Static instrumental control of the shafts by the VTA method
The survey involves the execution of direct analysis and measurements using the latest generation of specialist equipment.
The measurements are carried out with the use of the electronic pulse hammer that allows the presence of altered wood due to the attack of caries fungi and other internal defects such as cavities or fractures to be detected, measuring the reduction of the rate of diffusion of the sound wave in the woody fabric.
In the presence of internal anomalies, the dendro-densimeter Resi B400 is used, able to measure the density of the wood and then to identify the possible presence of cavities, caries, fractures of the woody tissue.
The residual resistance of the woody tissues of the tree is measured with the fractomer that measures the resistance of the wood to breakage and allows to determine the degree of resistance to the load of the entire shaft.
For monumental trees or based on customer requests, innovative and non-invasive tomography is performed with Arbotom 3-D.
The tomography of a section of the tree is nothing more than a three-dimensional map that represents the different speeds with which a sound pulse travels inside.
The speed of sound is not constant in the section of a trunk but varies according to many factors such as the presence of nodes, discontinuities, caries and other defects of the wood that can affect the stability. The tomographic map highlights: the presence, location and extent of any structural defects.
The VTA method also makes it possible to assess the danger of trees falling as a result of damage to the main roots due to various causes.