A technically complex scaffolding solution has been deployed over Castle Bridge in Warwick to enable essential heritage repairs—while keeping one of the town’s busiest transport routes fully operational.
Castle Bridge, a Grade II* listed structure completed in 1793, spans the River Avon and carries the A425 Banbury Road just a short distance from Warwick Castle. As a vital artery for both vehicles and pedestrians, the bridge is currently undergoing an 18-month conservation programme aimed at restoring its historic stonework.
Faced with tight restrictions due to the bridge’s listed status and constant traffic flow, specialist contractor Sky Scaffolding Midlands Ltd was brought in to develop a bespoke access solution. The result: a remarkable cantilever drop lift scaffold designed to span the river without impeding access above or disturbing the waterway below.
Innovation in Action
The project’s standout feature is a 20-metre-long suspended scaffold platform over the arch of the bridge, supported by high-load aluminium beams cantilevered 8 metres from each bank.
With just 1.8 metres of usable space on the footpath for the scaffold base—and no encroachment allowed onto the road—counterbalance became a key challenge.
To solve this, Sky deployed 20 tonnes of specially purchased flat steel ballast, chosen for its high density. This approach allowed maximum counterweight performance within minimal space. The ballast was positioned with precision to achieve structural stability by maximising the lever arm of the cantilever—demonstrating the level of innovation required to work within tight spatial constraints.
The scaffold itself was constructed using the world-renowned Layher Allround system, which provided the flexibility, load capacity, and efficiency required for such a complex structure. The system’s modularity enabled a custom configuration tailored to the bridge’s historic form.
Crucially, the scaffold’s engineering and safety design was carried out by SDC Scaffold Design Consultants Ltd, who worked closely with Sky to deliver a scheme that met both structural demands and heritage preservation requirements.
Partnership and Public Safety
Throughout the project, Sky Scaffolding Midlands Ltd collaborated with local authorities, conservation experts, the principal contractor, and stonemasons to maintain the bridge’s integrity and public access.
Pedestrian safety was a top priority, with segregated walkways, protective barriers, and clearly marked signage in place. Night-time road closures were used for scaffold installation and maintenance to avoid daytime traffic disruption.
“This was one of the most technically demanding scaffolds we’ve delivered,” said a spokesperson from Sky Scaffolding Midlands Ltd. “The combination of the Layher Allround system and the expertise of SDC Scaffold Design Consultants Ltd made it possible to deliver a solution that balances heritage protection with public convenience.”
The restoration works are expected to conclude in Spring 2025. By maintaining full use of the bridge while supporting intricate repair work, the project has already been hailed as a model of engineering excellence and cross-disciplinary collaboration.
