1997 年 62 巻 496 号 p. 113-118
To extend the life span of buildings is useful to reduce Life-cycle-CO_2. It is useful to cope with environmental disruption which is getting serious year by year. There are some reports on the investigation of life span of buildings components so far. In this paper, we surveyed the actual state of change and maintenance of building components, and tried to estimate the life span of building components applying probability of survival to theoretical distribution.