## 1 Introduction  
Oriented strands boards (OSBs) are increasingly sought after on the construction materials market due to its excellent properties, especially due to the increasingly competitive price. As a composite material, these boards have wood chips as their matrix and adhesives as reinforcement. European standards in the field of OSBs [1,2] classify them according to the field of use as indoor boards (OSB/1 and OSB/2) and outdoor boards (OSB/3 and OSB/4) and from the point of tenacity in light-load-bearing boards and high-load-bearing boards. OSBs are usually made of three layers: two surface layers with large chips and a core layer with smaller chips. The three layers are symmetrical, although the core layer is thicker, thus ensuring high dimensional stability and balanced strength in the direction parallel to the fibers of the surface chips (in the direction of board length or major axis), and perpendicular to them (in the direction of board width or minor axis). From this last point of view, OSBs are almost similar to plywood; one difference could be thatthe price of OSBs is much lower than plywood, which it successfully replaces today in the construction field. Some authors [3; 4; 5] evaluated the possibility of making OSBs without using the classic strands after obtaining OSBs with an outer layer of chips that is four times smaller than those in current factory technology; they were compared with commercial OSB/3 boards. The results led to the idea that a new standard and category of OSBs can be considered. On the other hand, the air permeability rate, having as variable parameters the board thickness of 12 and 18 mm and the board type of OSB/3 and OSB/4, were measured. Test specimens made of OSB/3 had a low permeability resistance of 61% for both thicknesses. The possibility of making low-density OSB/3 boards from industrial pine chips was also evaluated. Boards with a minimum density of 425 kg/m\({}^{3}\) were obtained (with a compression coefficient of 0.85 for the analyzed pine species), which had the physical and mechanical properties above those required by EN 300:2006. In 2020, experimental studies on OSB-LVL joints [6], using a 6 mm thick OSB, were conducted. A simplified 3D nonlinear finite element model was also used to find the behavior of the structure subjected to vertical and lateral loads. Good results using OSBs were obtained. OSBs from balsa wood scraps [7] and the use of an adhesive based on castor oilwas also obtained. The boards obtained with different densities and percentages of adhesive were analyzedby comparison to the standard EN 300:2006. A better compression was confirmed by a density of 650 kg/m\({}^{3}\) and an internal bond of 0.46 MPa. An analysis between OSBs and other composite boards such as Medium Density Fibreboard and classic chipboard [8] was made in order to study its capabilityof use in the furniture and interior decoration industry. Other research [9; 10] studied the influence of isocyanine adhesive content on the properties of OSBs treated at high temperatures of 160 and 175 \({}^{\circ}\)C. In 2012, other groups of researchers [10] studied the use of OSBs as a substrate in wood flooring, noting that there are minimal distortions in the use of OSBs. Other authors made an ecological OSB [11] from chips of cypress and pine wood and replaced the synthetic adhesive with a mixture of lignin and tannin. The OSB made of cypress chips was more resistant to termite insects, and putrefaction resistance increased with anincrease in the ratio of cypress chips to pine chips. A group managed by [PERSON] [12] tested an ecological OSB obtained in the laboratory against fungal attack. From the research, an optimum resin-wood combination, from the point of view of biological and mechanical properties, was obtained. Other authors [13] wanted to obtain rigid OSBs to be used in floors. During the research, two types of chips were used: one with 90% aspen and 10% birch, and another with 100% pine.