Comansa builds customised tower crane for Norwegian yard
Comansa and Rental Group Crane AS technical team have responded with agility to meet the specific needs of Aibel’s yard by deploying a 50-ton tower crane with a 80-m boom.

The tower crane manufacturer and the technical team of its Norwegian distributor Rental Group AS deployed Comansa’s 21LC1050 for the Aibel yard at Haugesund (Norway), where the 50-ton tower crane adapted to the customer’s needs through a detailed customisation process. This tower crane has earlier worked on the construction of the Johan Sverdrup Phase 2 (JSP2) process platform (Aibel’s biggest project to date) and has been used to lift very different loads. Its 80-m boom length has made it possible to reach the entire platform with a single tower crane.

The Comansa tower cranes provide the right application solutions in ports and yards. The tower cranes for yards must meet stricter requirements than in purely constructive projects (arising from closeness to the sea, weather conditions, transit of vehicles and persons, and the fact that they are used for various projects). This was once again achieved by Comansa and the Rental Group Crane AS technical team for Aibel.

Reinforced portal
To meet the demands of the project (withstand the 400-ton per corner that originates from a crane of more than 90 metres in a D25 wind zone, and facilitate worker and vehicle transit) Comansa built a reinforced portal of 10 metres, which was assembled by its Norwegian distributor in the yard. Furthermore, the portal means it can be used in two ways: with movement on rails so it can be transported from one side to another and supported with levelling screws.

Designed to withstand inclement weather
Due to the yard's geographical location, close to the North Sea, the tower crane is designed to withstand wind pressure pursuant to European D25 standards. And to protect it against inclement weather, Comansa has used special protection elements and materials, as well as a 250-micron paint to prevent corrosion.

Safety equipment
The tower crane is equipped with numerous options to guarantee safety at all times. These include a vision camera on the trolleys to view the loads and the environment more safely, alarm signals, high-luminosity LED lights on the boom for the area workstations with on/off from the ground, signalling lights as per EN14439 standards, counterweights protected with galvanised steel frames, stainless steel electrical cabinet, activation of the wind-release system from the base of the crane, etc.

More agile assembly due to Flat-Top design
With its ease of assembly and less space requirement, Comansa’s Flat-Top design has made it possible to overcome the logistical challenges arising from installation in a small (600-700 sqm) and windy space like the Norwegian yard. The Aibel yard lent its facilities and helped to pre-assemble the necessary parts (which arrived in 32 lorries). For the assembly, a 500-ton mobile crane with a height of 115 metres was used. The heaviest piece to assemble was 23 tons. Once the foundation was laid and the portal installed, the crane was assembled in just two days.

Technical service
The speed when it comes to having spare parts and being able to move the crane to another point in the yard to undertake new projects is essential. Rental Group Crane AS's technical service is only two hours from Aibel and can provide parts such as moving or electrical elements, in addition to support. Comansa can also provide other types of special parts in just one day.
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