UKTC Archive

RE: Tree Root Literature

Subject: RE: Tree Root Literature
From: Philip van Wassenaer
Date: Nov 04 2019 18:11:21
Every tree is different. This is very hard to standardize with so many 
variables with every tree you might look at.


Philip van Wassenaer, B.SC., MFC
Principal Consultant
Urban Forest Innovations Inc.
Mississauga, Ontario, Canada
www.urbanforestinnovations.com



-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info 
[mailto:uktc-request@xxxxxx.tree-care.info] On Behalf Of Michael Richardson
Sent: November-04-19 12:49 PM
To: UK Tree Care
Subject: Re: Tree Root Literature

All good choices.  I have gathered enough info for a basis of understanding
but now the issue is how does the soil, and specifically the depth of
rooting affect the stability of trees.

Mattheck and others have done some calculations with regards to
counter-weighting the sail.

I am now looking for a standardized protocol for assessing minimum root
plate required to maintain stability of the tree, both under static and
dynamic load.  I am particularly interested if there is a protocol that
discusses how soils and water should be evaluated and what part they play
in stability.

Michael Richardson B.Sc.F., BCMA
Ontario MTCU Qualified Arborist
Richardson Tree Care
Richardsontreecare.ca
613-475-2877
800-769-9183

  <http://www.richardsontreecare.ca/images/Tree_Doc_logo_email.png>



On Mon, Nov 4, 2019 at 12:36 PM Mark Mackworth-Praed <
uktc@xxxxxx.tree-care.info> wrote:

Hi Michael & Bill

The Mattheck/Breloer 'formula' for structural root plate radius is/was
3.5-4.0 times trunk diameter - if I remember rightly, their argument was
that the fatter the tree, the more it relies on the dead weight of its own
trunk to support it, but I've always assumed the 4 X diameter, in order to
be on the safe side. The other paper that might be worth looking at is
Gasson and Cutler 'Tree Root Plate Morphology', Arboricultural Journal
1990, Vol 14 No. 3, pp 193-264, which analysed results from the Kew tree
root survey following the October 1987 storm in SE England. The tree
species & soil types they looked at might not be applicable/transferable to
the case you're looking at though, I guess, but it might be some help
nonetheless.

Kind regards
Mark M-P

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info 
<uktc-request@xxxxxx.tree-care.info>
On Behalf Of Bill Kowalczyk
Sent: 04 November 2019 13:31
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Re: Tree Root Literature

Hi Michael

I remember (not so much these days!) about 20 years, or so, ago Claus
Mattheck came up with calculation for minimum rootplate diameter in
relation to stem size to maintain the structural integrity with regards to
wind-throw.

I don’t have my books to hand, but it might be a pointer in the right
direction…

Regards,

Bill

On 3 Nov 2019, at 12:41, Michael Richardson <
richardsontreecare@xxxxxx.com> wrote:



3) method of *visual* inspection to determine the size of root plate
necessary to remain stable under wind loads





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The UKTC is supported by Bosky Trees arboricultural consultancy
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