抄録
The authors investigated the usage in the toilets of a primary school. The fundamental data for estimating the optimum numbers of the fixtures have cleared in this paper. The frequency and the periods of usage by the students were measured all toilets of the school. These data were recorded by the personal computers system. Then, the following results were obtained. 1) In the case of the boy students, the frequency of the urinal usage was 2 times in a day. But in the case of the girl students, the frequency of the WCs usage was 1.5times in a day. 2) The simultaneous usage of all fixtures was not presented.
