In a contract that fills a hundred file folders, property development and investment company Art-Invest Real Estate has commissioned Ed. Züblin AG as main contractor to realise the project Alter Wall Hamburg. Alter Wall Hamburg is an approximately 150 m long shopping boulevard with 18,000 m2 of offices and 12,000 m2 of retail space designed by the renowned architectural firm Gerkan, Marg & Partners (gmp). ZÜBLIN´s business units Turnkey Construction Hamburg/Schleswig-Holstein and Structural Engineering Nord will handle construction as well as the mechanical and electrical installations, with building construction set to begin in the spring of 2016. The full range of construction works, with a contract value of about € 80 million, is scheduled to be completed in the summer of 2018.
Art-Invest is investing a total of around € 250 million in the site, which had already been a vibrant shopping street around 1900, to create another attractive central location that includes an approx. 150 m long shopping boulevard, a pedestrian bridge over Alsterfleet canal, exclusive office space, and an underground car park with a capacity for 220 vehicles. The overall concept also comprises the integration of the nearby Bucerius Kunst Forum (around 200,000 visitors a year), which will move into the centre of the complex and grow from 2,500 m² to 3,400 m² on four storeys to help breathe life into the project’s theme of “Tradition, Art and Quality”.
The new building will be housed behind historical façades on 13 levels: four for the underground car park, three for restaurants and shops, and six for offices. The Bucerius Passage planned for the middle of the building ensemble will lead over a new pedestrian bridge to Neuer Wall.
Securing the historically listed façade
The construction works to be carried out by ZÜBLIN in the central part of the city are quite challenging technically: the new bridge over the canal will need to be floated into place; the ramp to the underground car park will be built in an open construction pit 7 m deep; and to preserve the historically listed façade, it will be secured at every storey during building construction. Alter Wall will also feature many architectural highlights: an 80 m long glass roof will top the building over an atrium in the interior; and the canal-facing façades on the outside of the building will be clad with natural stone to lend them a similar look to the historically listed portions of the building.
LEED certification (Leadership in Energy and Environmental Design) is being sought for the building. The Alter Wall project is an important part of the Hamburg Business Improvement District (BID) Nikolaiquartier. The aim of the BID is to make the locations around Hamburg City Hall and the Chamber of Commerce more attractive.
STRABAG SE is a European-based technology group for construction services, a leader in innovation and financial strength. Our services span all areas of the construction industry and cover the entire construction value chain. We create added value for our clients by our specialised entities integrating the most diverse services and assuming responsibility for them. We bring together people, materials and machinery at the right place and at the right time in order to realise even complex construction projects – on schedule, of the highest quality and at the best price. The hard work and dedication of our 73,000 employees allow us to generate an annual output volume of about € 14 billion. At the same time, a dense network of numerous subsidiaries in many European countries and, increasingly, on other continents is helping to expand our area of operation far beyond the borders of Austria and Germany. More information is available at www.strabag.com.
Stuttgart-based Ed. Züblin AG has about 14,000 employees and, with an annual output of over € 3 billion, is one of Germany’s leading construction companies. Since it was founded in 1898, ZÜBLIN has been successfully realising challenging construction projects in Germany and abroad and is the number one in the German building construction and civil engineering segment. The company’s range of services comprises all construction-related tasks – from civil engineering, bridge building and tunnelling to complex turnkey construction to structural timber engineering and public-private partnerships. ZÜBLIN attaches great importance to partnership-based cooperation, and our ZÜBLIN teamconcept has proved its value as a successful partnering model for more than 15 years now. Current construction projects of the company, a subsidiary of globally operating STRABAG SE, include the new Axel Springer building in Berlin, Messehalle 12 in Frankfurt and the Albabstieg Tunnel along the new Wendlingen–Ulm railway line. More information is available at www.zueblin.de