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

[Liveanu, Robert]

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.
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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!

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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
www.laval.ca<https://can01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.laval.ca%2F&data=04%7C01%7Cmy.tremblay%40laval.ca%7Cec3b888e0037403d339708d8cf70014d%7C15ebd2ebb8cf40dd8e2bb2e67abb40ef%7C0%7C0%7C637487427315023800%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=YGbFwWfkPV1mwBIXvoyFz0MKfMe2vw0sbrYL09bU5n0%3D&reserved=0>

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