UKTC Archive

Re: RE: Level distortion monitoring

Subject: Re: RE: Level distortion monitoring
From: David Addison
Date: Jan 16 2004 15:40:36
Wouldn't a Civil Engineer/Geo-technical engineer give you a more definitive 
answer (preferably one with some arb knowledge)
 
Structural engineers are more steel/concrete/(brickwork) guys - arn't they?

Jon Astill <jastill@xxxxxxxxxx.ac.uk> wrote:
Dave,

Ideally, yes, but regrettably we do not live in an ideal world. This is just 
one of many reports I have seen by structural engineers where unsubstantiated 
recommendations are made. He has stated but a few of the facts. The building 
has cracks, they open and close, thirsty trees live near by etc..... No 
information is given about HOW the building is moving over a period of time 
and how this relates to the three trees that are each on different sides of 
the building. 

Jonathan 

Surely the Structural Engineer is the man you want. And results presented
clearly enough to see if/whether the areas where you have cracks, desiccated
soil, root identifications, etc, have dropped in line with the allegations.
Dave

-----Original Message-----
From: Jon Astill [mailto:jastill@xxxxxxxxxx.ac.uk]
Sent: 16 January 2004 13:10
To: UK Tree Care
Subject: Level distortion monitoring


Dear all,

A structural engineer has been called in to assess a building on campus
suspected of tree related subsidence. Based on the cracking in the building
alone a sweeping recommendation has been made that 2 mature oaks and a
eucalyptus in near proximity are reduced by 30% to mitigate the clay
shrinkage. I have been asked to arrange the work but I'm resistant to do
anything to the trees until a level distortion survey is undertaken and
further investigations are made. The estates manager has agreed to go ahead
with further investigation but would like me to source a list of
professionals suitable to undertake such work and make a more scientific
judgment. With exception to Giles Biddle (who will be included on the list)
does anybody know of other professionals that have a thorough understanding
of trees and building subsidence who can undertake level distortion
monitoring and give sound arboricultural recommendations based on their
findings? 

Thanks in anticipation.

Jonathan






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Regards 

David J Addison BEng MSc 
Parsons Brinckerhoff - Building Design Management 
WDHS/WSDS Managing Agent 
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