CORRECTLY MEASURE DIAMETER
Diameter at Breast Height (DBH)
How to correctly measure Diameter at Breast Height (DBH)
The DBH is essential for calculating the Tree Protection Zone (TPZ). DBH is normally given as the diameter of the trunk/stem of the tree at 1.4 metres from the ground. In some circumstances it is not possible to measure a diameter at this height: please see the diagrams for variations.
