The GridShell structural system developed by Quaternion is similar to a flexible elastic shell consisting of 2 wooden cross slats forming a mesh. Initially mounted flat on the floor, the structure is modeled when lifting to adopt a desired shape that can be very varied. It then frozen in its shape by blocking the slats. Grishell structures are currently used in short-lived event applications. The gerboise project aims to extend its use to longer periods by removing the following main scientific and technical locks: the design of an assembly between slats allowing slipping and ensuring effective maintenance of the required shape, the justification of a level of structural safety required by European regulations and the implementation of an efficient lifting system. Digital tools for form research, structural modeling and simulations integrating uncertainties are at the heart of the project. Combined with essential real tests, they will be used to define the structure and to justify by calculating the expected safety constraints. Associated with Quaternion, Terrell brings its knowledge in standardisation and expertise in structural design, while LMDC brings its experimental expertise and know-how in probabilistic approaches. The 3 partners join their digital expertise.