Conservation

The restoration of the Union Chain Bridge (2020-2023) is now complete.

The repair and conservation works included:

• replacement of the chain anchorages with new rock anchors and anchor block;
• removal of the wire rope and associated hangers installed in 1902/3;
• the principal hangers will be replaced with mild steel replicas, maintaining the exact profile of the originals;
• the deck timber supports and angles will be replaced;
• the deck boards will be re-used or replaced as appropriate.  A narrower vehicle carriageway and wider footways will lower speed and stress on the structure while improving pedestrian access and safety;
• the existing handrails and railings will be conserved and moved in-board so that the hangers do not pass through it, thereby removing fatigue stresses. A new section of handrail will be installed in the central section to comply with safety requirements;
• the English-side deck flap will be replaced;
• a new four-coat paint system will be applied;
• the towers on both sides will be repointed with lime mortar and stones will be repaired or replaced as necessary;
• and the chains will be disassembled, using specialist winches on or near the masonry towers. The chains will then be repaired and painted off-site and reassembled back into their original position.