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Project of the Month: DC Tower 1, Vienna, Austria

Donau City Tower 1, known as DC Tower 1 for short, is an innovative and modern landmark on the Vienna skyline. Standing 250 metres tall, the distinctive design relied extensively on Peikko’s MODIX® and PSB® solutions.

DC Tower 1 accommodates a variety of multifunctional spaces on its 60 floors, including international business offices, a hotel, a restaurant, a bar and a gym. The hotel includes a restaurant and lounge on the 57th floor, which offers a wonderful 360° panoramic view where guests can see from the Wienerwald all the way to Bratislava.

 DC Tower 1 and the 360° panoramic view

Outstanding design and sustainability

Located in the centre of Vienna, Austria, the sparking black tower was designed by renowned French architect Dominique Perrault. The building is notable for its slimness and its dramatic, multi-dimensional façade. However, beneath the surface, the building is also designed to minimise energy consumption and operating costs, and in 2015 it was certified as a “Green Building”, with Platinum LEED certification.

Built using over 85,000 Peikko products

Peikko was pleased to be selected for several key aspects of the DC Tower 1 project, and we supplied significant quantities of both our MODIX® Rebar Coupling System and our PSB® Punching and Shear Reinforcement System – over 85,000 pieces in total.

The structure was developed using the "finite element method", which involved extensive research, including wind tunnel studies on the influence of wind and the reaction of the support structure. The horizontal forces are split by "outrigger-type constructions" between the core and the columns to relieve the inner core and transfer forces to the supports. An anti-vibration construction designed as a mass pendulum was also used to increase comfort at the top of the building.

Peikko supplied significant quantities of MODIX® and PSB® solutions – over 85,000 pieces in total.

 MODIX<sup>®</sup> Rebar Couplers are used to create mechanical connections between ribbed reinforcement bars in cast-in-situ and precast concrete structures.

Peikko MODIX® and PSB® used in Austria’s tallest building

At its heart, the structure of the DC Tower 1 is a combination of a reinforced concrete core and two massive "outrigger-type constructions". 2-metre (6.6 ft) thick reinforced concrete slabs divide the horizontal forces between the core and the supports.

The connections between the individual reinforced concrete members used Peikko’s MODIX® Rebar Coupling Systems. The reinforcing couplers were implemented using over 45,000 MODIX® Coupler connections. The columns were connected with SM36 and in the outrigger ceilings, SM40 was mostly used. SM20, SM26 and SM30 were employed to connect the standard ceilings to the core. While in the stairwells, a so-called "MODIX® BOX" was used. 

To enable construction of slim floors and prevent punching shear failure, more than 40,000 double headed studs with the Peikko's PSB® Punching Shear Reinforcement System were used. Peikko also provided about 12 tons (13.2 US tons) of special steel components that form part of the supporting structure and the connections between components.

The completed tower stands out in Vienna as a bold statement of innovative design, and it relies on Peikko solutions from top to bottom. 

 The reinforcing couplers of DC Tower 1 were implemented using over 45,000 MODIX<sup>®</sup> Coupler connections.

Project facts

  • Height: 250 m
  • Floors: 60
  • Developer: WED AG, Wienb / Vienna
  • Construction Company: Max Bögl, Wien / Vienna
  • Structural Designer: Bollinger-Grohmann-Schneider, Wien / Vienna
  • Architect: Dominique Perrault, Paris
  • Delivery year: 2011-2012
  • Completion year: 2013