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| HOW? |
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By Design
- When grading, don't fill more than 12" under the tree dripline.
- When grading, don't cut more than 6" under the tree dripline.
- Consider how utility alignments and other excavation might affect tree roots.
- Transplant a large tree or sell it to be transplanted.
- An arborist report/tree inventory should identify the tree as healthy.
- The tree should be 10' or more outside a structure's footprint.
- Trees considered worth working around usually have a caliper (i.e. diameter) of 6" or greater diameter at breast height.
- Don't save a tree that's invasive!
During Construction
- Fence trees and show a tree protection fence on multiple sheets.
- Don't store materials or drive under the dripline.
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| WHEN? |
| There are no staging or time of year considerations for saving a tree, but this, like most BMPs, should be considered early in the design to maximize the number of trees that can be saved. |
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| ECONOMIC IMPLICATIONS (-$) |
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| WHY? BECAUSE trees |
| Ecological Benefits
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Communal Benefits
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| WHO? |
- The general contractor will estimate cost impacts of working around trees and make suggestions for staging and stockpiling.
- An arborist will inspect the health & species of the existing trees to determine which ones should be saved.
- The landscape architect may know which species are native and invasive and will want to incorporate trees to be saved into their landscape design.
- The civil engineer, mechanical engineer, and others will be designing utility alignments and should be informed that they can't show those lines running under the driplines of the trees to be preserved.
- The mechanical engineer should assess how the tree's location in relation to the building may create microclimates (i.e. wind tunnels, solar access, sunny spots, etc.) that affect energy demand in the building.
- Big Trees Today transplants large trees
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| DETAILS |
- tree protection fence detail
- tree protection notes
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dwg
dwg |
pdf
pdf |
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| CONSTRUCTION ADMINISTRATION |
- Hold a pre-construction meeting to address green goals with general and sub-contractors.
- Confirm fencing is present at site visits.
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| OPERATIONS & MAINTENANCE |
- Deice with sediments instead of salt. 1
- Aerate compacted soils. 1
- Examine root collar and mulch annually. 1
- Remove staking and guying after establishment. 1
- Use Integrated Pest Management. 1
- Properly dispose of tree waste that's diseased of contains pests. 1
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