Global green and heavy haulage contractor Sarens, whose head office is in Wolvertem, Belgium,
took delivery of a new LR 11000 crawler crane from Liebherr in the spring. For its first job, the
new 1000 metric ton crane was assembled at Oostpolder wind farm, which is currently being
built to the south of the Dutch port of Eemshaven. Sarens received the order from there to erect
Enercon E-136 EP5 wind turbines with a hub height of 508 feet (155 meters).
Ehingen (Donau), (Germany), 29 June 2021 – Sarens’ new LR 11000, featuring the very latest crawler
crane equipment such as the SL10DF2BV wind power boom system, VarioTray and V-Frame, has
everything it needs for erecting the 4.65 MW wind turbines in the north of the Netherlands. The heaviest
component of the turbine is its generator, which weighs 120 metric ton and has to be installed on a tower
around 508 feet (155 meters) in height. Sarens Project Manager Pascal van der Spoel explains: “We
decided to purchase the LR 11000 because it has a very flexible derrick system with VarioTray and V-frame. What’s more, its boom length and capacity are ideal for the projects we have scheduled.”
The special SL10DF2BV wind power boom system on the LR 11000 delivers maximum lifting capacities
for the economical erection of the very latest generation of wind turbines with hub heights of up to 590
feet (180 meters). For these turbines, the LR 11000 reaches a hook height of 630 feet (192 meters) and
can hoist an impressive 110 metric ton. At the Oostpolder wind farm, Sarens assembled the new 1000
metric ton crane with a 531 foot (162 meter) main boom and 39 foot (12 meter) fixed jib. This
configuration enables the crane to hoist up to 156 metric ton with hook heights of up to 571 feet (174
The VarioTray detachable ballast pallet enables crane jobs to be completed economically – after raising
the lattice boom with the large derrick ballast, part of the ballast can be unbolted quickly and easily. Only
a small proportion of the ballast is generally required for hoisting work with the boom fully or almost fully
raised. This avoids the need for the tiresome stacking and unstacking of ballast slabs.
The new V-frame ballasting system is used for the suspended ballast – a hydraulically adjustable frame
enables the ballast radius to be adjusted to up to 98 feet (30 meters). This means that a rigid ballast
guide is no longer required for large radii.New luffing jib based on the SL10 main boom lattice sections
As Sarens is a global company, it is important that its cranes can be used universally. The company
therefore also ordered additional equipment for the LR 11000, which enables it to convert the wind
power boom into a powerful luffing jib system for use in industrial environments.
The long wind power boom contains a very large number of intermediate sections. These cannot be
used in the standard luffing jib as it is designed to be lightweight and easy to transport. However,
Liebherr has created a solution for using the existing lattice sections to create a particularly powerful
luffing jib – the heavyweight sections of the wind power boom are used for the main boom and the
slightly lighter ones for the luffing jib. Only the W assembly unit is then required as an additional module.
The very strong boom with a powerful luffing jib created in this way can deliver lifting capacities close to
those possible with the Powerboom combination (PDW3B system). To create the name, the “10” has
been adopted from the SL10 boom – with the full combination being known as the S10DW4B. The new
boom can also be used without a luffing jib in the form of the S10DB main boom which delivers excellent
lifting capacities. The V-Frame is compatible with both systems.
About Sarens : Sarens is a global leader and reference in crane rental services, heavy lifting, and engineered transport. With state of the art equipment, value engineering, one of the world’s largest inventories of cranes, transporters, and specialty rigging equipment, Sarens offers creative and intelligent solutions to today’s heavy lifting and engineered transport challenges. With more than 100 entities in 65 countries operating without borders, Sarens is ideal partner for small-scale to mega scale projects. Sarens currently employs 4543 highly skilled professionals who are prepared to support the clients’ requirements around the globe and across every market sector. (www.sarens.com)
Liebherr USA, Co.
4800 Chestnut Ave
Newport News, VA 23607
Tel: +1 757 240 4250
E-Mail: [email protected]