discussed. SS400 steel, 590Mpa-grade and 780Mpa-grade high-quality steels were used for test specimens.
