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Sheffield-based Geo Robson and Co and RJD Engineering designed the Riser Gantry Crane for TSC Offshore, which paid Robson GBP1m for the project.

The crane will be shipped to the offshore Olinda Star oil rig in Brazil.

It was pre-built at Hellaby, Rotherham, so the hydraulic and electrical systems could be tested and proved.

The large sections weigh up to 65 tonnes; the whole structure weighs 125 tonnes.

Four huge mobile cranes had to be used, weighing between 500 and 75 tonnes, with only a few feet between them.

The central bridge section was lifted 30m high so the side legs could be manoeuvred under it; the bridge was then lowered back on top.

A cherry picker was used to reach the high connections and enable the connecting bolts to be fixed.

RJD Engineering made all of the structural sections and provided all of the ancillary steelwork, utilising most of its 42,000ft2 workshop in the process.

Robson provided the mechanical systems for the crane, with all the electrical and hydraulic systems fitted in situ.

The crane was dismantled this week ready for its long journey to Brazil.

TSC has placed a follow-up order with RJD Engineering and Robson for additional offshore equipment and another Riser Gantry Crane, which will be built early in the new year.

Robson Handling Technology

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