Quantified Tree Risk Assessment (QTRA)

The Quantified Tree Risk Assessment (QTRA) system applies established and accepted risk management principles to tree safety management. QTRA quantifies the risk of significant harm from tree failure in a way that enables tree managers to balance safety with tree values and operate to a predetermined limit of reasonable or acceptable risk.

Wharton is a Licensed User of QTRA, which is implemented where appropriate. Additionally Wharton implements other hazard rating systems where the use of QTRA is not considered appropriate. Alternative solutions follow industry best practice and guidance will be discussed with clients prior to any formal instruction.


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For natural advice or a quote to successfully manage your project, call or email today!

Email us hello@wnic.co.uk
Midlands Office 01789 459 458
South Manchester Office 01625 708 800
“Worcester City Council employed the services Wharton Tree & Ecology Consultants to carry out decay detection on a number of mature trees lime trees. The service and report they provided was prompt, detailed and to a high standard. The findings allowed the Council to take an informed decision on how to manage trees on a land mark site in Worcester City.”
— Oliver Kaye, Worcester City Council