علی رضانژاد
حبیب اله عرب تبار فیروزجائی

With the aim of measuring the treatability and durability of Iranian commercial timbers against Fung, termites and marine borers, Heartwood samples of Oak(Quercus castaneafolia), Beech (Fagus orientalis), Hornbeam (Carpinus betulus), Alder (Alnus subcordata), Maple (Acer insigne) and Basswood (Tilia rubra) were prepared. The treatments were included natural and impregnated with Celcure and creosote. Evaluation of samples were done qualitatively and based on ASTM. According to the result of this study, Oak wood is extremely resistant to penetration and its treatability code is (3) and other wood species are permeable in pressure-treating and their treatability code is (1). According to the results of periodically evaluation of durability of wood samples, all of spices are perishable. All of the impregnated samples after 60 months installation in soil were sound. Natural durability of studied woods species against marine borers are low and less than 1 year. Impregnation with Celcure doesn't cause to increase durability but impregnation with Creosote, increased durability of timbers up to two years. All the treated and untreated samples in Caspian Sea were sound. It is concluded that there is no marine borers in south coasts of Caspian Sea. Key word: Treatability, field trial, Fungi, Termite and marine borers.