Architectural Engineering: ABT Adviesbureau voor Bouwtechniek, Velp,
Structural Engineering: Van de Laar bv, Advies- en ingenieursbureau voor bouwconstructies, Eindhoven
Building Physics: DGMR Raadgevend Ingenieurs, Arnhem
Building Services: Ingenieursburo Linssen, Amsterdam
Artist Collaboration: Catalogtree, Arnhem
General Contractor: Bouwbedrijf Wessels Rijssen, Rijssen
Client: City of Arnhem Stadhuisplein 1 3811 LM Arnhem, the Netherlands
Building Costs: €31 mio building and construction costs including interior and immediate surrounding area.
From the architect. ROZET, Arnhem
Rozet is the new address for various cultural and educational institutions in Arnhem. The mixture of Library, Heritage Centre, Art Centre and Community College gives rise to one of the most important public buildings in the city.
A LINK BETWEEN DOWNTOWN AND POST-WAR EXPANSION
In volume and articulation Rozet forms the architectonic transition between the historic and the post-war city tissue of Arnhem. The building lies at the conjunction of the Station Area and the Kerkplein (Church square), which is the central route in the urban planning for the Rijnboog quarter in Arnhem. Rozet, with its cultural and educational program, provides an anchor point on this public route and a catalyst for future urban development.
THE INTERIOR STREET AS AN EXTENSION OF THE URBAN ROUTE
Rozet has been designed as an urban elongation of the central route between the Station Area and the Church square. The core of Rozet is formed as a glazed interior route which intersects the building on all floors. A lingering public gallery with a sequence of attractive squares which function as entrances for the various institutions and reflect the synergy between them.
Occasionally the interior street takes the shape of an exhibition hall or foyer, at other times it functions as an auditorium or an ascending reading room with study sites. The visibility of this interior street from outside as well as the apparent programming on the inside of the building in the showcase windows, led displays, book cases and illuminated billboards strengthen the public identity of the building on both street and city level.
FACADE & IDENTITY
The facade of Rozet is aimed at expressing public identity. It is built out of sandy, vertical concrete elements, that display the building as a whole to the city. The elements feature reliefs and rosettes, giving the facade texture and the building meaning in its public supply by their analogy with knowledge. On the one hand the vertical blinds function as a fixed screen, on the other hand they allow the sunlight to enter deep into the building through high vertical windows.
A SUSTAINABLE BUILDING
A combination of choices make Rozet into a sustainable building. The interior street operates as a climate neutral vent based on natural ventilation. The roof is entirely green. It is a combination of vegetation and a water buffer which contributes to the air-condition of the building. Birds and insects benefit from this green oasis in an urban setting. The roof accomodates furthermore solar panels which make a substantial contribution to energy requirements of the building. Lastly the thermal storage confirms Rozet to be one of the most sustainable buildings in Arnhem.
<img src="http://static.dezeen.com/uploads/2014/04/Casa-Cien-by-Pezo-von-Ellrichshausen_dezeen_1sq.jpg" />
Architect duo Mauricio Pezo and Sofia von Ellrichshausen built this seven-storey <a title="Concrete archive on Dezeen" href="http://www.dezeen.com/tag/concrete/">concrete</a> tower in the Chilean countryside to house their own living quarters as well as a studio for their firm (photos by <a title="Cristobal Palma archive on Dezeen" href="http://www.dezeen.com/tag/Cristobal-Palma/">Cristobal Palma</a> + movie). <a href="http://www.dezeen.com/2014/04/26/casa-cien-concrete-house-chile-pezo-von-ellrichshausen/" class="more-link">(more...)</a>
Contractor: Wates Construction
Cost Consultant: Davis Langdon
Landscape Architect: Grontmij
Acoustic Engineer: AEC
From the architect. Design
The contemporary five-storey building is designed around a central atrium which brings in natural light, connects spaces together, and provides passive ventilation. The highly efficient plan increases the net-to-gross floor area to 86%. Adaptability of space is fundamental, ensuring easy modification to suit future generations’ working practices.
The ground floor of the building provides public service facilities, including the One-Stop-Shop, plus support facilities for the building, whilst upper floors provide office space for staff. The One-Stop-Shop and Council Chamber are located at the front of the building, overlooking the new square and allowing passers-by to observe democracy in action.
Office floor plates have been designed to incorporate an open plan formation which facilitates flexible sub-division of office space, allowing for open plan desk arrangements, maximising the usable life of the building and reducing the overall running costs for the Council. The use of quality building materials was a necessity, whilst promoting sustainability and low-energy principles.
