The authors have been involved in the research project to develop members of built-up structures using high-strength steel of 780N/mm2 that are utilized in buildings which can withstand a severe earthquake (JMA seismic intensity of 7) and enables rapid functional recovery. We propose weld-free built-up structural members that have the cross section of two high-strength steel channels stitched together with bolts. Joints for high-strength members are required a lot of bolts by use of ordinary friction bolts. Joint length of the friction bolts is so longer as to avoid a practical structural design such as high rise buildings. Hence, the authors present a new fastener for high-strength steel members. A new fastener is half moon shaped bearing bolt. The fastener has high strength due to bearing bolts. And it has no slip phenomena, so high stiffness of fastener is promised. This paper shows the concept and capabilities of presented bolts.