VARIATION IN MECHANICAL PROPERTIES OF HORNBEAM WOOD (CARPINUS BETULUS L.) GROWN AT DIFFERENT ELEVATION OF GOLESTAN FORESTS, IRAN

In this study physical and mechanical properties of Hornbeam wood (Carpinus betulus L.) grown at two different elevations of Golestan Forests located in the north east of Caspian Sea were investigated based on the ASTM Standard.Selected trees were cut from two different elevations, at different heights in the trunk, at 4 different geographical directions of the trunk and also 2 different moisture contents.The results of statistical analysis showed that properties of Hornbeam wood from this region were influenced by elevations and to the lessees extend by geographical direction of wood specimens and tree heights