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| PUU-BO SYSTEM PER E2 ECOLOGY + ECONOMY
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28 marzo 2011
 BIG (DK) + Pirmin Jung Engineers per le strutture in legno (CH) + AOA Anttinen Oiva Architects Ltd (FI) + Vahanen Engineers (FI) + Stora Enso (FI) compongono il team vincitore del concorso di progettazione per la realizzazione di un prototipo in legno concepito come un sistema costruttivo per la realizzazione di un progetto pilota a Kouvola, Finlandia, che diventerà una vetrina per mostrare a tutto il mondo le possibilità offerte dall'uso del legno nelle costruzioni ecosostenibili.
Per soddisfare i requisiti ambientali sempre più rigidi che sono richiesti in Finlandia per le costruzioni su larga scala, il concorso per lo sviluppo della E2 Ecology + Economy mira a trovare un progetto che rappresenti una soluzione concettuale alla produzione in serie di edifici in legno a più piani. L'intervento a Kouvola, 15.000 metri quadri di abitazioni prefabbricate in legno, sarà un esempio che dimostrerà come possono essere costruite case ad alta efficienza energetica, adattando di volta in volta il modello proposto alla localizzazione. PUU-BO, la proposta di BIG, è stato annunciato come uno dei due vincitori del concorso a due fasi, per il quale erano stati invitati 26 studi internazionali.
 La giuria di E2 (Ecology + Economy) si è così espressa: "PUU-BO è stata l'unica proposta che ha centrato l'obiettivo del concorso E2: considerare gli spazi fra gli edifici e quelli intorno ad essi come potenzialità per uno sviluppo ambientale verde".
Wood as construction material brings a double benefit: remarkably reduced emissions in its production and fabrication and improved energy efficiency of the buildings where it is used. Currently, only a fragment of multi-story buildings utilize timber construction in Finland, a country known for its timber production. BIG’s PUU-BO is a comprehensive prefab solution designed to be both extremely flexible and materially efficient. PUU-BO’s conception as a system based on best practices and not predefined standard elements, gives it an embodied intelligence and ensures its viability for the future. The system’s easy adaptability to a variety of building typologies and uses, opens up new possibilities for prefabricated wood systems beyond the residential market - the very same elements in the residential pilot project could be used in an office building or even a wood skyscraper with no loss in material efficiency.
 “BIG’s point of direction was to design an innovative system that can fit any built environment for any type of use. Rather than developing a system based on current market demands, we wanted to make a system so flexible it can embrace as many building typologies and functionalities as possible. Instead of making the most carbon neutral system at present; we develop a system that evolves into the future. This way the system respects the ever increasing key drivers for sustainability while being competitive with other building systems”, Thomas Christoffersen, Partner-in-Charge, BIG.
A site with generous views towards public green areas and the city’s river has been specifically selected for this pilot project by the city of Kouvola. The location allows the volume of the proposed building to push from one side to the other side to integrate the park and parking along the development. BIG’s proposal follows the contours of the landscape creating semi-private pockets directly connected to the park while the height of the building is manipulated to peak towards the open areas. The pockets are surrounded by lower housing creating an intimate space where all units are connected to the ground. The areas with the best views have the most floors and the most apartments while all roofs are partially accessed by the penthouse apartments and all units at ground floor have access to private gardens to both sides.
 “Le Corbusier’s DOMI-NO system was developed to industrialize construction with the new technologies of concrete structures, and improve living conditions for the many. Decades later concrete housing has become synonymous with boxy and boring. By crossbreeding state of the art building technology and wood construction PUU-BO provides endless variability with infinite renewability” Bjarke Ingels, Founder and Partner, BIG.
BIG’s E2 proposal combines a variety of housing typologies – from 8-story apartment buildings to low townhouses with a shared courtyard space. Along both sides of the building a pedestrian path connects the private gardens to parking and park. The path blends with the existing network, integrating the building with the park, river and city. Playgrounds, sports fields, and a community sauna in the river are strategically placed in order to activate the site. All activities are available to both the PUU-BO inhabitants as well as the citizens of Kouvola.
 About E2
The city of Kouvola in cooperation with the Finnish Forest Industries association, the Finnish Forest Foundation, the Finnish Funding Agency for Technology and Innovation, the Finnish Innovation Fund SITRA, KSS-Energia Oy and the Regional Council of Kymenlaakso aims at fostering new solutions for industrial production of wooden multi-story buildings through the launch of E2 Timber Development Competition and a future Centre of Competence in Timber Construction, “Wood-Inno”. The concept competition is expected to offer energy efficient solutions which reduce the carbon foot print, and could help Finland to take leadership in the field of timber construction worldwide.
About BIG
BIG, founded in 2005 by Bjarke Ingels, is an architectural office currently involved in a large number of projects throughout Europe, Asia and North America. Based in Copenhagen, Denmark and with a newly opened office in New York, USA the office is led by six Design Partners, including Bjarke Ingels, Andreas Klok Pedersen, Finn Norkjaer, Thomas Christoffersen, Jakob Lange, David Zahle and two Management Associate Partners, Sheela Maini Sogaard and Kai-Uwe Bergmann. BIG’s architecture emerges out of a careful analysis of how contemporary life constantly evolves and changes, not least due to the influence of multicultural exchange, global economic flows and communication technologies that together require new ways of architectural and urban organization.
About Pirmin Jung
PIRMIN JUNG Ingenieure für Holzbau AG is a leading engineering specialist for multiple-storey timber constructions. For the past 15 years, Pirmin has worked closely with designers and architects, creating efficient sustainable and long-lasting wooden solutions worldwide.
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