UKTC Archive

RE: Summer branch drop

Subject: RE: Summer branch drop
From: David Bailey
Date: Jul 01 2018 22:12:11
Wayne, 

Sunshine,

I've just spent a hard weekend of under the bonnet of the wife, 15 year old 
car and trying to catch up with work which sees to be quite a bit faster than 
me.

As Douglas Adams said, "I love the sound of deadlines, the woooshing sound as 
they go by".

You present a depressing list of questions that will take an eon to answer 
and I am already late for my bath.

I would sugest that if you want to get answers, present no more than 2 
quesitons with easy to define answers.

I appreciate that you are interested in tree failure and that throws up all 
sorts of interesting things for people in the industry, but it will take me 
hours and hours and another site visit to answer your questions, time I don’t 
have.

Don't let me dishearten you, 

But help me out a little!

Dave


-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info <uktc-request@xxxxxx.tree-care.info> 
On Behalf Of Wayne Tyson
Sent: 01 July 2018 21:59
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Re: Summer branch drop

Interesting case, and I'd like to learn more about it. Do you have photos, 
date, and any links to media coverage or other information? Pre-failure 
photos or data?

More detail on "over-stretched?"

Angle between trunk and branch?

Dendrochronology details, especially with regard to the declining 
annular-ring intervals correlated with the year of root injury and paving?

Microscopic examination of punky wood just below break, especially for 
mycelial fragments?

Did break occur near the branch/trunk union or nearer the base of the bend?

Is branch otherwise normal-appearing with a normal taper, or are there any 
discontinuities, especially in diameter? Any cabling or other injuries to the 
branch?

Do parts of the tree appear "more healthy" than others?

How does this tree compare to others nearby (crown density, leaf size, etc.)?


Thanks,
Wayne



On Sun, Jul 1, 2018 at 10:33 AM, David Bailey <oldoaktree@xxxxxxxxx.net>
wrote:

Hi all,

I've got a case on where a 150-200 year old relatively healthy looking 
beech has dropped a 3-4 tonne 600mm over-stretched branch on a Mini 
below it. No-one hurt, but it was a still evening and the break 
pattern was not a tear out, it was more like cubeoid cracks. The wood 
appears to be very brittle and dry almost resembling brown rot that 
you get in conifers. I can't find any signs of decay fungi etc.

Growth rings on the tree have been getting noticeably slower almost 
down to nowt over past few years. The situation is estate built around 
tree
50-60 years ago some roots graded out, most of important rooting area 
built or paved over.

To be honest, I'm surprised it has lasted this long as the crown 
doesn't look too bad.

Has anyone dealing with a beech dropping large branches ever had a 
chance to have a look at the wood where the failure happened? What was 
your impression of the wood?

Cheers

Dave




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The UKTC is supported by Bosky Trees arboricultural consultancy
http://www.boskytrees.co.uk/