- 學苑 = GAKUEN (ISSN:13480103)
- vol.873, pp.32-42, 2013-07-01
During the First Sino-Japanese War in 1894 it became necessary to construct a Provisional Makeshift Imperial Diet Building in Hiroshima. The building was completed that year in only 20 days, with the Diet assembling there the day after it was finished. It was demolished in 1898. The person in charge of the design and construction was Yorinaka Tsumaki(1859-1916). In this paper the author focuses on the method adopted in constructing the roof truss of its assembly hall, which had the largest roof, and analyzes various extant materials such as Tsumaki's transcribed lecture on how it was built, its plans, and diagrams from historical documents. Based on this research, the author has attempted to restore the truss. The roof truss of the building was not simply based on the standard roof truss technique though the techniques of queen post truss and German roof frame were applied. The time this building was built was a transition period when Japanese carpenters were not familiar with western roof truss technique, and Tsumaki needed to employ methods with which local carpenters would be comfortable. The author concludes that this roof truss is an interesting instance of the gradual diffusion of Western building techniques into Japan.