Untersuchungen über physikalische und mechanische Eigenschaften der Bornmüllerstanne (Abies Bornmülleriana Mattfeld)

Summary

One of the more abundant softwood trees found in the north western part of the Blacksea- and Marmarasearegion in Turkey is Bornmüller fir (Abies Bornmülleriana Mattfeld) In order to provide basic information promoting the best utilisation of this species investigation were made about some physical and mechanical properties of its wood.

Material for testing was secured from 11 representative trees located in the Forests near Düzce and Bolu in the northwestern Blacksearegion of north Anatolia. The topography was mountainous. Absolute elevation of the collection area was about between 1000 and 1400 m. Trees were from 40 to 50 cm in diameter at breast height. Estimated age of the trees ranged from 126 to 213 years.

Variation of annual ring width, specific gravity, the effect of annual ring width on specific gravity of the wood, shrinkage, fiber-saturation point, moisture content of wood in the living tree, maximum moisture content of wood were determined. The mechanical properties determined from the tests on the air-dry material were: compression parallel to the grain, static bending, tension perpendicular to the grain, impact strength, cleavage, Brinell hardness.