A new timber construction method is expanding design possibilities for lightweight, curved structures. Austrian start-up Beyond Bending, a spin-off from TU Wien, developed the patented FLEXGrid system. It allows flat, two-dimensional wooden grids to transform into complex three-dimensional forms—without formwork or scaffolding.

From Flat Grids to Spatial Structures

The FLEXGrid system relies on a simple but powerful idea. Designers assemble a flat grid of timber lamellae in two dimensions. When they apply tension, the structure bends into its final curved shape. Unlike conventional grids with parallel elements, this system uses non-parallel lamellae. As a result, the structure naturally moves into the third dimension when expanded.

Advanced mathematical modelling makes this possible. The system uses geodesics, which describe the shortest path between two points on a curved surface. Designers use these paths to calculate a flat grid that transforms into a precise 3D geometry.

Material Efficiency and Circular Design

The FLEXGrid Pavilion at the Kuchl Knowledge Campus in Salzburg demonstrates the system at architectural scale. The pavilion spans around ten metres and reaches four metres in height. It shows how digital design and efficient material use can work together.

The structure uses multilayered, finger-jointed fir lamellae. These elements allow tight bending while maintaining strength. The team designed the support benches from stress-free glued wood. Screw foundations make the pavilion fully demountable. A textile membrane provides weather protection with minimal material use.

This approach supports circular design principles. The pavilion uses renewable, locally sourced timber and avoids permanent connections. The design reduces waste and simplifies construction. It also enables reuse and relocation.

Applications for Architecture and Design

The FLEXGrid system offers potential beyond experimental pavilions. Architects and designers can use it for temporary structures, exhibition spaces, and adaptive environments. Its flat-pack logic simplifies transport and assembly.

The modular system also allows for scaling. Designers could apply it to larger roofs, façades, or lightweight enclosures. By combining computational design with renewable materials, FLEXGrid presents a resource-efficient alternative to conventional construction.

As digital tools continue to influence architecture, systems like FLEXGrid show how material innovation can support more sustainable and expressive design solutions.

Source & photos: Beyond Bending / TU Wien