Alfa Lift construction progresses

by Tom Russell in Vessels 21/01/2020 Offshore Heavy Transport

The construction of Offshore Heavy Transport's (OHT)  48,000 dwt semi-submersible offshore wind farm foundation installation vessel, Alfa Lift, is progressing at CMHI Shipyard in China.

Currently 78 of the 162 blocks are installed in the dock. The hull structural steel construction of the remaining blocks is also taking shape; in total 103 of the 162 blocks have reached the non-destructive testing completion status.

The vessel is expected to be ready for project deployment from early 2021. The design has been developed by OHT in close cooperation with Ulstein Design & Solutions BV, Liebherr and DNV GL. The vessel will fly the flag of the Norwegian International Ship Register. It is designed to enable the company to take on full transport and installation scopes for foundations for offshore wind farms.

The custom-built offshore wind foundation installation vessel, featuring a 3,000 ton Liebherr crane and more than 12,300 square metres of available deck space. The main deck will incorporate an automated skidding system, whilst the forecastle deck will carry transition pieces and mission equipment. The vessel has a capacity to carry a total payload of up to 51,250 tonnes.

The vessel has a total length of 216.3m, and a breadth of 56m. It is said to be capable of transporting and installing up to 10 x 1,500 ton jacket foundations or 11 x 2,000 ton monopiles together with transition pieces and mission equipment.

It is designed with battery hybrid propulsion, it has an exhaust gas scrubber and is Tier III compliant, all in order to protect environment. To enhance sea state limitations and reduce weather downtime,
Alfa Lift has the capability to submerge offshore during the installation operation.

The vessel has been lined up for the construction of  installation of monopile foundations and transition pieces for the
Doggerbank Creyke Beck A and Doggerbank Creyke Beck B offshore wind farms.

For more information on offshore wind farm construction vessels, click here.

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