Atsushi ICHIKAWA, Kenji KATO, Tohru KAWAHARADA
Akira USAMI, Kouji TANABE
A non-painted weatherproof steel was first used for a railway steel bridge in 1980. Since then, bridges of this type have been increasing. However, a problem has arised recently on some bridges which were erected near seacoasts. This report describes the results of investigation of these bridges.