Glue joints

Glued joints are “surface-fixed” connections of wooden components by means of glue. Shear forces in particular can be transmitted in the glued joint. Glued joints are very stiff connections that practically do not shift under load. They are mainly used for glued laminated timber, formwork beams, wooden panels and wood-based materials, but also for gluing in steel fasteners.

Due to their lack of ductility (elongation capacity), which is based on the high stiffness, glued joints are unsuitable for the formation of truss nodes.

Load-bearing glued joints in timber construction may only be made from glues that have been tested according to DIN 68141. These are currently mainly curable synthetic resin glues: Urea resin, resorcinol, melamine resin and epoxy resin glues.

Production of glue joints

The production of glue joints is subject to strict rules (e.g. a room climate of 20°C and a relative humidity of 65%) and therefore cannot usually be carried out on the building site. The production of glue joints is reserved for companies with a glue permit.

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