GRAITEC Inc. News
Steel-Glass façade for the most inclined Tower of the world
The façade of the Capital Gate in Abu Dhabi was constructed by Waagner-Biro Stahlbau AG with GRAITEC Advance Steel, the 3D-Software for steel constructions.
The spectacular skyscraper "Capital Gate" was created directly to the Abu Dhabi National Exhibition Center, the biggest area for trade shows and events in the Middle-East. The Capital Gate is 160m high and has an impressive inclination up to 18 degrees. Therefore it is more inclined than the leaning tower of Pisa that has only an inclination of 4 degrees. In the Guinness Book of Records the Capital Gate is already listed as the most leaning tower of the world. The building was erected between 2007 and 2010. It consists of 40 levels and is used as an office complex. In the 16th upper floors a five-star-Hyatt Hotel is located.
Waagner-Biro AG from Vienna was responsible for the modeling, construction, detailing and assembly of this extraordinary and organic formed steel-glass-facade of the Capital Gate. The tower has a polygonal foundation and the facade is one degree per level sloped and twisted. At the most inclined part the facade leans out more than 24m over the ground floor. The main-load bearing structure consists of a diamond structure.
More than 720 diamond elements were field-assembled by triangle sections with the glass and finally mount complete to the main structure. Each of those large-sized elements called "Diamonds" covers two levels and consists of 18 triangular areas and 33 single rods. For the entire facade 23.760 single bars and 12.960 glass panels were used. Because of the complex free formed surface each triangular glass panels and each single bar is unique. All in all more than 1.200 tons of steel and 24.000m2 glass was used for this extraordinary facade.
In order to realize the complex and challenging project in cost and on schedule, the 3D-CAD Software Advance Steel was used for planning. Thanks to its extensive 3D-tools it was easy to model the sculptured surface with nodes, rods and joints between them. GRAITEC Advance processes the entire 3D model data, accelerates all document creation and insures all-around drawing consistency. An in-house programming on top of Advance Steel created all workshop documents (assembly drawings, GA-drawings, BOMs, NC-files) automatically from the 3D model.
Mr. Gert Weimann, head of engineering and construction department at Waagner-Biro AG, explains: "The project Capital Gate was a big challenge for us especially concerning the geometry, construction, detailing and assembly. Advance Steel increased the productivity in engineering and in the participated departments by more than 50% due to its 3D abilities and its possibilities of a comprehensive programming".
About Waagner-Biro Stahlbau AG
Waagner-Biro is an international company for steel constructions and has its headquarters in Vienne, Austria. The company was founded in 1854. More than 1.000 employees work for Waagner-Biro in 16 offices in Europe, in South-East Asia and in the Arabic countries. Waagner-Biro is specialized in steel-glass-technology, bridge constructions, stage constructions and special mechanic engineering. Some of their main references are the cupola of the Reichstag in Berlin, the YAS-Marina Project in Abu Dhabi, the new airport terminal in Baku (Azerbaijan) and the Sony-Center in Berlin.