Edged board 25, 30, 40, 50mm thick, not calibrated in width (each board has its own width) is widely used for the construction of both private and industrial facilities for flooring, formwork and shields, etc. It is precisely due to its physical and mechanical properties that wood is widely popular for use in both load-bearing and auxiliary structures of buildings and structures. Buying a high-quality pine board or buying a high-quality pine beam or rail is the key to successful construction. It is especially worth paying attention to the fact that the material is free of pests (no sawflies) and free from fungal damage (no blue stain). Also extremely important is the issue of observing the geometry of the lumber, which greatly affects the possibility of its further installation and operation. Depending on the cross-section of the lumber itself, its transverse dimensions must be within the range of 1mm - 3mm deviation from the declared dimensions, which is regulated by standards and is called "tolerances of deviations of dimensions of transverse cross-section". Also, the lumber must be within tolerances in longitudinal dimensions, which is also regulated by building standards (propeller run) and has a strong impact on the further use of the lumber. Therefore, before buying lumber, be sure to pay attention to the above information, and do not be guided by the rule that finding "cheap" lumber means saving. Usually it is cheap precisely for the above reasons: non-compliance with dimensions, longitudinal curvature and the presence of woodworm and fungal impressions. We wish you the right choice of lumber and successful construction.