Almost all the building materials used in the sites are purchased in industrialised form, as a finished product. They were manufactured by a factory, for example: steel/concrete reinforcements, bricks, coverings, plasterboards, OSB, doors, windows etc. The same working system must also be applied for the wooden structures, which can be executed in a specialised production unit and delivered to the site in a packaged system. Thus, all the elements of the wooden structure are prepared in the factory in the form of lattices or rafters cut to size. The classical method of building wooden structures directly on the site, from raw timber, must be abandoned.