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Project Details

Client:
Hamilton Architects

Role:
Conservation Engineering
Service Life Modelling
Durability Analysis
Structural Survey
Non-Destructive Testing

Location:
Limavady

WW2 Trainer Dome, Limavady

The RAF Trainer Dome at Limavady, Co Londonderry is a single-storey reinforced concrete hemisphere framed structure on circular plan and was built in 1942 to the designs of Henry Christian Stephens. The framework of welded steel was fabricated off-site and used as a wire frame to support the poured concrete during construction and reinforce the shell. The finished walls are 112.5mm thick. The interior had a plastered finish and the exterior was cement rendered with a camouflage of tar spray coating over.

The Trainer Dome was in poor condition. Common issues related to the extensive corrosion of the reinforcement, failure of the concrete and the exposure and corrosion of metal lathing, particularly to the interior of the Dome. Externally, the bituminous waterproof coating has largely degraded and disappeared, leading to the exposure of the concrete surface and isolated corrosion of the reinforcement.

Amphora Consulting developed an Essential Conservation Works solution in accordance with policies COF2 and COF3 and using BS EN 1504 for the protection and repair of the concrete shell.

These proposals were carefully prepared through consultation with a range of stakeholders, statutory bodies and potential project partners.

The proposed works include three main strands:

  • Repair of existing internal dome structure.
  • Addition of new shotcrete internal dome with ring beam to add structural strength.
  • Repair of existing external defects, crack stitching and provision of new external waterproofing.

Project Details

Client:
Hamilton Architects

Role:
Conservation Engineering
Service Life Modelling
Durability Analysis
Structural Survey
Non-Destructive Testing

Location:
Limavady