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EDGE East Side Tower: (Still) Berlin's tallest skyscraper Press Release / September 2023 EDGE East Side Tower: (Still) Berlin's tallest skyscraper Between the Warschauer Brücke, the East Side Wall and the Mercedes-Benz Arena stands Berlin's tallest skyscraper at 142 meters: the EDGE East Side Tower. The building's innovative architecture by Bjarke Ingels was brought to its final height in only 20 months, partly thanks to the strong cooperation between Züblin and Doka. When an architectural design from the Bjarke Ingels Group comes along, you recognise it: it looks playful, but from a structural point of view it is serious. The bold ideas of the Danes often give building contractors a headache, whilst spurring their inventive and tinkering spirit. The most recent example in Germany is the EDGE East Side Tower in Berlin. The terraced exterior cubature is visually striking and structurally challenging. And there were plenty of challenges beyond that: Lack of space, a tight schedule, limited crane capacity and the many semi- and prefabricated concrete parts around the core. The successful completion of the shell on time, despite all challenges, can be attributed in part to the strong partnership between Züblin construction company and Doka, which began during the early bidding phase. Hybrid construction in the core shaft The backbone of the EDGE East Side Tower is its reinforced concrete core, a hybrid of in-situ concrete and precast concrete components. Doka's technicians planned the formwork solution entirely in the BIM software Revit during the planning phase in order to identify and avoid possible disruptions and to ideally coordinate the formwork cycle with the site cycle. There were plenty of tricky tasks. One was to meet the high demands of the fair-faced concrete surface, while maintaining the tight schedule on the construction site. Perhaps the greatest challenge was the technical implementation of the hybrid solution. On the one hand, there was extremely little space to position the formwork – the site crane was located inside the shaft, where the core formwork was also moved hydraulically with the climbing system. On the other hand, the crane’s capacity was very limited. However, the crane was necessary to integrate the precast elements into the climbing formwork, among other things. For this reason, the site and Doka coordinated precisely in order to use the buffer times when the crane was not in use for placing the formwork and to thread the precast elements. The support of Doka's formwork instructors and colleagues from the formwork pre-assembly department was vital for the delivery and assembly of the climbing formwork and protection shields. A representative from Züblin commented that progress was made safely and swiftly thanks to their experience. The hydraulic climbing system Xclimb 60 was used for the first time in monolithic construction (slab-wall method) to build the core, which was combined with the Top 50 core wall formwork. Save and fine-tuned operations At the outer edge of the slab, the site crew was protected by a crane-guided protective shield. By combining scaffolding tubes with coarse- and close-meshed nets, it was possible to reduce the shield's dead weight and its wind-attack surface to a minimum. The stair-like recesses on the façade were a particular challenge for Doka's engineers, as the usual anchoring points for the shield became inoperable. Doka's solution was to mount a telescopic strut on the protective shield. This meant that only one floor-slab support level was needed in height. The protective shield protruded over two storeys with a height of 8.84 m above the previous concreted slab. With this solution, the crane lifts could be reduced by half. Due to the low slab thickness of 18 cm and the prefabricated construction method, close coordination between Doka, the site managers and the structural engineer was essential. The Doka statisticians, for example, checked the bearing loads on the respective floors and were thereby able to produce a detailed load specification for the structural engineer in order to ensure the safety of the load transfer inside the structure. In practice, the shields were installed by Doka's formwork pre-assembly team at an assembly site about 1 km away and hung on the structure on site just in time. The site managers worked with Doka to develop a special transport trestle that was mounted on a low-loader to meet the logistical challenge of transporting the fully assembled – and thus very large – elements from the assembly site to the site crane under a bridge. The construction process went so smoothly that the shell was completed several weeks ahead of schedule. This strong cooperative partnership will be continued on the construction of the MYND Tower on Berlin's Alexanderplatz, for which Züblin and consequently Doka were able to secure the contract. Here, the partnership was underpinned in the bidding phase by the award of the shell construction work. The EDGE East Side Tower is scheduled for completion this year. It has already been given its glass shell, and work is currently underway on the interior fittings. Amazon will be the largest tenant. In brief: Project: EDGE East Side Tower Location: Berlin Type of building: High-rise with mixed use Construction: Ed. Züblin AG Total construction period: 2019-2023 Doka services: Project management, Formwork planning, Formwork pre-assembly, Formwork instructors, Pre-assembly services Doka products: Framax Xlife plus, Framax Xlife, Dokaflex 20, Shoring system Staxo 100, Climbing system Xclimb 60, Large-area formwork Top 50, Framed formwork Frami Xlife, Suspended stair tower, Protective shield Xclimb 60 Photos: In case of publication, please indicate the photo credit ©Doka. The EDGE East Side Tower (142 m), currently the tallest building in Berlin, was completed to its final building height in just 20 months. Photo: EDGE East Side Tower_1 Copyright: Doka Hybrid of in-situ concrete and precast elements: The (formwork) work in and around the high-rise core. Photo: EDGE East Side Tower_2 Copyright: Doka Constructive and cooperative collaboration in planning and execution: Doka formwork instructors Jörg Otte and Züblin site manager Sebastian Ortmeier. Photo: EDGE East Side Tower_3 Copyright: Doka The terraced exterior cubature, designed by BIG, was a challenge in terms of construction, both structurally and in terms of formwork. Photo: EDGE East Side Tower_4 Copyright: Doka The professionals at Doka's formwork pre-assembly team have every move under control. Photo: EDGE East Side Tower_5 Copyright: Doka According to the principle of "Rough & Wild", the tower fits in well with the surrounding buildings. Photo: EDGE East Side Tower_6 Copyright: Doka About Doka: Doka is a world leader in providing innovative formwork, solutions and services in all areas of construction. The company is also a global supplier of well-thought-out scaffolding solutions for a varied spectrum of applications. With more than 178 sales and logistics facilities in over 60 countries, Doka has a high-performing distribution network for advice, customer service and technical support on the spot and ensures that equipment is swiftly provided – no matter how big and complex the project. Doka employs 7, 000 people worldwide and is a company of the Umdasch Group, which has stood for reliability, experience and trustworthiness for more than 150 years. Press contact Deutsche Doka Schalungstechnik GmbH Sabine Götz T: +49 (0) 81 41 / 3 94-62 05 M: +49 (0) 1 71 /8 11 95 51 sabine.goetz@doka.com www.doka.de |
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