Review article

The experience of mass production and application of new glued wooden constructions (GWC) has shown that a simple transfer of traditional methods of calculation and design to new designs is not always correct. Graphical representation of the fields of operating normal stresses and wood resistance fields, even at simple uniaxial tension along the fibers, shows, that the limiting state initially occurs not in the direction of the principal symmetry axes, but at an angle to the fibers. The study and analysis of the nature of the primary defects and signs of destruction of laminated wood and plywood in modern glued wooden construction allowed us to make some adjustments to the explanation of their limiting state. In our approach, an attempt was made to consider the geometric location of inclined areas where the presented normal stresses have the greatest excess over the strength characteristics of strongly anisotropic material.