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  • Montpellier
  • France
  • Architect:
    A+ architure
  • 2006 - 2008
  • Client:
    Enjoy Montpellier
  • Façade & Roofing Installer:
    Soprema Entreprises
  • Photographer :
    ArcelorMittal Construction France


  Muralys coating

Montpellier Arena

A giant parallelepiped enveloped in bright colours and conceived according to the most modern requirements of a multi-purpose building: The Montpellier Arena is characterised architecturally by formal simplicity and a spectacular colourful façade. Both cladding and roofing solutions were supplied and co-developed by Arval by ArcelorMittal Construction France.

The new multi-purpose event centre is situated in Montpellier’s exhibition park and boasts with its flexibility: it can be used as a theatre, sports hall, exhibition and congress centre, for concerts etc. As a theatre, it offers seats for 14.800 people, for sport events 9800 spectators can be seated, and for exhibitions a total surface of 13 500m2 can be offered. With these dimensions it is the 2nd biggest Arena in France, just after the Salle Omnisport in Paris-Bercy.

The building and its characteristic design don’t leave one indifferent. On the contrary, it has a strong emotional impact and might be perceived as aggressive or even violent. A feeling, that is evoked by the materials employed as well as its colours: purple is a recurring element outside and inside the building. The use of gold in some parts provides warmth and takes the edge off this violence.

The Arena is based on a rectangular structure complying with the requirements of the client ENJOY Montpellier, who commissioned a simple and practical building that can be used quickly. The surprising element of the building is the inclined front façade that rises out of the glazed entrance hall forming a canopy.

One of the biggest challenges was the short construction period: not even 2 years were planned for the construction of this Arena. After ground breaking in the beginning of 2009, the building had to be ready only 21 months later, in September 2010, for a show hosted by ENJOY Montpellier. 

The tight time schedule demanded efficient and economic construction methods, and above all a close collaboration and exceptional involvement of all partners. Façade and roof could be finished according to schedule thanks to the excellent and professional collaboration of the Arval by ArcelorMittal team and the contractor.

The front façade – a giant amethyst
The inclined, purple front façade is made of 2 588 siding panels ST supplied by Arval  by ArcelorMittal coated with the newly developed Muralys technology: a total of 200 macro-photographs of two 50kg amethyst geodes imported from Brazil were printed onto the steel panels, without any loss of definition.

These pictures cover the 4200 m2 of the canopy and provide the building with the characteristic purple colour.

The concept and layout of the siding panels has taken into account the possible constraints originating in production technology, installation and architectural design.

The photo was divided into 22 working files, which again were converted into 444 print files to develop the layout plan. Then the 2 588 steel elements were numbered according to this plan and installed on the metal frame.

The façades on the sides are based on Arval’s GlobalWall CIN 327 that was modified and adapted to the requirements of this project: The inner skin consists of perforated Supportwall 400.90 P panels, a layer of acoustic insulation, a metal frame of  45º inclined Z-profiles, 2 layers of thermal insulation, undulating Nergal steel profiles and a 20 mm counter frame forming cavity.

The outer skin is also made up of ST siding panels, but a special effect is created due to their different sizes and colours: 3 different panel lengths, 3 different widths, 7 colours and 2 thicknesses convert the Southwest and Northeast façades into a spectacular visual highlight: the uneven surface composed by the 126 different siding panels create shades and light reflections.

For this design A+ architecture was inspired by a local fish, a certain type of bream: the differently shaped and coloured panels resemble its scales.

Solar Roofing 
For the 19.000 m2 roof a complex photovoltaic solution was employed. The solar cells are installed on the GlobalRoof system which was – like GlobalWall - tailor-made for this project. The inner surface consists of perforated Hacierba trays with thermo-acoustic insulation, then Hacierco decking sheets, covered by two layers of rigid thermal insulation. The roof is sealed with an integrated photovoltaic bitumen waterproofing solution on which 3 128 photovoltaic cells on 280 crystalline panels are installed, producing up to 519 kWh.

Privacy & Sun protection
A rounded volume stands out from one of the side façades, just between the glazed reception and the changing rooms. ArcelorMittal Construction France developed a specific solution for the cladding of this part in order to meet the requirements: sun and visual protection from the outside without limiting the views from the inside.

Therefore, large vertically installed blinds made of perforated trapezoidal steel sheets (Trapeza 8-125-25 B, 1mm ) were employed. In line with the building’s colour concept and in order to achieve a better protection of the steel, these sheets were pre-coated 60µ in Gold 6995 on both sides.

As for the perforation, Type R8 T12 proved to be the perfect solution: consisting in a 8mm diametre hole, with another hole just 12 mm from the centre of the first one, leaving 40% of the cladding transparent.

Text: Constructalia & ArcelorMittal Construction France

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