Wooden construction in a large ephemeral palace

This is the tenth edition “International Forum for Wood Construction” (FIBC) and the sector decided to do in a symbolic. The profession invests Great ephemeral palace, this structure built entirely in a wooden frame at the Champ de Mars, at the foot of the Eiffel Tower, which will host many events (including the 2024 Olympics) until the end of the planned renovation of the Grand Palais the same year. It will then be disassembled to find another use elsewhere.

The general public is invited to visit the building on July 17, 2021 and occasionally learn about the virtues of wooden construction. This project is truly a synthesis of the benefits that will be built in this material. Built mostly in a workshop, the building was erected in less than eight months thanks to its simplicity of execution. “I was amazed at the ease, speed and efficiency with which this structure, similar in size to the internal volume of the Grand Palais, was assembled. “ marvels at the architect Jean-Michel Wilmotte who designed the building. There is no water consumption on site, a simple portal assembly drawing a cross 51 meters wide for the main wing, 33 meters for the secondary wing, for a total building height of 20 meters so as not to overshadow 36 meters from the neighboring Military School.

Wood is officially recognized as an instrument in the fight against climate change

From July 15 to 17, FIBC holds congresses in an optimistic atmosphere. The tree is growing. Long neglected and pushed into mountain huts, the material is returning thanks to the fight against climate change. “This event has a main message, says Nicole Valkyser-Bergmann, event organizer. Wood construction is good for the climate, good for the forest and good for the habitat and the inhabitants“Professionals will discuss best practices in construction, but also in the production and delivery of materials.

There are still questions about its availability. If France has a large and growing deciduous forest (oaks, beeches), it lacks coniferous trees (pines, spruces, firs). They also have to deal with a “silent storm” as forest managers call it, the destruction of trees by insects, bark beetles. Another seriously topical issue: the current soaring log prices, driven by Chinese demand and the economic recovery in the United States, where a lot of wood is being built.

Regulations are pushing to leave more and more wood on the construction market

Because if wood is an exotic material in France, it is far from the case in many regions of the world: North America, Scandinavia, Russia, China. “In France, wood represents 10% of buildings, recalls Paul Jarquin, president of FI-Bois France and co-organizer of the event. Therefore, our room for improvement is huge and only for the Ile-de-France region we plan to move from 4% of wooden buildings to 17% in 2030.And this optimism stands for: RE 2020 Published in December 2020, this “environmental regulation” puts the construction sector within the framework of the fight against climate change. Effective until 2030, it introduces life cycle analysis of construction materials. Big step. “Over a 50-year lifetime, greenhouse gas emissions are evenly divided between the construction phase and the annual energy consumption for heating and air conditioning.“, recalls Yann Dervyn, director of the collective Effinergie which brings together actors of frugal construction. And wood has a great advantage. According to calculations Environmental Transition Agency (formerly Ademe), the construction of a family home now emits 425 kilograms of CO2 per m². That’s 144 pounds for a house in a wooden frame because CO2 has been trapped in the building for at least half a century.

This is the message that the profession wants to convey to the general public. With a number of obligations, such as compensating the log for removing trees from the French forest or recycling materials at the end of its life. Thus, the tables for various stands were made from 1,200 doors of the abandoned Saint-Vincent-de-Paul Hospital in Paris. Between exhibitions (especially the Notre-Dame de Paris frame model), presentations of major wooden building projects and an architecture awards ceremony, the event also includes at 18:00 and 19:00 two major citizen debates on the circular economy and on the “interpellation” youth of the French forest-timber sector.

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