MORRIS Martin Chiba University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (20282444)
GOTO Osamu Kogakuin University, Faculty of Engineering, Professor, 工学部, 教授 (50317343)
ONO Satoshi Yokohama National University, Graduate School of Engineering, Associate Professor, 大学院・工学研究院, 助教授 (20311665)
HORIE Toru Nihon University, College of Bioresource Sciences, Associate Professor, 生物資源科学部, 助教授 (70256832)
|Budget Amount *help
¥12,700,000 (Direct Cost: ¥12,700,000)
Fiscal Year 2004: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2003: ¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2002: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2001: ¥4,400,000 (Direct Cost: ¥4,400,000)
This study concerns tenoned lintels, beams and floor-beams, set into a building's frame with similar joints, but hitherto classified separately. We defined them all as sashimono and their jointing as sashitsuke, examined their use in minka, castles, temple outbuildings, elite reception buildings, kuri and temples back to medieval times, made a database recording 98 buildings and their sashimono and created 3-D drawings of their structural frames as the basis of our research.
Minamoto, in temples, hojo, and minka with ridge-supporting posts, identified 3 frame arrangements incorporating sashimono (a bay-enclosing type, aisle-incorporating type and partition-stabilising type), the development of which he discussed. In temple outbuildings, Morris traced aisle-incorporation back to the 14^<th> century and sashimono used to omit core posts. He argued that the bay-enclosing type, found in kuri from the Momoyama period, developed from frame enlargement transforming penetrating ties into sashim
ono. Goto focused on castle donjons, and noted multiple sashimono use in floors, aisle-incorporating beams tenoned at one end, later supporting outer posts of upper floors, and beams tenoned at both ends between core posts, illustrating the development of multi-storey construction within a century. Horie examined 3 types of frame arrangements in minka, noted the regional character of lintel-level sashimono and the variety of structural planes incorporating sashimono, with "tengu" tenons and "koki" posts etc. Comparing the development of Gassho-style minka and minka in Tsukui, Ono noted the emergence of 2-tier beams and the shift of sashimono from the base of the roof truss to lintel level, furthering understanding of regional character.
Different types of sashimono use emerged and interacted in complex development patterns, influenced by status, development of upper floors, production systems, etc. Sashimono, we show, deserve a significant place in discussions of traditional timber framing and investigation of traditional architecture. Less