HAN ZOMON SU BWAY TU N N E L TOK YO, JAPAN QU E STION S: 1-8 00-267-828 0 or www.kr y ton.com Page 1 of 1 P ROJ EC T CASESTU DY PRODUCT Kr ystol™ T1 & T2 LOCATION Tokyo, Japan OWN E R Teito R apid Transit Authority (TRTA) BAC KG ROU N D In 19 85 the 10.8 km stretch of Hanzomon Subway was constructed several meters below grade. During initial construction a 1” (2.5 cm) rubberized sheet membrane was installed as specified by engineers to prov

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