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Engineering small diameter timber into structural members may provide an efficient way to utilize low-value material obtained after forest thinning operations. This study evaluates the strength and stiffness properties of finger-jointed and solid wood small clear samples cut from composite poles made of small diameter timber. The strength and stiffness of fi nger-jointed small clear samples were compared with the strength and stiffness of solid wood small clear samples and the strength and stiffness of composite poles. Finger-jointed samples tested in a perpendicular orientation, yielded the lowest bending strength but were not significantly lower than samples tested in a parallel orientation. Therefore, finger joint orientation was not a significant factor regarding the strength of the poles. The bending strength of composite poles was usually lower than the strength of the solid wood samples but higher than the strength of finger-jointed samples cut from the poles. However, the bending stiffness of the composite poles was substantially higher than the bending stiffness of both solid wood and finger-jointed samples cut from the poles.Prerada tanke oblovine u konstrukcijske elemente može biti učinkovit način iskorištavanja oblovine niske vrijednosti dobivene nakon operacije prorjeđivanja šuma. U ovoj studiji procjenjuju se čvrstoća i krutost uzoraka drva sa zupčastim spojem i uzoraka cjelovitog drva od kompozitnih stupova proizvedenih od tanke oblovine. Čvrstoća i krutost malih uzoraka drva sa zupčastim spojem uspoređena je s čvrstoćom i krutošću malih uzoraka od cjelovitog drva te s čvrstoćom i krutošću kompozitnih stupova. Uzorci sa zupčastim spojem opterećeni okomito na spoj imali su najmanju čvrstoću na savijanje, no čvrstoća im nije bila znatno manja od čvrstoće uzoraka sa zupčastim spojem opterećenih paralelno sa spojem. Dakle, orijentacija zupčastog spoja nije bio važan činitelj čvrstoće stupova. Čvrstoća savijanja kompozitnih stupova uglavnom je bila manja od čvrstoće uzoraka od cjelovitog drva ali je bila veća od čvrstoće uzoraka drva sa zupčastim spojem izrađenih od kompozitnih stupova. Međutim, krutost kompozitnih stupova bila je znatno veća od krutosti uzoraka od cjelovitog drva, kao i uzoraka sa zupčastim spojem izrađenih od kompozitnih stupova

Mechanical Properties of Finger-Jointed Wood from Composite Utility Poles Made of Small Diameter Timber