The Columbia Steel Bailey Bridge is a military project undertaken by QHHK in 2018. It is mainly used for crawler vehicles and pedestrians. Since the weight of passing vehicles is relatively large, a three-row single-layer design is adopted to enhance the load-bearing capacity. The bridge is 13.5 meters long and 4.2 meters wide, and is overall silver.
In order to prevent corrosion and long-term protection of Bailey Bridge components, silver galvanizing is done. The bridge deck uses steel plates, and the beams use H-shaped steel and are reinforced with purlins.
The bridge has been put into use for 6 years. Apart from daily painting and anti-corrosion maintenance, there has been no structural damage.
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