Spencer Bridge Engineering were approached by the Nobel Exhibition Trust to construct the first retractable bridge which was the longest of its kind at the time of commission. This project is recognised as “The Scottish Bridge of Invention” and is acknowledged as a highly innovative piece of engineering.
The 60m span ‘retracting’ bridge structure provided an essential opening for the navigation of 18m wide ships. At the time of construction, it was the longest of its kind in the world.
Spencer Bridge Engineering delivered a range of benefits for the client by providing innovative and alternative design solutions. For example, the project team proposed the construction of a retracting footbridge, rather than an opening bascule bridge as suggested by the client.
The alternative designs required a reduced level of marine piling and embankment works, together with reduced wind loading when in the open position, a major factor on the exposed marine estuary.
Spencer Bridge Engineering operatives utilised their self-propelled piling barge, the ‘Meeuw’ to drive tubular steel piles, 2000mm in diameter. The barge was also used to transport and install large, prefabricated sections of the bridge to the north bank of the estuary where there was no access for heavy lifting.
Spencer Bridge Engineering were highly commended by the client, the Nobel Exhibition Trust, for their alternative and innovative approach to works that reduced the risks associated with the project and anticipated maintenance costs early.
The bridge is now acknowledged as the “Scottish Bridge of Invention” and acts as an iconic structure to this day, providing key pedestrian access across the River Irvine.
