Thesis discusses the influence of heat treatment by Plato process on bonding performance. Influence of heat treatment on some mechanical and physical properties was also examined. Several testing methods were carried out according to standard procedure: the shear strength of Plato wood (SIST EN 392), delaminations of glue lines (SIST EN 291), modulus of elasticity and bending strength (SIST EN 310), density (SIST EN 323) and moisture content of Plato wood (SIST EN 322). 5 wooden species were tested: Norway spruce (Picea abies (L.) Karst., Douglas fir (Pseudotsuga menziessii Franco), poplar (Populus ssp.), birch (Betula pendula Roth.) and alder (Alnus glutinosa Gaertn.) treated by Plato process. Untreated Norway spruce, so as treated Norway spruce were tested for comparison; the last one only to the first stage (hydro-thermolised stage, HTNS). Test pieces were bonded with 3 structural cold-setting adhesive systems: melamine-urea-formaldehyde adhesive (MUF), phenol-resorcinol-formaldehyde adhesive (PRF), and polyurethane adhesive (PUR). It was found out that the bonding performance depends on wood species, and especially on the adhesive used. The results show the best bonding performance of the PUR, worse of the MUF, and the last of the PRF adhesive. It was also found out that the bending strength of Plato wood was decreased compared to untreated wood. Equilibrium moisture content of Plato wood in standard climate was about 50 % smaller than the adequate untreated wood.