Tongue and groove joints are used in timber construction for aligning, stabilizing, and fire-protective sealing of wooden elements.

1. Fast & Tool-Free Assembly

• The X-fix C connector is a self-tensioning plug-in connector that can be assembled without additional tools.
• Assembly time is significantly reduced as no screwing or drilling is necessary.

2. Strong & Precise Connection

• The combination with a loose tongue enables precise alignment of the components.
• The connection is form-fitting and transmits high shear and transverse forces, which is particularly important in timber construction (e.g., for ceiling and wall elements).

3. Hidden, Visually Appealing Solution

• The connection is not visible (recessed), which offers aesthetic advantages, especially with visible wooden surfaces.

4. Reversibility

• The connection can be reopened, which is very helpful for temporary structures or subsequent modifications.

5. Efficiency in Element Construction / Prefabrication

• Ideal for modular timber construction and workshop prefabrication:
• Components can be precisely prepared and quickly and securely connected on the construction site.
• Reduces assembly times and increases cost-effectiveness.

6. Compatibility with CNC Manufacturing

• The geometries of X-fix C and loose tongue connections can be precisely manufactured with CNC machines, which makes series production efficient.

7. Contribution to Fire Protection

• Due to the tight fit and form-fitting connection, joints can be reliably sealed – this helps to prevent smoke and flame transfer in case of fire (in combination with suitable materials and sealants).

made from certified birch plywood

Standard dimensions 20x40mm Length: 1500mm

Special sizes on request, max. length 3000mm

The groove is milled into the narrow sides or surfaces of the timber elements using CNC-controlled machining centers (e.g. Hundegger, Biesse, Weinmann).

Advantages:    

• Very precise (tolerances in the tenth of a millimeter range)
• Ideal for series production
• Groove geometry can be flexibly adapted (depth, width, shape – e.g. trapezoidal, rectangular)

Yes, for example, the companies MAFELL, FESTOOL, and LIGNATOOL offer specialized grooving machines and template systems that have been specifically developed for timber construction and carpentry. These systems allow for the precise routing of grooves for loose tenons, e.g., for accommodating X-fix C connectors or similar joining techniques.