Crane 399 Refurbishment

Client: Babcock Marine

Location: Devonport Dockyard, Plymouth

Project: Refurbishment of Crane 399

Service: Access 



Denholm Industrial Services (DIS) secured a contract in fierce competition to refurbish Crane 399 located at 5 Basin in the Devonport Royal Dockyard, Plymouth.


The Challenge

This crane, built 35 years ago, stands 185 feet high and can carry 70 tonnes at a 20 metre radius. It was originally bought as a ‘large vessel refurbishment crane’ to operate up and down 5 Basin along rail tracks.

It is the only fixed crane capable of servicing the larger ships within the naval base.


The Solution

An 18 week window was initially agreed to undertake the works, however, a survey identified substantial additional works beyond the anticipated scope. The timescale was lengthened further due to severe weather conditions, with high winds hindering works for approximately four weeks.

Denholm Industrial Services delivered: 

  • Scaffolding
  • Containment
  • Surface preparation of the steel structure
  • Painting of the crane jib and bogies
  • Mechanical repairs by Relay

The scaffold required for this structure was highly technical.  To ensure the crane was equally counterbalanced at all times, the scaffold was required to be built in a strict sequence as fully detailed in the design drawings.