UKTC Archive

Re: When was NHBC Chapter 4.2 Building near trees first published?

Subject: Re: When was NHBC Chapter 4.2 Building near trees first published?
From: Jerry Ross
Date: Feb 06 2019 08:34:12
Some references are to be found on the link below (I reduced them as much as I could but the file is still too big to post here)

And I believe you've been referred to these publications before - they would be helpful.
https://is.gd/RAK3w8
https://is.gd/SL6sjz

I've linked 1 file to this email:
Subs References.pdf <https://app.box.com/s/omo802lwr3cy67ocfud570ripxhvtc55>(574 kB)Box <https://www.box.com/thunderbird>https://app.box.com/s/omo802lwr3cy67ocfud570ripxhvtc55 Mozilla Thunderbird <https://www.thunderbird.net> makes it easy to share large files over email.

jerryross.co.uk logo
On 05/02/2019 23:44, Wayne Tyson wrote:
I'm crawling back into this, hat in hand, full of ignorance, trying to
understand the scientific foundations of this issue, so please bear with
me. I have reviewed Chapter 4, but no other references.

1. Is "subsidence" due to the shrink/swell behavior of clays, and it
removal of *available* moisture from said clays the sole mechanism of
action involved?

2. Has this been measured and quantified?

3. Has the work providing the scientific foundations been published in one
or more peer-reviewed publications and has the experimental work been
replicated by other independent researchers?

4. What is the basis for determining the distance from a building
foundation that a tree or shrub can be planted?

5. I have some cases at hand where building foundations have apparently
interfered with root system development to the point of contributing to
tree failure (and deaths) due to the proximity of trees. Removal of
segments of root systems by trenching has apparently also led to failures.
Does anyone know of similar cases? References? Links?

Wayne

On Tue, Feb 5, 2019 at 1:24 PM Simon Pryce Arboriculture <
info@xxxxxxxxxxx.co.uk> wrote:

That's NHBC Practice note 3 1985, which was similar in most respects to
Chapter 4.2 including foundation depth calculation method, based on
Giles Biddle's work. Previous editions of 1969 and 74 were more basic
and advocated maintaining appropriate distances between trees and
buildings rather than deepening foundations, with some species
recognised as being more problematic than others.

Simon

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8HP +44 1923 XXXXXX +44 7710 XXXXXX
www.simonpryce.co.uk




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