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  • Aerial view of a motorway bridge under construction over railway tracks, with active traffic and a construction site alongside green suburbs.

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  • Construction workers in orange hi-vis suits watch as two cranes lift a large bridge section at a railway construction site under an overcast sky.

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  • Aerial view of a bridge construction site beside a busy elevated motorway, with cranes, exposed steel supports, and railway tracks below.

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  • Aerial view of motorway bridge construction with a large green crane lifting beams over railway tracks, lit by floodlights at dusk.

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Keltbray Lifting Services, working alongside Keltbray Decommissioning, supported Costain with the planned removal of the Allerdeen Bridge superstructure. The works involved the controlled lifting and removal of 12 steel span beams, with individual lifts of up to 30 tonnes, requiring a carefully sequenced and risk‑managed approach.  

Keltbray provided end‑to‑end lifting support, including lift plans, crane studies and method statements, utilising two 450‑tonne mobile cranes operating from both abutments. Through disciplined planning and close coordination with the project team, the bridge 

Key Facts 

  • Two 450‑tonne mobile cranes 
  • Removal of 12 steel span beams 
  • Lifts of up to 30 tonnes 

Project scope:

  • Full lifting planning and execution for bridge dismantling works

  • Lift plans for removal of 12 steel beams

    (Up to ~30 tonnes) 

  • Coordination of dual crane operations

    (2 × 450 tonnes mobile cranes)

  • Sequencing to maintain structural stability during removal

  • Technical supervision and compliance with LOLER, PUWER, BS 7121

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