Liebherr BOS series
| Liebherr BOS series | |
|---|---|
Liebherr BOS crane (right) on the Floatel Endurance | |
| Overview | |
| Manufacturer | Liebherr-Rostock GmbH |
| Production | 1975 - present |
| Assembly | Rostock, Germany Nenzing, Austria (formerly) |
| Powertrain | |
| Engine | electric or diesel engine |
| Transmission | hydrostatic |
The Liebherr BOS series is a family of offshore cranes manufactured by Liebherr-Rostock GmbH, a subsidiary of the Liebherr Group.
The crane family is designed for heavy-lift, maintenance and supply operations on offshore installations and comes in electro-hydraulic, diesel-hydraulic or all-electric configurations.
History
Liebherr delivered its first BOS crane B10/17 EX in 1975 for installation on the FPSO unit Princess Aweni.[1]
In 2015, the Liebherr plant in Nenzing sold its 1,000th offshore crane. This figure includes both BOS cranes and RL cranes from the Liebherr RL series.[2]
As of November 2025, a total of 502 BOS cranes had been produced and installed worldwide. The United Kingdom, Brazil, and Norway rank among the largest markets.[1]
Design and engineering
Structural design
The BOS crane is a slew-bearing, rope-luffing crane equipped with a lattice boom. It is offered in a range of sizes, with lifting capacities of up to 1,400 t (1,400 long tons; 1,500 short tons). The crane can be fitted with a boom length of up to 102 metres, meeting the requirements for offshore wind farm installations.
Following a design revision in 2005, the BOS series adopted a configuration that Liebherr now regards as the industry standard; The update introduced a division between the A-frame and the machinery housing, replacing the earlier concept in which the drive system was integrated into the turntable with the A-frame mounted on top.[1]
Representative models and technical data
The series includes multiple models, which are differentiated by their boom length and lifting capacity. The number in the model name represents the overturning moment in ton-metres.
| Model | Maximum lifting capacity[5] | Maximum outreach |
|---|---|---|
| BOS 2600 | 75 t (74 long tons; 83 short tons) | 57 m (187 ft) |
| BOS 4600 | 140 t (140 long tons; 150 short tons) | 69 m (226 ft) |
| BOS 4600 E | 100 t (98 long tons; 110 short tons) | 69 m (226 ft) |
| BOS 7500 | 300 t (300 long tons; 330 short tons) | 84 m (276 ft) |
| BOS 14000 | 600 t (590 long tons; 660 short tons) | 102 m (335 ft) |
| BOS 35000 | 1,250 t (1,230 long tons; 1,380 short tons) | 102 m (335 ft) |
| BOS 45000 | 1,400 t (1,400 long tons; 1,500 short tons) | 102 m (335 ft) |
References
- ^ a b c "Celebrating 50 years of innovation: Liebherr BOS cranes mark a major milestone". Liebherr.
- ^ "Liebherr Delivering the 1,000th Offshore Crane Order". Offshore Technology.
- ^ "Seafox 5" (PDF). Seafox Operations BV.
- ^ "Wind Server". Ziton A/S.
- ^ "Board offshore cranes". Liebherr.
External links
- Liebherr: Board offshore cranes - Liebherr-International Deutschland GmbH