Abstract
This paper is one of the completion for the consistent research including the released reports on the main and local meetings of A.I.J. This is the examination for the problems of using sanitary fixtures as the fundamentals for the sanitary equipment design, piping design and calculation of the volume of use water or the optimum numbers of fixtures. At first, it is suggested that there are some undeveloped parameters, and necessities to keep on inevestigation regularly and minutely. And then, it is suggested the analysis for the simultaneous use of sanitary fixtures. For that problem, conventional reports were all some of the investigatives or theoreticals, and there was no experimental method. This report is suggested the new experimental method, and the results of analyzing by this method. The results is saggested that the distribution of the numbers of simultaneous use approximates the poisson distribution (see Fig.4〜8), and the case of multi stories simultaneous use corrects error of the conventional value (see Fig.11〜15).