Representing Arborists in Queensland & Nth NSW
PO Box 327, Cleveland, BRISBANE QLD 4163
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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.image-set-2

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