Lattenbalken

Lattenbalken are a type of wooden beam used in traditional timber construction, formed by assembling multiple thin wooden slats (latten) side by side to create a single longitudinal structural member. The concept relies on the sum of many slender components to achieve stiffness and load transfer, while keeping the overall beam lighter than a solid timber member of the same length.

Construction and design typically involve arranging the slats with their grain running along the length of the beam and fastening them together with nails, screws, or other connectors. The resulting built-up section can be solid or may include a core or additional layers to adjust stiffness and load capacity. Lattenbalken are commonly used where a lighter, yet sufficiently strong beam is advantageous, and they may be employed in floors, ceilings, walls, or roof substructures, especially in traditional or historical timber-frame construction.

In use, lattenbalken often serve as supporting elements for plaster, plasterboard, or other wall and ceiling coverings, bridging spans between more substantial framing members. They can also appear in furniture or decorative construction where a lightweight beam is desirable.

Materials are usually softwoods such as spruce, pine, or fir, though hardwoods may be used for higher strength requirements. Because they consist of multiple pieces, lattenbalken can be more susceptible to warping or moisture-related issues if not properly dried, treated, or protected in exposed or outdoor environments.

Lattenbalken are part of the broader family of built-up timber members and are related to other light-frame and lath-based construction techniques found in European carpentry.