UKTC Archive

RE: Assessing retained tree stability following part clearance of a tree group

Subject: RE: Assessing retained tree stability following part clearance of a tree group
From: Philip van Wassenaer
Date: Feb 23 2021 15:46:29
Ben,

Andrew  asked about the stability of the retained trees, not woodland 
management.... If Foresters have a way of assessing the likelihood of failure 
of these trees, please educate us. Otherwise David pointed out that the 
consulting arborist community has definitely devised a method to give answers 
to that question. Tree Pull Testing. From my 25 + years looking at tree risk 
assessments, I have not discovered another way that can give good answers 
about the stability of trees...

I am also not sure how your "art"  of where and when to thin has a lot of 
relevance to this specific question...

But I am keen to find out.

Cheers,

Philip

Philip van Wassenaer, B.SC., MFC
Urban Forest Innovations Inc.
1331 Northaven Drive
Mississauga ON L5G 4E8
Tel:  (905) 274-1022
Cell: (647) 221-3046
Fax: (905) 274-2170


www.urbanforestinnovations.com

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info <uktc-request@xxxxxx.tree-care.info> 
On Behalf Of BENJAMIN FUEST
Sent: February 23, 2021 3:33 AM
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: RE: Assessing retained tree stability following part clearance of a 
tree group


Hi David,

This is precisley why Arborists should not take on woodland management. 
Arboriculture is ok and has a place in the urban enviroment, maybe. It is 
absolutly usseles in the context of Sylviculture.

When to thin how much to thin and where to thin is an art form. Not a science.

Cheers
Ben

------ Original Message ------
From: "David Evans" <david@xxxxxxxxxxxxxx.com>
To: "UK Tree Care" <uktc@xxxxxx.tree-care.info>
Sent: Tuesday, 23 Feb, 21 At 08:03
Subject: RE: Assessing retained tree stability following part clearance of a 
tree group <<I'm interested in the collective's thoughts on assessing the 
impact of tree removal on the stability of adjacent retained trees.>> Hi 
Andrew The way I'd go about this is to run TreeCalc on the exposed trees to 
get a handle on the Basic Safety Factor.  Then have a look through Paul 
Muir's 2019 AA Conference presentation, and head to the section where he 
talks about modifying the wind load, around slide 49.
https://valid.tiny.us/2hqg8k4h <https://valid.tiny.us/2hqg8k4h> Cheers Acer 
Ventura


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The UKTC forum is supported by Bosky Trees arboricultural consultancy and
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