Lake House

Tectoniques ingénieurs and Tectoniques architectes have just submitted a preliminary design for the Maison du Lac in Montrevel en Bresse. This project is part of a vast redevelopment of the Plaine Tonique, a leisure center organized around a 95-hectare lake.
The project is led by Axe-Saône, landscape and urban planners of the operation, for CA3B Grand Bourg Agglomération with INTERRA / SPL du Bassin de Bourg en Bresse.
The project includes boat sheds and a logistics center for the leisure center. It is built of wood and bio-sourced materials and promotes short supply chains and local resources.

Short circuits and local industry

Together with ID5 engineers, we won the competition for the renovation and extension of the Saint-Romain-de-Popey slaughterhouse for the Communauté d’agglomération de l’Ouest Rhodanien.
Tectoniques and ID5 have already recently delivered the extension of the Régilait headquarters in Saône et Loire.
To allow the development of short circuits and the local meat industry, it is necessary to increase the capacity of the slaughterhouse from 3,200 to 5,200 tons per year. This change in scale is accompanied by numerous qualitative and environmental changes:
replacement of obsolete equipment with attention paid to the ergonomics of the workstations and the improvement of working conditions,
reduction of the impact of installations on global warming,
better control of wastewater discharge,
installation of equipment facilitating the good treatment of animals,
ensuring perfect food hygiene,
and transformation of the architectural image.

2040 objectives of the tertiary sector decree

Since 2021, owners of tertiary spaces must declare their energy consumption annually.
The tertiary sector decree, which has been in force since October 2019, requires a reduction in the final energy consumption (all uses combined) of tertiary sector buildings of more than 1,000m2.
40% reduction by 2030
50% reduction by 2040
60% reduction by 2050

In the immediate future, commercial actors must declare the data relating to their assets (energy consumption and reference year) before 30 September 2022 on the OPERAT platform.
Owners will then have to set up an energy saving plan with yearly monitoring.
The transformation of the CAFAL headquarters in Saint Etienne, currently being carried out by Tectoniques, anticipates this new regulatory framework.
The gain in heating needs calculated for the whole building is nearly 60%, obtained mainly by replacing the external joinery, insulating the façade with an internal lining and treating the thermal bridges on the façade posts.
A gas tri-generation solution is being studied (production of heat, cold and electricity from gas). The final energy reduction obtained in this way, all uses combined, is currently estimated at 50%, making it possible to achieve the 2040 objectives of the tertiary sector decree.

Wood + banched earth + geothermal energy

As part of a team led by Gallet architects, Tectoniques ingénieurs is carrying out the studies for the headquarters of the Pays de l’Arbresle Community of Municipalities. The bioclimatic design of the building makes it possible to envisage operation without air conditioning, which is still uncommon in the tertiary sector. The generic lack of inertia of the wooden construction is compensated for by earthen structures. The heating is distributed in a reversible floor fed by a geothermal heat pump. The latter operates all year round to heat the building in winter and cool it in hot periods in a virtuous manner, as opposed to an air-conditioning system, which uses a lot of energy.

XXL wood

The work on the ilot bois et biosourcé in Strasbourg is progressing. The main structure (posts, bracing, windchests against facades) is in glued laminated wood GL24h and GL28h. The bracing of the building is ensured by bays braced in the two axes, as well as by a facade stiffened by Résix joints between posts and windchests. At the structural assembly stage, currently underway, the size and number of these parts are quite impressive. Indeed, the building culminates at 29 meters and must respect seismic constraints. The wood macro-lot is treated by the Martin company on the basis of Charpente Concept’s studies.

New team

The Tectoniques ingénieurs team is very pleased to welcome eight new partners : Mathilde Abbes structural engineer, Lara Brayelle HVAC engineer, Louise Chretien structural engineer, Louis Giraud construction economist, Cécile Luthéreau HVAC engineer, Nathanael Soubeyran construction economist, Antoine Schaeffer electrical engineer and Naouras Nsiri in electrical engineering internship.

