In this study, to improve prevention system against disasters for marine bridges, the related references of marine bridges were analysed. As a result, the guideline of prevention facilities against disasters for marine bridges was proposed. This study will be referred for establishing related standards.

This paper carried out a study on design for the deviation block of PSC box girder bridges with external tendons. As a result, the actual load distribution on deviation block must be considered for design because of a discordance with the design concept.