The resistance drilling device we have on hand is the Resistograph F400. The F400 allows us to quantify the presence and extent of decay into the interior of a tree at one point. The drill bit is minimally invasive (3mm) and the resulting digital image provides a wealth of detail. Risk thresholds within strength loss formulas are then used to gauge the severity of risk.
Resistance Drilling
The resistance drilling device we have on hand is the Resistograph F400. The F400 allows us to quantify the presence and extent of decay into the interior of a tree at one point. The drill bit is minimally invasive (3mm) and the resulting digital image provides a wealth of detail. Risk thresholds within strength loss formulas are then used to gauge the severity of risk.