The Tree Protection Zones for trees located in Ravine and Natural Feature Areas have increased to afford greater protection to trees growing in these environmentally sensitive and significant environments.
Tree Protection Zones are the minimum required distances where tree protection is to be put in place so that no construction activity of any kind will take place inside the Tree Protection Zone.
Trunk Diameter
(DBH) (1) |
Minimum Protection Distances Required (2)
Trees in Areas Protected by the Ravine and Natural Feature Protection By-law |
<10 cm
10 – 30 cm
31 – 40 cm
41 – 50 cm
51 – 60 cm
61 – 70 cm
71 – 80 cm
81 – 90 cm
91 – 100 cm
> 100 cm
|
Whichever of the two is greater:
The drip line (3) or 1.2 m
The drip line or 3.6 m
The drip line or 4.8 m
The drip line or 6.0 m
The drip line or 7.2 m
The drip line or 8.4 m
The drip line or 9.6 m
The drip line or 10.8 m
The drip line or 12.0 m
12 cm protection for each 1 cm diameter (4) or the drip line |
Please see Table 1 - Tree Protection Zones in the City of Toronto’s Tree Protection Policy and Specifications for construction near trees for more information:
The Tree Protection Policy and Specifications for Construction near trees can be downloaded and printed using the following link: http://www.toronto.ca/trees/pdfs/TreeProtSpecs.pdf
1 |
Diameter at breast height (DBH) measurement of tree stem taken at 1.4 metres above the ground. |
2 |
Tree Protection Zone Distances are to be measured from the outside edge of the tree base. |
3 |
The drip line is defined as the area beneath the outer most branch tips of a tree. |
4 |
Converted from ISA Arborists’ Certification Study Guide, general guideline for tree protection barriers of 1 foot of diameter from the stem for each inch of stem diameter. |
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