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At the Gate to the World: Terex® CTT 91-5 and CTT 161A-8 Tower Cranes Do Lifting Work at the St. Pauli Landungsbrücken Piers in Hamburg
ZWEIBRÜCKEN, Germany, October 15th,2015 – On behalf of Köster AG, Trittau-based Proschwitz GmbH used its Terex® CTT 91-5 and CTT 161A-8 flat top tower cranes while helping build the new seven-story BOA VISTA office building in Hamburg.
The two Terex tower cranes spent about twelve months in view of the world-famous St. Pauli Landungsbrücken Piers in Hamburg while working under unique conditions. “Projects in urban downtown settings are always associated with special challenges, and that’s especially the case when it comes to a big, lively city like Hamburg,” explains Proschwitz GmbH General Manager Detlev Proschwitz.
Pressed for space, pressed for time
The first challenge was the lack of space around the areas where the two Terex tower cranes would be erected. In fact, just getting the cranes from Proschwitz’s headquarters in Trittau to the work site with 13 trucks was already a small logistical challenge despite the short distance of 35 kilometers – after all, cramped downtown areas are hardly the natural habitat of heavy goods vehicles. Despite this and the limited space conditions at the actual work sites, however, the Proschwitz team was able to erect the two cranes on time, with each one taking only one day and three assembly technicians. “We didn’t have any more time available anyway, as we had to keep the necessary road closures to a minimum. That’s where the CTT cranes’ ease of erecting really came through for us,” Proschwitz emphasizes. And it is one of the key reasons why his company consistently relies on Terex products when it comes to tower cranes: The Proschwitz Group’s rental fleet features a total of over 100 flat top and hammerhead tower cranes – all Terex models. “The feature with the transfer masts that work on both model ranges enables us to use a variety of combinations and tackle all kinds of challenges in a flexible and cost-effective manner,” Proschwitz says while explaining his preference for Terex tower cranes. He also mentions their competitive prices, as well as the fact that experience has shown that they keep their value well, as additional points in favor.
In addition, the two Terex tower cranes had another feature that made it seem as though the units were simply destined to work on the project at the Hamburg site – their variable frequency drives, which guaranteed low inrush currents, protecting the city grid from unmanageable voltage fluctuations. “If there was one thing we really didn’t want to do, it was to leave the Landungsbrücken Piers without electricity,” as Detlev Proschwitz succinctly puts it.
For the project at the St. Pauli Landungsbrücken Piers, the Proschwitz team erected the CTT 91-5 flat top tower crane free-standing on a C38 cruciform base, and the CTT 161A-8 flat top tower crane on cast-in-place anchors. With a jib length of 40 meters and a hook height of 49.5 meters, the CTT 161A-8 was perfectly set up to lift construction materials weighing up to 4.15 tonnes from the jib tip. Its maximum lifting capacity was eight tonnes. The CTT 91-5 was set up with a jib length of 30 meters and a hook height of 40.8 meters. With this setup, it was able to pick up loads of up to 3.3 tonnes.
With these configurations, the two Terex tower cranes performed their work smoothly and reliably for a total of twelve months, even when exposed to wind and inclement weather. As a result, Construction Manager Robert Friske from Köster AG, the primary contractor on the project, was also completely satisfied with the Terex machines: “The high-pressure deadlines normally involved in this type of construction projects mean that we can’t afford any equipment downtimes. This means that dependable machinery, such as these two tower cranes, is crucial to a successful project completed on time,” Robert Friske pointed out.
Disassembly in record time
After the work was completed, the cranes needed to be disassembled quickly, as both the port’s anniversary celebration and the Hamburg Marathon were just around the corner. Due to the extremely constrained space conditions, it was not possible to tear down the CTT 91 crane using a mobile crane. However, the fact that the tower crane can be easily dismantled into smaller components meant that the CTT 161crane was able to take care of the task and safely disassemble its “smaller sibling.” “The option of being able to disassemble the slewing unit came in really handy,” explains Proschwitz. “There’s no other machine with that available!”
After the CTT 91 was dismantled, the CTT 161 was disassembled in 6 hours with the help of a mobile crane.
About Proschwitz GmbH
Trittau-based Proschwitz GmbH, which was founded in 1985 and employs 21 people, specializes in Terex tower crane and self-erecting tower crane rentals, among other activities. Its fleet features over 100 Terex cranes, with most of them belonging to the CTT and SK model ranges. Moreover, it now also features five models from the new Eazy 90 model range in addition to older Peiner SMK models. With its reliable customer service and spare parts service, as well as its professional assembly, disassembly, and commissioning services performed by experienced technicians, Proschwitz GmbH has gained an extraordinary reputation as the go-to crane service provider in the industry. In addition to this, Proschwitz GmbH also operates as a distributor of Ammann Elba Beton concrete mixing plants.
For more information, please visit www.proschwitz.de
Terex Corporation is a lifting and material handling solutions company reporting in five business segments: Aerial Work Platforms, Construction, Cranes, Material Handling & Port Solutions and Materials Processing. Terex manufactures a broad range of equipment serving customers in various industries, including the construction, infrastructure, manufacturing, shipping, transportation, refining, energy, utility, quarrying and mining industries. Terex offers financial products and services to assist in the acquisition of Terex equipment through Terex Financial Services. Terex uses its website (www.terex.com) and Facebook page (www.facebook.com/TerexCorporation) to make information available to its investors and the market.
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