[CANUFNET] Normes de sécurité concernant l'excavation et les arbres / Safety standards for trees and excavation

[pwassenaer1022 at rogers.com]

Robert,

 

I also remembered that Jean Claude Ruel at U. Laval has a graduate student
looking at root cutting using pulling tests. Maybe they have some results
for you that me be helpful. Their experiment was going to be in Quebec City
and they were going to progressively cut roots closer to trees and study the
effect on stability with pulling tests.

 

His contact information is:

 

Jean-Claude Ruel

Professeur titulaire 

Faculté de Foresterie,géographie et géomatique - Départ sces du bois et de
la forêt

Université Laval

T  418 656-2131, poste 407665

E Jean-Claude.Ruel at sbf.ulaval.ca <mailto:Jean-Claude.Ruel at sbf.ulaval.ca> 

 

Maybe this might help too!

 

Cheers,

 

 

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



 

 <http://www.urbanforestinnovations.com/> www.urbanforestinnovations.com

 

 

 

From: CANUFNET <canufnet-bounces at list.web.net> On Behalf Of Liveanu, Robert
via CANUFNET
Sent: November 24, 2022 12:29 PM
To: Canadian Urban Forest Network <canufnet at list.web.net>
Cc: Liveanu, Robert <r.liveanu at laval.ca>
Subject: [CANUFNET] Normes de sécurité concernant l'excavation et les arbres
/ Safety standards for trees and excavation

 

Bonjour-Hi

 

English follows below.

 

Est-ce que quelqu'un sait s'il existe une norme CNESST spécifique en lien
avec les excavations à proximité des arbres? Nous avons un cas où les
ingénieurs exigent l’abattage d’un arbre comme mesure de sécurité pour les
travailleurs, tandis qu’à la Foresterie, nous sommes d’opinion que compte
tenu de l’essence et le DHP de l’arbre, et la distance et nature de
l’excavation, l’ancrage de l’arbre ne sera pas compromis, surtout si
l’effort (peut-être superflu) est mis pour soutenir l’arbre comme dans cette
photo-ci <https://www.ebing.ca/EBing-Projet-Support-de-poteaux-3.jpg> . Le
problème se présente puisqu’à notre connaissance, la norme du CNESST
concernant les arbres est une approche unique qui traite les arbres comme un
poteau ou lampadaire, peu importe l’essence, son DHP, l’environnement, etc.

___

 

Hello,

 

This age-old question is mostly targeted to Quebec professionals, but any
insight from other provinces is appreciated as well as it’ll be interesting
to compare. Does anyone know if there is a specific CNESST – Quebec’s
occupational health and safety governing body – standard related to
excavations near trees? Or what does your own province’s safety body have to
say? We have a case where the city engineers are asking to remove a tree as
a safety measure for the workers, while at the Forestry department we’re of
the opinion that given the species and DBH of the tree, and the distance and
nature of the excavation, the stability of the tree wouldn’t be compromised,
especially if the (perhaps superfluous) effort is put into supporting the
tree as in this photo
<https://www.ebing.ca/EBing-Projet-Support-de-poteaux-3.jpg> . The problem
arises because, to our knowledge, the CNESST standard for trees is a
one-size-fits-all approach that treats trees like a pole or lamp post,
regardless of the species, DBH, its growing environment, etc.

 

Merci, thank you!

 

___

Robert Liveanu, MFC, B.Sc.

Arboriculteur certifié de l’ISA

Technicien à la foresterie

Division Foresterie & Horticulture

Service des travaux publics

Tél. 450-978-6888 poste 4775

 
<https://can01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.laval.
ca%2F&data=04%7C01%7Cmy.tremblay%40laval.ca%7Cec3b888e0037403d339708d8cf7001
4d%7C15ebd2ebb8cf40dd8e2bb2e67abb40ef%7C0%7C0%7C637487427315023800%7CUnknown
%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6M
n0%3D%7C1000&sdata=YGbFwWfkPV1mwBIXvoyFz0MKfMe2vw0sbrYL09bU5n0%3D&reserved=0
> www.lavalca

 



 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.web.net/pipermail/canufnet/attachments/20221124/efd2d998/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 3340 bytes
Desc: not available
URL: <http://list.web.net/pipermail/canufnet/attachments/20221124/efd2d998/attachment.jpg>