Review article

The strength and strain properties of wood and composite wood-based materials (such as LVL) at a given humidity are inversely proportional to temperature. This opens up great opportunities for the use of timber structures in cold climate conditions, including the Arctic climate. At the same time, the actual nature of temperature and humidity operating conditions is usually not stationary. There was carried out an experimental determination of LVL strength and deformations under compression along and across the fibers in three orthogonal directions under defrosting conditions with different initial temperatures and loading rates. When the initial temperature is reduced from 0 to -70 °C, the obtained temporary resistances of the material are higher by up to 35 %.