The summary describes a rehabilitation work for practical use on the building 2 (formerly library) in Waseda University. The examination identified the importance of the building 2 for the university, the process of construction, the preceding rehabilitation work, etc. The rehabilitation of shikkui ceilings and the seismic reinforcement were conducted, preserving its cultural value. “T. T-WALL”, the wall for reinforcement, looking like the bookstack, was developed this time, reflecting an ideology by Tachu Naito, who designed the building 2 structurally. It may be one of the first attempts for rehabilitation work to inherit an ideology of a structural designer.
