Assessment of Different Measurement Methods/Techniques in Predicting Modulus of Elasticity of Plantation Eucalyptus nitens Timber for Structural Purposes

The mechanical properties of plantation Eucalyptus Nitens timber are currently assessed by applying visual stress grading (VSG) designed for the sawn from mature and do not represent actual characteristics resource. However, well-known limitation VSG application this resource led to discovery other methods grade its relevant structural grade. There is potential hardwood plantations in Australia supply wood industry be used applications. it necessary employ criteria evaluate before could satisfactorily purposes. This research aimed assess use non-destructive technique (NDT) through acoustic wave velocity (AWV), machine (MSG), multiple linear regression (MLR) model predict modulus elasticity (MOE) as a grade-determining factor. results showed that there was strong correlation (R2 = 0.88) between dynamic MOE (MOEdyn) static (MOEs) boards, proving NDT reliable method estimations E. nitens timber. MLR also density AWV effective parameters their combination can practical estimate MOE. high obtained MSG four-point bending, demonstrating flat-wise bending suitable fast grading. indicated measured edgewise direction correlates with both flatwise longitudinal directions. has applications wide range 7 GPa 21 GPa.