Atelier GABU Hand-Builds Timber Observation Tower in Vaudémont

Atelier GABU erected Brunebasse, a temporary observation tower assembled entirely by hand and without mechanical tools, on a hillside in Vaudémont, northeastern France. The studio designed and built the structure for the 2021 edition of L'Écho du Marteau, a festival dedicated to architectural experimentation.

The siting is the project's sharpest move. Brunebasse stands directly opposite the heavy stone remains of Brunehaut, a medieval ruined keep. Where the monument embodies defensive masonry and mass, the new installation answers with a light, permeable structural timber grid that prioritizes panoramic visibility over interior enclosure. The tower works as a formal counterpoint to its historic neighbor rather than a replication of its tectonic language — the difference between a wall that blocks and a frame that admits.

How Did the Studio Build Without Machines?

Atelier GABU's architects hand-assembled the elevated timber viewing platform, framing the project as a case study in material economy and low-impact fabrication. Slender dimensional lumber forms the open tectonic frame. The members join through direct mechanical connections, with no power tools involved at any stage of assembly.

For practitioners, the build method matters as much as the form. The project demonstrates that a load-bearing elevated platform can rise from standard timber sections, hand joints and human labor alone, which lowers the equipment threshold for comparable temporary structures and festival commissions.

What Does the Textile Veil Do?

Sections of the exterior envelope carry a semi-transparent textile veil. The fabric filters natural light while keeping visual transparency toward the adjacent fields and tree canopy, so visitors on the interior deck retain a clear view of the surrounding landscape.

The veil also performs over the course of the day. As the sun shifts, it projects the diagonal bracing members as geometric shadow patterns onto the fabric scrim, rendering the structural logic legible from both the interior deck and the exterior landscape. The bracing does double duty: it stabilizes the frame and draws the elevation, with daylight acting as the drafting instrument.

What Changes for Temporary Architecture?

Brunebasse condenses an argument that festival pavilions increasingly carry: that hand assembly, dimensional lumber and a single membrane can produce an elevated public viewpoint with minimal mechanical input. Positioned against a medieval keep, the tower also shows how lightweight construction can hold its own in dialogue with monumental masonry without borrowing its mass.

Project information:

• Name: Brunebasse
• Architect: Atelier GABU (@atelier.gabu)
• Location: Vaudémont, France
• Event: Festival L'Écho du Marteau

The installation remains a reference point for low-impact fabrication, and its documentation shows how a hand-built timber grid and a translucent textile can together frame a protected French landscape.