[CANUFNET] Constructing Driveways within Critical Root Zones

[Julian Dunster]

I like my peers but have never engineered them :)

On Behalf of Dunster and Associates Environmental Consultants Ltd.


Dr. Julian A Dunster R.P.F., R.P.P.., M.C.I.P., ISA Certified Arborist,
ASCA Registered Consulting Arborist # 378,
ISA Tree Risk Assessment Qualified
Honourary Life Member ISA + PNWISA

North American distributor for Rinntech
www.dunster.ca
www.treelaw.info
www.rinntech.info

On Mon/7/13/2020 12:03 PM, Mark Carroll via CANUFNET wrote:
> I don't have an example of a driveway being elevated, but there are 
> examples in the City of Toronto where the house was built this way. 
> The addition was built on stilts to preserve the roots. A full 
> concrete pad was elevated and the addition was built on top. It is not 
> uncommon for this to be done. England has made some good practices for 
> preserving their trees. They have actually built basements under the 
> roots of trees. There are engineered peers that can be drilled down to 
> the 2.5 to 3 meter depth that will support the needs of a carrying 
> load to build a driveway and keep the root zones intact.
>
> Mark Carroll
> ISA Certified Arborist, Qualified Arborist Tech
> All around nice guy
> Taking our environment first
> Thanks for connecting...
>
>
>     On Fri., 10 Jul. 2020 at 11:26 a.m., Astrid Nielsen via CANUFNET
>     <canufnet at list.web.net> wrote:
>     Hello Canufnet members,
>
>     I have a client that is building two homes on an infill lot where
>     there is a very large (106 cm), healthy silver maple. He is very
>     willing to explore different options for working around the tree
>     that would cause minimum disruption to the roots.
>
>     Does anyone have examples of building driveways within the
>     critical root zones of large trees that have managed to prevent
>     significant root damage and tree decline? Specifically, he is
>     considering a type of elevated driveway that would not require the
>     severing of roots or significant soil compaction, and dissipate
>     the pressure through posts. Although the posts would cause some
>     root damage, it would be significantly less than excavation for a
>     standard driveway. If anyone has examples of this type of
>     engineering, I would be grateful if you could share it with me.
>
>     Thank you,
>
>     Astrid
>
>     ______________________________________
>     *Astrid Nielsen, *MFC
>     Ontario Registered Professional Forester
>     ISA Certified Arborist®
>     ISA Tree Risk Assessment Qualified
>
>     astrid.nielsen at dendronforestry.ca
>     <mailto:astrid.nielsen at dendronforestry.ca>
>     +1.613.805.WOOD (9663)
>
>     www.dendronforestry <http://www.dendronforestry.ca>
>
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