Most sewerage structures in urban areas in Japan are several decades old. Some of these structures need to be repaired immediately, without interrupting the daily use of the entire system.

CTI has a wide range of experience in defect evaluation and renewal design of sewerage structures. This is done by detecting the reasons for deterioration of the structures, and evaluation of the soundness of the materials and parts. With this data, our company implements the most suitable design while taking into consideration the surrounding environment, future maintenance and construction conditions.