What construction method is primarily employed to increase the strength of laminated wood?

The construction method that significantly enhances the strength of laminated wood is gluing in parallel layers. This technique involves bonding several layers of wood together with adhesives, ensuring that the grain of each layer runs parallel to the others. This arrangement effectively distributes loads across the laminate, enhancing its structural integrity and strength compared to a single solid piece of wood.

Moreover, using parallel layers allows for the selection of wood types that provide the desired mechanical properties, optimizing the laminate's performance for specific applications. This method also mitigates the effects of natural wood defects and variations, as the layers can be selected and arranged to overcome weaknesses inherent in individual pieces of wood, making laminated wood stronger and more reliable in aviation and other demanding applications.