Objected beam is lumber that has four processed longitudinal surfaces. Characteristics of the material correspond to GOST.
The width and thickness of this beam is at least 100 mm. If the width and thickness is less than 100 mm, then such a board belongs to the timber, but it cannot be called a trim to name.
The standard beam of the overlain has a rectangular or square section, and the ratio of the width to the thickness of it is 1: 2. It is made in the process of cutting logs of the caps on squares. Most often, the beam of the wiped has such sizes such as 100 by 100 or 150 by 200. But there are other parameters that can be recreated in the manufacture of lumber.
The source material for the production of a beam can be any. But often really use breeds such as spruce, fir, larch. The material is chosen depending on what purposes this beam will be used because. The most popular is pine due to its satisfactory technical characteristics. The pine is stable for decay, but “blue” is characteristic of this material, it very much spoils the appearance.
The spruce board is no longer resistant to decay, so it recommends using such material only for internal work. The beam of larch is not subject to even a high level of humidity, in adverse conditions it is able to even improve its qualities. But its cost is quite high.
So the wiped beam has both advantages and disadvantages. Of the shortcomings, I would like to note the likelihood of deformation, since it does not pass the stage of forced drying and not processed with special compositions. On the other hand, the latter can be attributed to the advantages, since the lack of chemical compositions indicates the environmental friendliness of the material.
