Scraesdon Fort is a Palmerston Fort near the village of Antony in Cornwall. Constructed in the 1860s the building is a Grade II listed scheduled ancient monument and is still used for military training operations.
The access bridge, spanning 20m, and the doors provide the only viable means of entry. We undertook a structural condition survey to assess the extent of their deterioration and worked in conjunction with Landmarc and English Heritage to agree a sympathetic and practical restoration.
The bridge and doors were dismantled, cleaned, repaired and painted prior to replacement. We designed replacement steel bridge components by using a new reinforced concrete deck, and we designed a replica timber drawbridge structure to match the original construction. The doors were also dismantled, repaired and fitted with bespoke machined stainless steel hinges embedded into the masonry walls.
We minimised both the use of materials on this project and waste generation by reusing many of the original components. We also improved durability through the specification of a high quality paint system, as well as through the new reinforced concrete deck and improved surface water drainage measures.
Safeguarding the fort’s railway bridge
In addition, we undertook a level two descriptive record of the historic rail bridge over the Tregantle military railway line at Scraesdon Fort in accordance with English Heritage standards.
We proposed measures to safeguard the bridge whilst maintaining road access over the railway. We excavated the railway cutting to inspect the bridge and ground conditions and from these assessments a pre-cast concrete over-bridge was chosen with a landscaped railway cutting to expose the original bridge.
This solution ensured the original bridge structure was maintained as a heritage asset whilst providing a modern bridge structure to carry the access road to Scraesdon Fort.