BELOW THE HOOK Ӏ SECTOR SNAPSHOT
10 m/s. The traditional approach worked at wind speeds up to 8 m/s, depending on the rotor blade type. The system is being used by
Enercon – a manufacturer and service provider for onshore wind turbines. "On average, using the APS saves us 2.3 working days per construction site, when otherwise installation would have to be put on hold because of weather conditions," explains Klaas Schumann, Enercon site engineer. The RBC and APS are controlled
“The client has used smaller
beams from Britlift and loved them, so it made sense for us to ask them to quote for these larger projects,” said Montgomery. “The client was so impressed that we awarded Britlift a contract for the next beam, which is 200t capacity. Slings are another crucial piece of lifting equipment used below the hook in the offshore wind arena. In 2024 Groningen, Netherlands- headquartered manufacturer of Extreema slings and polyester heavy lift soft slings Lift-Tex Heavy Lift Slings, for example, completed what it describes as ‘an immense order of slings’ for an offshore wind energy project. Within this order it made its largest sling ever with a capacity of 4200t MBL.
BLADE LIFTING BEAM The handling and installation of wind turbine blades and rotors is another area in which below the hook products are key tools. Memmingerberg, Germany-
headquartered machine and gripping technology specialist Ematec, for example, has collaborated with Danish engineering company Seasight Solutions to create a wind turbine
22 CRANES TODAY Two yellow
Verton SpinPods control the rotation of each pipe- spreader while loading pipeline- sections into the hold of a Spliethoff vessel
rotor blade lifting beam that comprises Ematec's RBC yoke combined with Seasight’s Automatic Positioning System (APS). Two propellers are flange- mounted to the traverse so that guide ropes can be dispensed with when installing the rotor blades. The two propellers can
compensate for higher wind speeds and are better at stabilising the rotor blade compared to the previous method of using guide ropes controlled by workers on the ground, Ematec claims. This makes it possible to install rotor blades at wind speeds up to
by two remote control units. One person controls the process from the ground until the component reaches a certain height; then, control is transferred to a second person in the hub who completes the lifting and installation process. The energy supply is via a
redundancy system with two power generators. This ensures that even if one generator fails, the component can still be lowered to the ground safely. Doing away with the guide
ropes has also reduced the working radius required for rotor blade installation. "In particular for challenging sites, such as in the forest or in the mountains, near the water or near major industrial sites, this new system makes work at the construction site faster,
Hendrik Veder
Group UK can now supply test weights from Test and Lift
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