Current height

What happens next

In spring 2016 the preparations got underway for the work on the outer membrane. The crane has already transported all heavy parts to the top so it can be dismantled at the beginning of May. Webcam 2 will be removed along with it.

Barely visible from the outside, a great deal has happened inside the tower over the winter of 2015/2016: ceilings have been fitted, stairs added, building systems and elevator equipment installed. At the end of January a huge pendulum was installed inside the tower at a height of 193 meters. It will act as a tuned mass damper and can also simulate vibrations in the tower for test purposes via linear motors. Before closing the top of the test tower in mid-March, the drive units – weighing several tons each – for a wide variety of elevators had to be lowered into position in the machine rooms inside the tower from above by the crane.

The glass balustrade on the visitor platform is complete.

Time-lapse video of construction

Be there live:
Visit us at the construction site

During the construction phase, which is expected to last until the end of 2016, you can visit the public area of the construction site.

A visitor platform and parking lot were constructed at the Berner Feld location in Rottweil. There is free parking for 90 minutes. The city of Rottweil also offers guided tours regularly.

For more information and the registration form, visit:

New: test tower audio tour guide! Download your audio tour guide here (free of charge) to prepare for your visit at the construction site.

The opening of the visitor platform at the top of the test tower is planned for 2017.

Planned opening days: Friday, Saturday and Sunday.


Crane raising: That’s how it works

The ThyssenKrupp Test Tower will reach a height of 246 meters during sliding formwork construction, which began in mid-April and is expected to continue until mid-August 2015. The crane is growing along with it to an even greater height. The hook height begins at 90 meters and climbs to 259 meters. But how does it actually work?

The crane used on Rottweil’s Test Tower construction site is a 280 EC-H 12 Litronic from Liebherr. It is equipped with a powerful 110-kW hoist gear in order to achieve high hook speeds on account of the project’s required hook heights of up to 259 meters.

The 280 EC-H crane is mounted on a 500HC tower system. It consists of individual tower elements measuring 5.8 meters in height. This tower system was selected in order to be able to ensure the largest possible scaling steps and to interrupt the sliding formwork construction as little as possible.

After a free-standing construction at 90 meters hook height, the crane is then gradually scaled up to its final height. There is a scaling unit mounted on the crane tower. It consists of the guide piece and an integrated hydraulic unit. The guide piece encloses the actual crane tower, while the upper part of the crane uses hydraulics to push the tower length upwards. The guide piece is equipped with an appropriate high opening that makes it possible to insert another tower element measuring 5.8 meters in height. This „scaled“ tower piece is subsequently bolted and the process begins again from the beginning. After scaling multiple tower pieces, the crane tower is fixed to the Test Tower using anchoring supports for stabilization and scaling continues to the next intermediate height.

This process can take several days. If the structure has increased in size, it can start again from the beginning until the final height is reached – 246 meters for the structure and 259 meters for the crane.

Watch this YouTube video to learn more:

This video shows the scaling process using a 1000 EC-B 125 Litronic from Liebherr.

A bird’s-eye view of the Test Tower

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