【Paper】
Proposal for Hand Demolition of Wood Houses for Effective Use of Wood Materials
Hirofumi Miyazaki*, Kei Tanaka**, Masafumi Inoue**, Hirokazu Takanashi***, Makoto Hirata** and Tadashi Hano**
* Oita Prefectural Institute of Health and Environment
** Faculty of Engineering Oita University
*** Faculty of Engineering Kagoshima University
† Correspondence should be addressed to Hirofumi Miyazaki:
Oita Prefectural Institute of Health and Environment
（2-8 Takaenisi Oita-city, 870-1117 Japan）


Abstract
An efficient hand demolition system for wooden houses is proposed in this study for the effective recovery of wood materials.
The amounts of reusable wood building materials obtained from demolished wooden houses and the labor times for each demolition process were investigated. The amount of wood material（0.071m3）recovered per unit of floor area（m2）was also obtained in this research. Demolishing a wooden house required 0.98 working hours（laborer・hours）per unit of floor area（m2）. By reducing the amount of wasted wood, the hand demolition system is very efficient from the considerations of both environment and economy.


Key words: hand demolition, classified demolition, conventional wooden structure, wasted wood building materials, environmental efficiency