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[Case Study of Wooden Facility Renovation] Nanayama Truss Bridge

Appropriate renovation proposals are possible! Introducing cases where FRP materials have been used for the renovation of truss bridges.

We would like to introduce a renovation case of the "Nanayama Truss Bridge" (Karatsu City, Saga Prefecture), which was constructed using foreign timber along a walking course dotted with seven waterfalls and pools. The entire timber showed signs of decay, and we carried out reinforcement work considering both aesthetics and structural integrity. Boron-based insect and decay prevention agents (Impel Rod) were embedded in the decayed areas of the timber, and a protective wood coating was applied over the entire surface. Additionally, the main girder was reinforced with steel to enhance safety. 【Renovation Case】 ■ Renovation Details: Truss Bridge (Width: 2.5m × Length: 29.0m) ■ Materials Used - Structural Material: Bongo wood → Steel - Decking: Bongo wood → Repaired and reused - Handrail: Bongo wood → Repaired and reused Our company is capable of providing appropriate renovation proposals by combining various materials such as steel, aluminum alloys, FRP, recycled wood, and natural wood. For more details, please refer to our catalog or feel free to contact us.