Allelys complete the 2nd of 3 packages for the world’s largest offshore wind farm


Equipment Used:

  • Mobile crane
  • Climbing jack
  • Mats
  • Stools
  • Modular trailer
  • Girder frame
  • SPMT
  • Tractor unit
  • Standard flat trailer
  • Van
  • Forklift


Services Provided:

  • Transportation
  • Installation
  • Route study
  • Lift plan
  • Lift management
  • Structure analysis
  • Ground analysis
  • Project management
  • Engineering
  • Consultation
  • Load spreading
  • Overbridging
  • Skidding
  • Jacking
  • Lifting
  • Swept path analysis

Four transformers weighing 255te each

Allelys has successfully completed the 2nd of 3 packages of work for the Dogger Bank B onshore converter station, part of the world’s largest offshore wind farm.

This scope of work was to receive four transformers, each weighing 255te and measuring 9.3m long, 4.2m wide and 4.8m high at Albert Dock in the Port of Hull, before transporting them to site and installing them in their final positions.

Seamless solution across 4 consecutive weekends

Initial pre-works and engineering studies had suggested that Albert Dock would be unsuitable to accommodate the offload of the transformer units and that the project may be at risk of a significant setback. However, Allelys’ experienced in-house engineering team developed a bespoke crane mat and load spreading solution, to enable the lifting operations to proceed whilst adding vital protection to the quayside.

In order to successfully offload the vessel, Allelys rigged the LG1550 mobile crane to safely load the transformers onto a 12 axle SPMT, which transported the loads across the docks to a suitable transshipment area. The transformers were transshipped to Allelys’ Faktor 5.5 girder frame trailer, with 350te capacity, ready for transportation to site.

The girder frame transportation took place over 4 consecutive weekends. Moving one transformer at a time before going back to reload the next. This carefully planned operation provided a seamless solution for our client to receive the transformers in the more efficient time frame.

Once each transformer arrived at site, each unit was installed using a combined approach of turntables, jacking and skidding systems, allowing Allelys to successfully turn, move and install the transformers in their designated bay.

“This project was a great project to work on and the slick operation of delivering four transformers, to four different bays over four consecutive weekends shows just how experienced Allelys are at delivering power generation projects. We’re able to efficiently engineer and deliver solutions that meet the requirements of each individual project, whilst also minimising disruption for our clients” commented Jordan Heath, Project Manager at Allelys.

Let's talk about what Allelys can do for your business

We would love to hear more about the challenges you are facing. This form below will help us understand that project better and one of our experienced members of the team will be pleased to help you.

We've been quite busy lately!

Complex delivery to Rothienorman

352te generator and 158te transformer delivered to Rothienorman Substation.

Slough Multifuel Expansion project

Providing transport solutions across several scopes of work.

First delivery to Eye complete

First delivery, of a 327.5te generator delivered to Progress Power Station.

Certified marks Certified members mark Certified marks