会议名称：“2021世界木材日”研讨会暨第三届国际林联（IUFRO） 林产品文化研究组讨论会
会议时间：2021年3月22日

报告嘉宾：Wataru Saeki
嘉宾简介：Engineer of Obayashi Cooperation，Japan

摘要：

Log architecture has been one prototype of traditional timber structures in many regions rich in forest resources. Although timber has been the main structural material in Japan, log architecture has never been common, and the major structural system is of post and beam construction. The authors have been operating on-site investigation on historical log architecture in Japan and East European countries for the past five years. Through the multiple onsite investigation it has been identified that there are similarities as well as many difference amongst these historical log architecture. The most prominent difference is in the shape of the log sections. The sectional shapes of the historical log architecture are round, square, or rectangular. But in Japan log architecture using triangular section (pentagonal or hexagonal section to be precise) logs are found. The logs used in these “triangular log architecture (Azekura in Japanese)” are stacked on top of each other with the ridge line facing outside and the flat surface to the inside constituting a distinct exterior wall. Many of these “triangular log architecture” are of cultural value. There are 43 “triangular log architecture” in Japan constructed before the mid 19th century, and out of these 37 are designated as cultural properties by the national or local government. The oldest date back to the 8th century, and many of these buildings are used as treasure houses to keep precious objects within temples or shrines.
The structural system of historical log architecture are introduced based on onsite investigations. The similarity and difference of historical log architecture are discussed based on multiple examples from Japan.

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