Abstract
Many research works were carried out for the estimation of the number of fixtures. However, the method on t:he layout of the sanitary fixtures have not been clear theoretically. The results of the investigations for 6 buildings have shown that the frequency of usage of the sanitary fixtures were changed by the types of the layout. The results are shown as follows ; 1. There are many cases that the water closet and urinals are installed in the depth direction from the entrance. And the fixtures being near the entrance are generally used more than the others. 2. There are few difference of the frequency of usage for the fixtures being same distance from the entrance. 3. The case of the wash basin are installed in the same plane with the water closet and urinals, the wash basin being near those fixtures are used more than the others. 4. The case of the wash basin are installed in the rectangular or counter position of the water closet and urinals, there are a few difference of the frequency of usage, and the fixtures being near the exit are used some more than the others. Finally the authors discussed that those results infulenced for not only the layout of the fixtures but also planning of piping and maintenance.
