UK-headquartered heavy transport engineering specialist Allelys has offloaded, delivered and installed four transformers, weighing 255 tonnes, for the Dogger Bank wind farm.

Allelys lifting transformers dogger bank

The cargoes were received in two shipments at Albert Dock in Hull, where the team lifted the units using Allelys’ LG1550 crane onto a 10-axle SPMT and shunted them to a storage location for transhipment on to its 350-tonne capacity girder frame trailer. They were then transported before the next shipment arrived.

The transformers, measuring 9.5 m x 4.9 m x 4.9 m, were transported over four consecutive weekends to the Creyke Beck substation.

The transport arrangement, measuring 70 m long and weighing 397 tonnes, had to navigate a challenging route, which included three structures that required bridge inspections and AIP’s to be submitted. The significant road works and road layout changes at Jock’s Lodge also posed a challenge, however the team identified and established a new route in advance of the project start date.

Once onsite, the units were installed using a jacking and skidding system. The units were jacked up, the skid gear positioned underneath and then skidded into position in four separate bunds. Allelys used turntables to rotate three of the four transformers and a two directional skid for the final unit.

Allelys skidding transformers dogger bank

“We were involved at every stage of the project from completing letter drops, organising street furniture removal and temporary traffic management, through to project management and engineering support. To achieve four deliveries on consecutive weekends is a testament to the team’s hard work and ensured that the operation was completed on time,” said Zac Smout, senior project manager at Allelys.