Showa Bridge, Road bridge in Sakaki, Japan
Showa Bridge is a road bridge crossing the Chikuma River that carries traffic between the banks using reinforced concrete and steel construction methods. The structure was designed to withstand strong river currents and seasonal flooding.
The bridge was completed in 1937 and replaced an earlier wooden structure from 1928 at the same location. The new construction applied modern reinforced concrete technology that was relatively new at that time.
The Japan Society of Civil Engineers designated the Showa Bridge as a civil engineering heritage site for its structural design and historical value.
The roadway is narrow and requires slower vehicle speeds due to limited space on the bridge. During rainy seasons the river can rise quickly, so it is wise to check weather conditions before crossing.
The structure combines reinforced concrete rose girder design with beam construction, featuring a narrow roadway width of 4.50 meters.
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