Density Estimation by Drilling Resistance Technique to Determine the Dynamic Modulus of Elasticity of Wooden Members in Historic Structures

(1) The assessment of the mechanical properties old timber is essential for proper maintenance wooden structures. (2) Among non-destructive properties, dynamic modulus elasticity one best predictors characteristics members, but it requires determination wood density to be determined. (3) Thus, was estimated by drilling resistance measurements, developing species-specific prediction equations silver fir, chestnut and poplar. (4) combined with stress wave velocity propagating longitudinally through piece, calculated. (5) Medium-high coefficient determinations (R2 from 0.79 0.94) were found estimation, medium 0.53 0.60) estimation static using modulus.