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“Uso Fiume” (UF) beams are a traditional peculiarity of the Italian wooden carpentry. They are produced by parallel sawing of the log on four faces, which results in wanes on their whole length, while their cross section is constant from end to end. Structural timber is subjected to the dispositions of the European Construction Products Regulation (CPR) and since January 2012 it can be placed on the market only if CE marked; structural timber with irregular section, such as UF beams, shall be graded on the basis of a specific procedure named European Technical Assessment (ETA). In particular, UF beams made of larch (Larix decidua Mill.) wood can be CE marked according to ETA –11/0219. This is a relevant factor for the enterprises of some Italian Regions, such as Aosta Valley, where larch is widespread and commonly used for producing structural assortments. In this context the present work aims to assess the characteristics of UF larch beams production in the above geographical site. To this purpose a survey was addressed at regional sawmills producing these assortments. The inquiry was also designed in order to investigate different aspects such as enterprises dimensions, origin of round wood and production methods. The survey gave a picture of this production reality and can provide useful considerations for similar cases in other Italian or European Regions.Uso Fiume (UF) grede tradicionalna su posebnost talijanske drvene građe. Proizvode se paralelnim piljenjem trupca u četiri plohe, što rezultira nepravilnim rubovima cijelom duljinom dok im je presjek ujednačen. Strukturna građa mora biti u skladu s Europskom uredbom o građevinskim proizvodima (CPR), a od siječnja 2012. može biti na tržištu samo ako ima oznaku CE. Strukturna građa nepravilnih dijelova kao što su UF grede mora se klasificirati na temelju određenog postupka koji se naziva europskom tehničkom procjenom (ETA). Konkretno, UF grede izrađene od drva ariša (Larix decidua Mill.) mogu biti označene CE oznakom u skladu s ETA - 11/0219. To je relevantan čimbenik za poduzeća u nekim talijanskim regijama kao što su Aosta Valley, gdje je ariš rasprostranjen i često se upotrebljava za izradu strukturnih proizvoda. U tom kontekstu, cilj je ovog rada procijeniti obilježja proizvodnje UF greda od arišovine u regiji Aosta Valley. Za tu svrhu provedena je anketa u pilanama regije koje proizvode UF grede. Anketni je upitnik izrađen tako da bi se mogli istražiti različiti aspekti proizvodnje kao što su dimenzije pilane, podrijetlo trupaca te proizvodne metode. Istraživanje je omogućilo da se stvori slika stvarne produktivnosti, koja može dati korisne podatke i zaključke za slične primjere u drugim talijanskim ili europskim regijama

Assessment of “Uso Fiume” Larch Beams Production in the Sawmilling Industry of Aosta Valley Region – Northwestern Italy