The council chamber façade is clad with an abstract pattern of coloured, glazed terracotta baguettes. Nearly 3,200 tiles in 12 different colours have been installed, creating a focal point and a unique identity. Terracotta’s longevity and sustainability make it an ideal choice for the building, manufactured from natural robust materials, it is low maintenance and extremely weatherproof.
A high-quality concrete structural frame has been left exposed inside the building, providing thermal mass, fire and acoustic benefits to the scheme. The finish avoids the need to plasterboard, saving on even more costs. Timber panelling has been used to create a warm visual contrast to the concrete and also acts as an acoustic absorber soaking up any noise generated in the atrium.
The scheme takes a holistic view of sustainable design, integrating environmental, structural and architectural elements to create a low energy solution, achieving a BREEAM Excellent rating.
Passive, rather than active measures have been utilized to ensure lower running costs and significantly less maintenance. It is expected that these measures will achieve huge savings for the council. The central atrium maximises natural ventilation throughout the building, significantly reducing air handling. Via the elevations, the atrium also maximises natural daylight, reducing the need for artificial lighting.
The use of a green roof enables sustainable drainage and provides a natural habitat for wildlife. Rainwater harvesting will enable the re-use of any unabsorbed water for WC flushing. A selection of materials were chosen from the BRE Green Guide, minimising environmental impact.
Value for Money
Staircases, M&E plant and vertical service risers were prefabricated offsite and craned into place, reducing the overall cost and programme time, whilst improving the quality of these components.
With construction costs within budget, the new civic offices are without doubt a ‘model of modesty’, maintaining the highest quality finishes whilst ensuring that the Council’s operational costs remain streamlined beyond project completion.
<img src="http://static.dezeen.com/uploads/2014/04/Urban-Hive-by-Masil_dezeen_2sq.jpg" />
Hundreds of circular apertures perforate the reinforced <a title="Concrete archive on Dezeen" href="http://www.dezeen.com/tag/concrete/">concrete</a> walls of this office <a title="Towers archive on Dezeen" href="http://www.dezeen.com/tag/towers/">tower</a> in <a title="Seoul archive on Dezeen" href="http://www.dezeen.com/tag/seoul/">Seoul</a> by Korean studio Archium, designed to recreate the structural strength of honeycomb (+ slideshow). <a href="http://www.dezeen.com/2014/04/24/archium-urban-hive-office-tower-seoul/" class="more-link">(more...)</a>
<img src="http://static.dezeen.com/uploads/2014/04/Bare-concrete-apartment-by-Airhouse-Design-Office-presents-its-own-fashion-exhibitions_dezeen_50sq.jpg" />
Raw <a title="Concrete archive on Dezeen" href="http://www.dezeen.com/tag/concrete/">concrete</a> surfaces dominate inside this stark <a title="Apartments archive on Dezeen" href="http://www.dezeen.com/tag/apartments/">apartment</a> in Nagoya, <a title="Japan archive on Dezeen" href="http://www.dezeen.com/tag/Japan/">Japan</a>, that Japanese studio Airhouse Design Office has renovated for a fashion lover (+ slideshow). <a href="http://www.dezeen.com/2014/04/24/house-in-jiyugaoka-concrete-apartment-airhouse-design-office/" class="more-link">(more...)</a>
Curving concrete walls frame secluded meeting rooms along the central thoroughfare of this architecture faculty building at Bond University in Queensland, Australia, by Peter Cook's architecture firm CRAB Studio (+ slideshow). (more...)
Buzzi e Buzzi - P. House, Tenga 2000. Located on a steep site, the roof is level with the street above, with parking and the main entry located off the roof. A personal favorite. Photos (C) Margherita Spiluttini.
<img src="http://static.dezeen.com/uploads/2014/04/Water-treatment-facility-by-Skylab-Architecture-features-a-roof-of-grass-covered-fins_dezeen_2sq.jpg" />
Seven <a title="Concrete archive on Dezeen" href="http://www.dezeen.com/tag/concrete">concrete</a> fins provide a <a title="Green roofs archive on Dezeen" href="http://www.dezeen.com/tag/green-roofs/">green roof</a> that collects rainwater at this new engineering facility for a wastewater treatment plant in Portland, Oregon, by local firm Skylab Architecture (+ slideshow). <a href="http://www.dezeen.com/2014/04/15/wastewater-treatment-plant-skylab-architecture-portland-oregon/" class="more-link">(more...)</a>