Tree Protection Zone
Construction activities are inevitable as urban areas expand and revitalize neighborhoods. Existing infrastructure, including trees are often damaged as a part of construction activities. Soil compaction and root severance can lead to unstable trees or trees that decline over a number of years following construction activities. Protection of trees during construction activities may not be practical (or economically feasible) in all situations. In situations where a tree protection zone cannot be reasonably established, consideration should be given to the removal and replace of unprotected trees.
When it is possible to protect trees from construction damage a tree protection zone should be created during the planning stages of development activities. The Tree Protection Zone Calculator is based on research to help developers and planners adequately assess and protect trees during construction projects.
To use the calculator:
1. First measure the trunk diameter at 4.5ft from the ground of the tree(s), this is known as DBH
2. Type the DBH (inches) into the text box
3. Click the “Calculate” button
4. The results are displayed in feet and should be used to create a circular protection zone around the tree
Calculator created based:
Harris, R. W., Clark, J. R., & Matheny, N. P. (2004). Arboriculture: Integrated management of landscape trees, shrubs, and vines (4th Ed ed.). Upper Saddle River: Prentice Hall.
Tree Protection Zone Calculator
Enter DBH in inches
Estimated Tree Protection Zone