Quantified Tree Risk Assessment (QTRA)

Estimating the likelihood of tree or branch failure is a key component of any tree risk assessment. In QTRA, we use a system of bench marking our estimates, where we consider those things that we are least confident in (partially compromised trees and branches) against our two benchmarks (a. structurally optimised trees and b. wholly compromised trees) where we have the greatest confidence in our judgement.

In 2015 we ran several field days where Arborists were able to trial our approach, calibrating their estimates and putting them into one of the QTRA Probability of Failure ranges. These field days are free of charge and you don’t need to be a QTRA user.

For more information or to book, please contact: admin@qtra.co.uk or visit website: QTRA website