You are here: Home » Services » Tree Consultancy » Tree Condition / Safety Surveys and Quantified Tree Risk Assessments (QTRA)

Tree Condition / Safety Surveys and Quantified Tree Risk Assessments (QTRA)

Tree QTRA Image with logoTree Condition / Safety Surveys and Quantified Tree Risk Assessments (QTRA)

East Devon Tree Care are able to offer a tree risk assessment service based on the QTRA principles of risk assessment.

What is QTRA? A non-technical summary

Tree safety management is a matter of limiting the risk of significant harm from tree failure whilst maintaining the benefits conferred by trees.  Although it may seem counter intuitive, the condition of trees should not be the first consideration.  Instead, tree managers should consider first the usage of the land on which the trees stand, which in turn will inform the process of assessing the trees.

The Quantified Tree Risk Assessment (QTRA) system applies established and accepted risk management principles to tree safety management.  Firstly, the targets (people and property) upon which trees could fail are assessed and quantified, thus enabling tree managers to determine whether or not and to what degree of rigour a survey or inspection of the trees is required.  Where necessary, the tree or branch is then considered in terms of both impact potential (size) and probability of failure.  Values derived from the assessment of these three components (target, impact potential and probability of failure) are combined to calculate the probability of significant harm occurring.

The system moves the management of tree safety away from labelling trees as either ‘safe’ or ‘unsafe’, thereby requiring definitive statements of tree safety from either tree surveyors or tree managers.  Instead, QTRA quantifies the risk of significant harm from tree failure in a way that enables tree managers to balance safety with tree value and operate to a predetermined limit of reasonable or acceptable risk.

Tree Owners Liability 
Owners of trees have a legal responsibility to ensure that their trees are in a safe condition.  This is of paramount importance especially if the trees in question overhang a neighbouring property, a highway or public right of way, in order to limit the risk of damage or injury caused to a member of the public or their property. If you wish to instruct someone to carry out an inspection on your trees you need to ensure that the person inspecting those trees can demonstrate that they have sufficient knowledge to do so.

Qualifications and experience

Our consultant, Matthew Shute, has worked within the Arboricultural industry since 1999 and has gained a wealth of knowledge and experience from working within the field as a climbing arborist and through continued professional development and training during this time. In recent years, through a natural expansion of the consultancy side of the business, Matthew’s role within East Devon Tree Care has developed to become a full-time consulting arborist, advising a broad mix of domestic, county council and commercial land owners on tree safety issues.

  • Matthew achieved a Foundation Degree in Arboriculture awarded by Myerscough College in 2008.
  • Matthew has been a professional member of the Arboricultural Association (Membership no PR00669) since 2008.
  • The LANTRA award for Professional Tree Inspection is a benchmark standard for assessing tree conditions at a professional level. Matthew achieved this award in 2010 and can carry out a full assessment to suit your requirements whether it is for one tree within your property or several within an estate or woodland.
  • In 2013, Matthew also attended a course of training in the principles and application of the Quantified Tree Risk Assessment system. Matthew has attended training courses on Visual Tree Assessment through QTRA and is also a licensed QTRA user. East Devon Tree Care is certified to undertake Quantified Tree Risk Assessments (QTRA) for landowners, local authorities, parish councils and developers to quantify the level of risk posed by a tree in its current condition and location.
  • Matthew has a keen interest in veteran, ancient and historic trees. In 2017 he was invited to join the stakeholder group for the Ancient Tree Forum and their contribution towards the forthcoming Pan European VETcert qualification. In 2018 he became a training provider for the VETree; Valuing and managing veteran trees training course.

Consultancy Qualifications

Please don’t hesitate to contact us to receive your written fee proposal for any works you may require.