Study on the Drainage Performance Evaluation and the Design Method of Horizontal Drainage Pipe Systems for SI (Support & Infill) Housing : Part 3-the Evaluation of the Drainage Performance and the Examination of the Drainage Load in Actual dwelling units

Abstract

The study is aimed at the performance evaluation and design method of the horizontal fixture drain branch pipe system, which is designed particularly for SI housing. The first paper focused on the performance evaluation of the drainage system by setting up a pipe model, on which tests were carried out with a set of specific criteria. The second paper clarified the relationship between the pipe length and the declining characteristic of the average flow rate of a typical sanitary fixture (qd-value) in conjunction with the consideration of the drainage load design. On the basis of the clarification, a calculation technique to estimate the load to a drainage stack and the influence of such a load were also discussed in the second paper. Considering the knowledge acquired from the abovementioned studies and deliberations, this paper looks into the evaluation of the performance of the horizontal fixture drain branch pipe system as well as the influence of the drainage load through drainage performance tests implemented on three actual dwelling units selected from an SI housing, which is located in Seto City, Aichitests implemented on three actual dwelling units selected from an SI housing, which is located in Seto City, Aichi Prefecture, Japan.