[CANUFNET] Planting Trees Over Slab

[Peter Wynnyczuk]

Hi,
A key conversation is what is the purpose of the slab, i.e., Parking roof, Condo
roof, as the reality is that at some point in the future waterproofing/membrane
replacement is needed. If that is every 25 to 30 years, planting decisions are
needed based on how difficult is it to remove the vegetation on the slab to help
determine appropriate sized species/vegetation.
As your climate conditions differ from southern Ontario, these are general
comments as it relates to some building parking garage roof rehabilitation I
have been involved in where all trees on and within 2m of the slab are removed
for waterproofing, losing 40cm DBH trees in the procees.
Sincerely,
Peter Wynnyczuk

> ---------- Original Message ----------
> From: "Hamilton, Emily via CANUFNET" <canufnet at list.web.net>
> Date: January 15, 2020 at 5:40 PM
> 
> 
> Has anyone had experience working with Structural Engineers or Architects
> regarding calculating load capacity of trees over slab?
> 
> 
>   1.  What kinds of communication have you had or issues have come up?
>   2.  What kinds of things have you asked for? I assume they should be
> calculating support for:
>      *   Static load of fully saturated soil
>      *   They should know if there's any structural soil or silva cells, or
> other materials in the planting zone.
>      *   They need to calculate for the mature tree size (this needs to be
> specifically communicated, not assumed).
>   3.  In addition, of course planter drainage and moisture protection for the
> building will need to be coordinated with the architect.
>   4.  What kinds of solutions have you had/seen for supporting large trees
> over slab?
> 
> 
> Regards,
> Emily
> EMILY HAMILTON  | ARBORIST
> 
> [COS_Tag_pp_cmyk-200]
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