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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.