| Navigate this page and see the steps to incorporating this practice into your design and deliverables:
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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!
- Consider how leaf fall will impact building maintenance & performance.
During Construction
- Fence trees and show a tree protection fence on multiple sheets.
- Don't store materials or walk 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, this 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? |
| Team Member |
Responsibilities |
| general contractor |
- estimate cost impacts of working around trees
- develop a staging and stockpiling strategy
- will communicate the importance of saving trees to his sub-contractors
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| arborist |
- determine which tres should be saved based on health, hazard level, and species
- give recommendations on pruning and other potential delayed maintenance to protect and improve the heatlh of the tree
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| architect |
- may step the buildings as necessary to help you create a sound grading plan
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| landscape architect |
- may know which species are native and invasive
- will create a landscape plan based on the different shady and sunny regimes that will likely be created by saving a tree
- may prepare the grading plan
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| civil engineer |
- align utilities so that they don't pass under the driplines of the trees
- may prepare the grading plan
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| mechanical engineer |
- align utilities so that they don't pass under the driplines of the trees
- will 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 the size of the mechanical systems needed in the building
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| electrical engineer |
- align utilities so that they don't pass under the driplines of the trees
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| plumbing engineer |
- align utilities so that they don't pass under the driplines of the trees
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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.
- Confirm that materials are not being stored inside the fencing.
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| OPERATIONS & MAINTENANCE |
- Operations & Maintainenance Guidelines
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pdf |
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- 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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