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15

Sue Caples, Operations Manager and Head Engineer at Modulift said “The Gas Turbine had a 75/25 offset centre of

gravity which meant that we had to design a lifting rig that would enable the turbine to be lifted level despite the

extreme offset CoG. We achieved this by designing a ‘1 over 2’ Lifting Rig that had different length top slings so

that the crane hook would be directly over the centre of gravity during the lift. It is important for loads to be lifted

level particularly for installations such as this one, and it was a great success because the load was level within

0.2 degrees from horizontal. We are very pleased to have provided the lifting equipment for such a prestigious

project”

Manufacture of the spreader

beams was carried out to exacting

standards and procedures which

captured the need for all aspects

of the manufacturing process to

be controlled and compliant with

order requirements.

Prior to painting the spreader

beams, Modulift conducted Proof

Load Testing using its purpose built

Compression Test Rig. All of the

spreader beams were individually

assembled and loaded one at a

time into the compression test rig.

The designated proof load was

applied, (for this project the proof

load factor was SWL + 25%). Testing

of all of the spreader beams was

successfully completed without

any issues and a final post-test MPI

examination verified that there

were no weld defects after testing.

The drop links for the spreader

beams were then proof load tested

in Modulift’s own tensile test rig

using the same proof load factor as

the spreader beams.

Richard Charlton of Rolls-Royce

commented “All went to plan with

not a single problem. The Babcock

shipyard had lots of Modulift beams

on site and assembled and rigged

the beams very easily. Many thanks

for Modulift’s hard work.”

...Rolls Royce viewed the lifting of the gas turbine as a

“significant milestone

” in the Queen Elizabeth shipbuilding

programme.