They enable us to extend and consolidate our skills in new constructive and environmental solutions.
Specialized in dry construction, bio-sourced and geo-sourced development, and focused on low carbon objectives, the Tectoniques group offers a multi-business platform committed to innovation, from two offices in Lyon and Bordeaux.

Gas absorption ground-source heat pump

Built in Charbonnières in the Rhône, the program is composed of two spaces: in the North the Maison des jeunes and in the South the Maison des Arts, for a total surface of 1200m².
The energy hub consists of a 52 kW condensing boiler coupled to a 41 kW gas absorption heat pump, itself associated with three vertical geothermal piles 120 metres deep.
This heat production is distributed in different circuits: AHU, floor-to-floor circuit, radiant panels and terminal units according to different water regimes.

The gas absorption geothermal heat pump solution is both the most innovative and the most environmentally efficient solution:

– The primary energy balance of gas geothermal energy achieves the best ranking compared to all the other solutions studied (condensing gas boiler, wood boiler, electric heat pump),
– The number of geothermal probes to be installed in the ground is reduced by half compared to an electric heat pump solution, resulting in a limited overall cost,
– The solution allows to do Geocooling (cooling in hot periods), by switching the heat pump. The major interest is to exploit the relative freshness of the ground at low cost (only the consumption of the 2 circulation pumps is taken into account to directly distribute the fresh water in the floor circuit).

This installation was remarkably carried out by the company BEALEM, which we salute for its professionalism.

Tectoniques recruits engineers

Tectoniques ingénieurs recruits economists, HVAC engineers, civil engineers and electrical engineers. We are looking for partners who are convinced and committed to new constructive and environmental solutions.
We are in a phase of development and renewal, with beautiful projects for the immediate future but above all strategic objectives for the near future.
We specialize in dry process solutions, wood construction, bio-sourced and geo-sourced products, and more generally, we are committed to low carbon objectives.
Tectoniques offers a multi-business platform committed to innovation.
Located on the same premises, Arborescence structures bois and eEgénie environnement complement the skills of our two companies Tectoniques ingénieurs and Tectoniques architectes.

Send CV to Robert and Mayeul

A first in France for recycled aluminium

Technal and its manufacturer-installer SMMM have achieved a first in France with joinery made of recycled aluminium CIRCAL 75R.
Their post-consumer recycled content, equal to or higher than 75%, i.e. an average of 2.0 kg of CO2e/kg of aluminium, thus contributes to obtaining the Mediterranean Sustainable Building Gold (MDB) label.
They cover four public facilities in the Gavotte district of Les Pennes-Mirabeau, north of Marseille, built by the Tectoniques group: a 3,000 m2 media library, an intergenerational restaurant for 500 people, a school group with 15 classes and a children’s centre with a crèche and a Maternity Care Centre.


Tectoniques is currently working on a project for a school group heated and cooled in thalassothermics. Named Massileo and operated by Dalkia, the thalassothermal plant uses the Mediterranean Sea as a sustainable energy source to supply heat and cooling to the Euromed 2 urban project, an area of nearly 500,000 m2 in Marseille.
The plant emits 80% less C02 than a conventional installation.

Mixed wood-concrete facade

The FMB facade consists of a load-bearing timber frame and a concrete outer skin. It is mechanically assembled using SSB connectors.
This process was developed by ICM structure and AIA studio bois.
We are going to implement an equivalent process on the housing operation on Grand Coeur in Nancy. The consultation file of the companies is in progress. This experience completes our previous wood-concrete facade operation carried out in Vaulx-en-Velin for the social landlord RSH. We had used the Farjot construction process, which is a more structurally interwoven device between wood and concrete. The FMB façade, on the other hand, provides a clearer interface between wood and concrete and is more in line with our current expectations. To be followed shortly on the construction site.