Ron,
I think you need to distinguish between sonic testing
and mechanical analysis more precisely.
I say this if only because I have yet to be shown
convincing results from arbsonic (and I've never been
shown "Metriguard") that would convince me that any
operator could persuade me to condemn a tree without
further investigation using aa "mechanical analysis"
such as Fractometer, Resistograph,DDD or DMP
--- ronhow <ronhow@xxxxxxxxxx.co.uk> wrote: > David,
Your basis for the assumption the tree will
collapse, may need to be more substantive
and dependent upon a greater degree of
investigation. Without seeing the tree, I would
suggest that your options need to be reviewed and
might include weight reduction at
the most so as to rebalance the tree. As a general
rule I would say that Sweet chestnuts
are at less risk of collapse than many other
species, their wood has the ability to 'fossilise'
far better than many others. The root damage is
unfortunate but certainly no excuse to add
insult to injury regarding the tree. I would suggest
you employ some form of mechanical
analysis to the tree in the form of 'sonic testing'
to ascertain the integrity of the wood.
Maybe you could supply us with more detail and some
photos!
Ron .............
----- Original Message -----
From: Dave Ward
To: UK Tree Care
Sent: Thursday, August 31, 2000 7:05 AM
Subject: Chestnut defects.
I have recently inspected a large mature chestnut
tree, which I believe has a number of defects and is
in danger of collapse onto an adjacent house, but
the local council disagrees. The tree is presently
subject to a tree preservation order, which the
present owner wants lifted so he can remove the tree
on safety grounds.
The tree is twisted along the trunk, nothing
unusual for a chestnut, but also has a large number
of ribs spiralling up the trunk. I believe these to
be helical ribs, but the council states they are
buttress flaring. Is it possible to definitely say
which they are. The tree is also leaning towards the
house which is only approximately five metres away
and built at a lower level. When the house was
built, the excavation work, must have severed all
the roots on that side, up to less than one metre
from the tree. At the same time, pruning was carried
out to remove branches near to the house, thereby
unbalancing the canopy.
With all these factors, could you recommend
removal on safety ground and why?
Dave Ward
=====
Alan Reeves
27 Garstang Road North
Wesham
Kirkham
Lancashire
PR4 3DB
01772 682706 07971 483637
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