46 Projet general descrition and structural concept Architecture The Tower Zlota 44 will emerge from the very centre of Warsaw like a shining sculpture culminating at 192 m above ground. The building consists of an elegantly curved tower sitting eccentrically on top of a 54x36 m podium with two 67x51 m basement levels. Going from top to bottom, the project is organised as follows: • 45 levels of residential apartments • 1 level of amenities including a 25 m swimming pool, fitness centre, spa and hammam • 1 level of mechanical equipment • 6 levels above grade car park • 1 ground floor level with a main lobby, retail space and a restaurant • 2 basement levels dedicated to technical rooms and car park Structural concept and particularities The structure is essentially made of cast in situ reinforced concrete. A central concrete core stiffened with fin walls projecting up to the façade provides the horizontal bracing and is completed with internal and façade columns to give the vertical support to the slabs. The fin walls and perimeter columns follow the curves of the building in gently varying slopes. The typical floor system consists of a 220 mm thick RC flat slab spanning 7 to 8.25 m in two ways between the walls and the columns. An 800 mm deep downstand beam runs around the perimeter of the building and is required for both structural and fire protection reasons. At the interface between the tower and the podium, a transfer zone consisting of inclined columns and transfer beams is designed to accommodate the geometrical requirements dictated by each identity. The horizontal force component resulting from the inclined elements is tied back with Macalloy bars or cables that are post tensioned in phases as the construction progresses. At the roof, steel structure is used to support the large parapet walls and the complex roof shapes. The part of the building located under the tower is founded on a 2 m thick raft and barrettes acting together to transfer the load to the ground. Under the part of the podium adjacent to the tower, the building is founded on a 1.5 m thick raft without barrettes. Used software: Scia Engineer, ESA-Prima Win ZLOTA 44 - 200 m high tower in Warsaw Besix was proud to be awarded the contract in 2007 for the design and build of the Zlota tower that will emerge from the very heart of Warsaw like a shining sculpture culminating at 192 m. Designed by Daniel Libeskind for ORCO Property group, the tower accommodates 251 luxury apartments and sits on the side of a podium having 9 levels above ground and 2 below. The podium incorporates a retail area, an amenity floor, plant rooms and secured parking. Wrapped in curtain wall, the structure is essentially made of cast in situ reinforced concrete braced with a central concrete core stiffened with fin walls projecting up to the façade. It also includes a load transfer zone between the tower and the podium and is founded on a piled raft. The building was entirely calculated with ESA-Prima Win using a general model counting 54000 nodes of which local models were extracted when necessary. Owner: ORCO Property Group Architect: Architekt Daniel Libeskind Ag General Contractor: Besix SA Engineering Office: Besix Engineering Department Construction Start: 15/01/2008 Construction End: 31/10/2010 Location: Warsaw, Poland Project Information Short Description CAE Housing & Buildings 2 BESIX Contact Jean-Marie De Bel Address Av des Communautés 100 1200 Brussels, Belgium Phone +32 2 402 62 11 Email [email protected] Website www.besix.com BESIX Group is the largest Belgian construction group, a conglomerate of companies active in the construction, engineering, environmental, real estate and concession sectors. In 1909, Jacques-Marie and Charles Stulemeijer see potential in prestigious construction projects in Belgium and set up the Société Belge des Bétons (SBB). They immediately earn their reward with the rebuilding of Belgian ports and canals, in the aftermath of the war and soon the activities expand in France and Spain. In 1947 SBB recognizes the extraordinary market potential in former Belgian Congo and, together with the Belgian Group Empain, creates a common subsidiary Auxeltra-Béton. Large projects in the Middle East demand a new organization from 1966. The six companies of the SBB Group form Six Construct. The success in this new region becomes considerable. Since then, the group has known impressive and regular growth with the acquisition of new companies such as Entreprises Jacques Delens in Brussels, Etablissements Jean Wust in Wallonia and Vanhout in Flanders and, more recently, Van Britsom (Oostkamp), Verheye (Diksmuide), GRWestkust (Diksmuide) (50%), Socogetra (Awenne) and Cobelba (Naninne). In the meantime, the company has entered the Egyptian and Libyan markets, it has also becomes an important player in France and the Netherland and has realized impressive projects in India, Russia, Poland, the Czech Republic, Slovakia, Algeria, Morocco and many other countries. In 2004, thirteen managers of BESIX and its subsidiaries, together with Orascom Construction Industries, execute a management buy-out. SBB becomes BESIX Group, firmly anchored in Belgium. Today, BESIX and its subsidiaries cover practically all fields of the construction industry and are operating in Western Europe, in Central and Eastern Europe, North and Central Africa, in the Middle East, in Central Asia and in the Caribbean. The Group realized a turnover of approximately 1.6 billion Euros and employs over 20.000 people worldwide. The Group intends to be a leading international player, serving Western and Central European markets from its home country Belgium, and covering the Middle-East from the United Arab Emirates. The success of the group is the result of: • A commitment of upholding the highest standards of quality, reliability, professionalism and performance. • The permanent seek of innovative ways to increase its expertise and enhance its performance. • Providing a safe work environment • A particular care for the teamwork spirit and the respect of individuals • Taking new challenges that will strengthen the reputation and open new horizons.
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