Photograph source：「Concrete Bridges in Hokkaido Vol４」（Association for Civil Engineering Technology of Hokkaido Concrete Research Committee）
| Structure name | Osarugawa Bridge長流川橋 |
|---|---|
| Structure type | ①PC 4-span continuous rigid frame box girder bridge ②PC 3-span continuous rigid frame box girder bridge ③PC 3-span continuous rigid frame box girder bridge ④PC 4-span continuous rigid frame box girder bridge |
| Structural factors | Length of bridge 1,772.5m Span length ①4@35.0m+4@40.0m×5+4@35.0m ②3@35.0m×2 ③66.0+105.5+66.0m ④4@35.0m+3@35.0m |
| Client | East Nippon Expressway Company Limited. |
| Designer | Chiyoda Enginnering Consultants Co.,Ltd・Daiwasekkei Inc・IDEA Consuitants，Inc |
| Contractor | WEST-SECTION（①、②）：Joint-venture group P.S. Mitsubishi Construction Co.,Ltd・Fuji P.S. Corporation EAST-SECTION（③、④）：Joint-venture group DPS Bridge Works Co.,Ltd・Nippon High strength Concrete Co.,Ltd |
| Location | Date city |
| Route name | Hakodate-Nayoro line HOKKAIDO EXPRESSWAY |
| Completion date | 1994 |
| Overview | This bridge is a very long PC bridge belonging to part of the Hokkaido Longitudinal Expressway motorway, and located on the south side of Toya Lake and Usu Mountain. The bridge length of 1,772.5 meters makes this the longest PC highway bridge in Japan. Features of construction include the use of the large moving scaffolding method for spans A1 to P34 in the Osarukawa west construction area to reduce the construction period, whereas, for spans P34 to P37 in the East construction area, the overhanging erection method was used due to large space under the girder, and the fixed scaffolding method was applied for spans P37 to A2. |
