ASSET MULTIPLATE BRIDGE RESTRENGTHENING | KILRENNY

ANSTRUTHER - SCOTLAND

PROJECT OVERVIEW

Kilrenny Bridge carries the A917 over Kilrenny Burn in Anstruther. The reinforced concrete bridge was built in 1937 over the top of the original, narrower, masonry arch bridge. During a programme of council-wide bridge assessments and a 17-tonne weight restriction, the bridge was found to be weak.

The scheme involved building a lightweight asset MultiPlate arch under the existing bridge and infilling between the two structures with concrete. This meant that the 1937 concrete bridge could be left in place but would become structurally redundant. The abutment walls from the old masonry arch also had to remain in place (with minor adjustments), avoiding the need to divert Kilrenny Burn. The remainder of the external faces were to be clad in natural stone.

PROBLEM SOLVED

By Fife Council adopting the asset MultiPlate solution, this resulted in substantial cost savings due to the works being completed with only 3 nights of road closures, necessary for the resurfacing works to be carried out. Key benefits of the works include significantly less disruption to traffic and the local community.

ESG

Environmental aspects highlighted during an environmental survey have been considered by the inclusion of a mammal pass near the main culvert. This quick and efficient installation also had a positive impact on social value and connectivity due to the modular nature of asset MultiPlate. The road is now open to two-way traffic, and one footway is even wide enough to accommodate a potential cycleway extension in the near future.