PROGRAM
The program is located in a sensitive and derelict sixties
suburb in Charleville-Mézières and includes the following sport
activities :
- roller-inline-hockey
- futsal (indoor soccer)
- hip-hop dance
- climbing
- other sport and cultural activities
- skate park
The building is to be used by the young population of
the neighbourhood and managed by them together with neighbouring associations.
The project is described as “structuring” by city
authorities as it
is a keystone in the process of social renewal of the neighbourhood.
The budget was quite modest with a target at 900€/m²
exclusive of taxes and the project has to be looked at within this strong
economic constraints.
DESIGN PROCESS
The design process has been conducted by the architects together with a
team of structural and HVAC engineers and acoustics and cost calculation
consultants. Engineers and consultants have been involved in early phases of a
largely open design process to search for most efficient solutions.
The project has been developed with a strong involvement of sports and
neighbourhood associations.
The open design process allowed an optimized adjustment of the initial
program set by the client to best achieve user’s requirements, environmental
issues, cost constraints and architectural quality.
This participative approach during the whole design process
ensured a good appropriation of the project by all parties involved.
MAIN PRINCIPLES
The building is located at the crossing of two pedestrian walkways.
The building
is organized in 3 main parts :
- a large hall for practice of roller-inline-hockey,
futsall, handball with tribune for 180 people
- a small hall for practice of climbing, hip-hop dance
and other activities
- service rooms connecting the two halls with entrance
area, restrooms, changing rooms, meeting rooms, storage, etc…
it is to be
noted that the smaller hall was not originally included in the program and
results of discussions with future users, of a urban approach (creating an
acoustic screen protecting surrounding housings).
The outer
aspect of the building consist in a 3,15 m high around the whole building. The
higher part of the volume is made of mirror stainless steel in order to
“dematerialize” the mass of the building to reduce its massive effect within an
essentially residential environment. The irregular aspect reflecting
surrounding landscape and sky, the stainless steel cladding lightens the mass
of the building contrasting with the massive base. The northern façade is made
of reinforced glass profiles to provide most of natural light in the halls. The
volume of the small hall is designed as an emerging mass composed with abstract
patterns. The base is painted with different shaded of grey in order to be able
to simply add a new strip of grey in case of graffiti. The abstraction of
masses and patterns aim at creating an abstraction, rather create a landscape
than a building.
The structure
of the main hall is made of steel, best solution as it allows minimum height of
structure, and therefore lowers the whole building to respect views from
surrounding housings. The pillars are W shaped made of circular tubes and using
a minimum floor depth and therefore reducing floor area (and costs) and giving
a strong character to the space. Tribunes are made of rough wood, where only seating
board is surfaced. The structure of service areas is made of rough massive wood
beams as distances are short. Visible from below, if gives a warm and rough
atmosphere to the spaces.
ENVIRONMENTAL ISSUES
The project is designed according to French Label HQE (Haute Qualité
Environnementale) that aims at ensuring environmental quality both for users
inside the building (health and comfort) and for the surrounding environment
(construction, energy, management).
For the project, energy consumption is considered to be cut by ¾
compared to a reference building. The main issue was the decision not to heat
the main hall reducing considerably energy consumption of the whole
complex. This was agreed together with
future users. Only the area for seating public is heated with radiant natural
gas burners providing a reduced comfort area for those being static. Cost
savings generated by this solution have been used to build and earth cooling
tubes system that preheats incoming air in the winter preventing frost in the
building. Cost savings have also been used to implement solar panels for
production of warm water. This economic strategy made it also possible to
design the project in two buildings The smaller room is highly insulated and
besides dance and climbing, it is also open for multipurpose activities not
originally included in the program.
All heated areas are built with excavated brick blocks know for their
embodied environmental quality and outstanding insulating quality without
adding any extra insulating material. It is also providing excellent thermal
curve for summer comfort. Earth cooling tubes also contribute to cool the
building naturally in the summer. It was given a great deal of attention to
naturally light quantity and quality by running detailed computer modelling of
all spaces. It results an autonomy in natural light over 80% for the whole
building. The large northern facade made of reinforced glass profiles provides
constant light complemented with two skylights that open in summer for natural
crossing ventilation and overheat exhaust. Contrasts have been also optimized
to be less than 0,3.
An acoustic consultant has been involved in the project to both ensure
the low impact of the building activities on the neighbourhood and acoustic
indoor quality for the comfort of users.