Abstract
This paper presents the reasonable number of sanitary fixture in the office buildings. The contents are as follows; 1. Analyzing the results of questionnaire statistically, we considered a sense of time of users, the allowed waiting time and the usage of toilets. 2. Analyzing the investigation of the office buildings in Fukuoka City where sanitary fixtures had been restricted in usage for eight monthes in the Drought of 1978, we considered the opinions of users on the rash. 3. On the basis of the above considerations, we set up the three levels of the allowed waiting time and showed the reasonable number of sanitary fixture on the each level.
