(Tool deployed : Lock nut cylinders - gravity return)
It is common that the sliding roof of sports arena’s such as soccer stadiums for example are carried by a pillar construction. Thorough inspection sometimes proofs that these constructions are too weak to support the entire roof. This has been the case with the Rhein Arena stadium in Düsseldorf, Germany.
Lifting solution and more
The contracting company involved used Holmatro cylinders for lifting the roof in order to reinforce the pillars. The type of cylinders that were used in this particular situation were lock nut cylinders, each with a capacity of 250 tons.
A lock nut cylinder does not only lift loads, it is also designed to hold, stabilize and mechanically secure loads for a longer period of time. The lock nut itself is located on the threaded plunger and can be screwed down as soon as the load has been lifted to the desired level. Afterwards the load is secured which means that the pressure can be taken off the system. This makes the lock nut cylinder the only type of cylinder eliminating the need for a separate support system (e.g. wooden beams stacked up between ground level and the uplifted object to hold it in place).
Standard as well as custom-specific
Holmatro’s standard range of lock nut cylinders comes in many models with capacities from 10 to 250 tons, different heights and stroke lengths, single or double acting. Because each situation is different Holmatro also offers custom-made solutions for specific applications and circumstances.