ABSTRACT
Studies that approach the technological parameters of wood with wide use, such as Eucalyptus grandis, are fundamental, since their suitable use and exploitation are dependent on these characteristics. Currently, this species implantation has been expanded and the spacing is a determining factor. Therefore, the aim of present study was to evaluate the plant spacing and radial variation in static bending of Eucalyptus grandis wood. For the experiment conduction, six trees were sampled for each spacing: 2.0 x 1.0 m, 3.0 x 1.0 m and 3.0 x 1.5 m, totalizing 18 specimen at seven years old. Subsequently, the first log of each sample was sectioned into radial boards and then made into test specimens, which were identified at regular intervals in the pith-bark direction, with dimensions of 2.5 x 2.5 x 41.0 cm, to perform the mechanical static bending test, following the ASTM recommendations. The mechanical resistance results showed a variation in the pith-bark direction, where the highest MOE, MOR and TPL values were near to the bark. However, the spacing did not change the modulus of elasticity, modulus of rupture and tension on proportional limit of the material subjected to static bending. Thus, only the radial position influences in the wood quality. The values of the studied mechanical properties had an increase in the pith-bark direction, being more accentuated in the region near the bark.
Keywords
Technological properties; Mechanical properties; Population density; Fast-growing species
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