## 1 Introduction
It has also been shown that immersion in water after 24 h still creates swelling and dimensional changes up to 168 h. Reference [11] studied the methods of eliminating the relaxation of OSB boards after pressing, by the adhesive used type, by increasing the pressing time and by increasing the pressure. The heat transfer mechanisms and the optimum pressing parameters and a linear correlation equation between them were found. Other researchers [12] expressed the area of the strands in m\({}^{2}\)/kg. The range of variation of the surface of the strands is large, respectively between 15-279 m\({}^{2}\)/kg for variations of the thickness of the strands between 0.1-0.9 mm. Theoretical densities of the species were between 300-700 kg/m\({}^{3}\). The roughness of the strands was also taken into account. Reference [13] analyzed the use of fast-growing species in obtaining wood-based composites. They also used the technique of heat treatment of wood in order to improve the hygroscopicity properties of wood-based composite. Other authors [14] made a comparison between different categories of composite boards, emphasizing OSB as being cheap, made from wood of poorer quality, and successfully replacing plywood. Reference [15] studied the influence of heat treatment at 140-180 \({}^{\circ}\)C on OSB boards. Reference [16] studied the forest management practice on OSB properties. The control, thin, and fertilized trees were used and it was found that the anatomical structure is different but the mechanical properties are not significantly influenced by the type of wood used. [PERSON] et al. [17] studied the increased durability of OSB with White Cedar water extract as a natural fungicide. Reference [18] statistically studied the thickness of the OSB front layer for six plants in the eastern USA. It was found that the mean and median value of the front strand was 0.81 mm, respectively 0.36 mm. Other authors [19] studied the replacement of the core layer of the OSB composition with wood waste or other unsorted particles. The obtained results showed that even large proportions of 75% of these strands in the core structure of the board have led to obtaining OSB boards with good mechanical properties that meet the minimum requirements of standard [1]. Reference [20] analysed the influence of geometry, orientation, and content of thin strands on the properties of OSB boards (MOR, MOE, shear strength technique of simple linear regressions, and that of multi-linear regressions). The obtained results showed that the concentrated static loading of the samples offers conclusive data for interpreting the properties of the OSB boards. Paper [21] analysed the effect of methylene diphenyl isocyanate-MDI (3, 4, 5%, on dry mass) adhesive content on the heat-treated OSB board after fabrication at temperatures of 160 \({}^{\circ}\)C and 175 \({}^{\circ}\)C. [PERSON] et al. [22] made some evaluations on the use of the Paulownia (_Paulownia fortunei_) wood to OSB production but also on the use of nano-clay particles near UF resin. The obtain results showed a positive effect of nano-clay participation up to 5% of the amount of adhesive. Other research [23] sought to find the optimal orientation of the flakes in the OSB boards in order to find the optimum field of use and it was found that the boards with optimum orientation of the flakes are superior to the commercial ones. Reference [24] studied the introduction of thin strands in the composition of OSB boards for obtaining high performance boards. It has been shown that thin strands have a minimal effect on MOR and MOE, and the steam injection did not have spectacular effects on the properties of the obtained plates. Other research [25] used an image analysis technique to find an OSB board model with a higher quality. Five strand models evaluatedaccording to their geometry were used and it was demonstrated that there is a correlation between the geometry of the strands, the degree of orientation of the strands in the board and the mechanical properties of the board.