Impressive elevator technology
In February and March 2016 the thyssenkrupp elevator plant in Neuhausen delivered the two drive units for the test TWIN elevators and the drive for the visitor elevator to the test tower site in Rottweil.
The first elevator was installed by February 2016 and taken into operation as a construction elevator at the end of that month. The future fire service elevator, acting as a temporary construction elevator, has replaced the external Alimak construction lift, which was dismantled at the end of March. The installation of the fire service elevator at the beginning of the year had to overcome some particular challenges: First of all it had to be done with no intermediate floors in the tower, as they had not yet been installed at that time – the concrete tube was open to the ground. The elevators were installed without scaffolding using a self-propelled installation platform. Rottweil was also experiencing extreme temperatures as low as minus 18°C at the time the drives were being hoisted into position. Snow and ice lay on the tower platform. And the tower also moved much more under the influence of the wind and sun, as the tuned mass damper was not yet in operation at that time.
At almost 2 meters high the SF 700 drive, which among other things will be used for the visitor elevator, is as tall as a man and even without its frame weighs 6,500 kilograms. The Liebherr 280 EC-H 12 Litronic high-top crane, which at the time was still installed on the test tower, lifted the drive effortlessly and lowered it carefully from above into the tower with pinpoint accuracy. As so many times, the precision with which the crane operator worked was truly impressive.
In the machines rooms at heights of 217, 222, 226 and 240 meters, the drives and the deflector sheave were moved into position. They are expected to be in operation here for the next 40 years, or 40,000 operating hours. The three TWIN machine room levels were built with the aid of steel scaffolding before installation of the elevator components.
In May the panoramic cab of the visitor elevator was then installed in the glazed shaft on the northern side of the test tower. Thanks to its aerodynamic cladding, it will be able to travel at a speed of up to 8 m/s, i.e. 28.8 km/h.