and a height of 25 metres. The house is just the beginning - it will one day be the centrepiece of the „Timber Town of the Future“.
Project description
The 8-storey building in Bad Aibling is an architectural milesto-ne. The project is a collaboration between residential housing provider B&O, architecture firm Schankula, timber construction company Huber & Sohn and binderholz as the supplier of cross laminated timber BBS elements.„We wanted show what wood can do“, says architect Arthur Schankula. B&O‘s mid-term target is to construct a „zero energy town“ in Bad Aibling, upper Bavaria. The University of Rosen-heim was appointed to cooperate in the creation of a model of „energy efficiency“ at an urban development level.
The project is supported by the federal ministry for economy and technology within the „eneff:stadt“ research initiative and is founded on four guiding principles:
| Sustainable, co2-free energy supply, decentralized and self-sufficient
| Innovative, low-energy timber construction | Living and working in the same location
| Varying standards of modernisation as examples of housing industry requirements
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Architecture SCHANKULA-Architekten Diplomingenieure www.schankula.com Building owner B&O Gruppe www.bo-wohnungswirtschaft.de General ContractorHuber & Sohn GmbH & Co. KG www.huber-sohn.de Execution 2011
Site plan
Photo: Schankula-Architekten 8-storeytimber building 03 www.binderholz-bausysteme.comPhoto:
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Floor plans
Office, ground floor and 1st floor barrier-free living, 6th floor
1 2 3 4 5 6 7 8 9 10 12 11 13 14 15 Photo: Schankula-Architekten 8-storeytimber building 05 www.binderholz.com
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gree of prefabrication which included the stairwell, balconies and building management facilities.
The components for walls, ceilings and roof were prefabrica-ted, delivered to the building site and assembled on site. The structure comprises 750 m3 of spruce wood. Huber & Sohn‘s assemblers completed a storey every two days with just four to six workers on site - an astounding achievement for a project of this scale.
Sophisticated drilling
Special dual-axis, angular holes were drilled into the binderholz CLT BBS elements at the binderholz plant. All of the screw con-nections had to be considered and prefabricated in advance. There is virtually no settling of the 8-storey building thanks to a special solution combining the BBS ceilings and concrete. The building‘s entire support structure - i.e. walls and ceilings - is made of wood. Only the stairwell core was cast in concrete. All of the BBS ceilings - some of which are made of high-grade wood for visible areas - were supplied by binderholz. The top storey (= penthouse) is designed entirely in binderholz CLT BBS and consists mainly of high-grade timber. It is an impressive demonstration of the fact that fire protection in timber const-ructions has nothing to do with the flammability of the building material.
Building with wood means achieving virtually passive house standards at a normal price. The building‘s energy household is supported by two wind power plants; it has a heating energy requirement of 18 kWh/m² and is therefore close to the passive house standard.
Energy
Penthouse, 7th floorPhoto:
During this pilot project the architect and building owner also cooperated with the Technical University of Munich and the en-gineering company belonging to Professor Stefan Winter. This cooperation deepened the competence in the following areas: | Constructive fire protection solutions in multi-storey timber construction
| Type certifications
| Integration variants for building management facilities | Fulfilment of raised noise protection requirements in accordance with Vdi 4100
| Construction process optimisation
The floor plans for the eight 165 m² storeys have not yet been defined. Ernst Böhm, the boss at B&O, envisages a „mixture of working and living environment“. The future residents will decide on the layout of the rooms. Interchangeable, non-load-bearing elements enable floor plans to be changed within a single day at a later date.
The timber house will soon have neighbours. B&O has acquired the entire plot of land in Bad Aibling. Böhm wants to build a „zero energy town“, the „timber town of the future“. One day, 400 people will live and work there, with energy from regenerative sources.
Construction work began on 16 May after the completion of the stairwell core. The waterproofing on the flat roof was installed on 10 June. The building was therefore completed in less than four weeks. Construction time would have been even shorter had there not been a public holiday and extended weekend on 2 June.
The project impressively demonstrates that binderholz CLT BBS offers the same advantages for tall buildings and is a worthy re-placement for concrete, steel and brick. The building will contri-bute towards helping establish timber as a construction material for multi-storey residential buildings in urban areas.
System optimisation
in timber construction
8-storeytimber building 07
Binderholz Bausysteme GmbH
A-5400 Hallein/Salzburg · fon +43 6245 70500-0 · fax +43 6245 70500-127 [email protected] · www.binderholz.com