Complex protection of bearing glued timber structures

Abstract

The article substantiates the need for complex protection of bearing glued timber structures (Gluelam), including protection against biodegradation, variable humidity effects during operation, and fire exposure. The results of weathering tests of acrylic varnish developed at the Central Scientific Research Institute of Building Structures and its influence on the change in the moisture state of glued elements of a massive cross-section when exposed in the open air are presented. The possibility of flame retardant treatment of Gluelam in the factory is considered. It is shown that subject to the technology of applying flame retardants, the likelihood of damage to the applied coating decreases sharply when the Glulam is in the open air for 5-6 months. The results of observations of the state of fire-retardant coatings Phoenix DP and Pirilaks K45 on fragments of KDK when exposed to stands are presented.