Kerbs in Root Protection Areas

[Verena]

Hi all,

 

BS 5837 (2012) refers to "proprietary products" when it comes to installing non-invasive kerbs in RPAs of trees. Can anyone point me in the right direction of products they can recommend/specify? Architects on my project are currently specifying standard pin kerbs 100mm from a tree... not happy!

 

Thank you!

 

Verena

[John Shutler]

what is the rest of the spec? how much of the paved area is within the rpa? has a cellular confinement system been specced?

[Jesse]

Hi all,

 

BS 5837 (2012) refers to "proprietary products" when it comes to installing non-invasive kerbs in RPAs of trees. Can anyone point me in the right direction of products they can recommend/specify? Architects on my project are currently specifying standard pin kerbs 100mm from a tree... not happy!

 

Thank you!

 

Verena

Is that 100mm from the accurately calculated RPA of the tree, its surely not 100mm from the stem/base of the tree is it ???, if its the latter that would be fine, don't forget that a 20% offset can be applied on a single open grown tree. If its 100mm from the stem something has gone wrong in the Architects office.

[sloth]

Is that 100mm from the accurately calculated RPA of the tree, its surely not 100mm from the stem/base of the tree is it ???, if its the latter that would be fine, don't forget that a 20% offset can be applied on a single open grown tree. If its 100mm from the stem something has gone wrong in the Architects office.

 

100mm from the base of the tree would be shocking! Regarding the 20% offset, I think that went out the window with 5837:2005. Adjustments to the rpa must be based on judgement of the surrounding soil conditions.

If it is 100mm from the base kerbs could 'bridge' over the roots. I'd be questioning the road surface, if the kerb is that close the road must surely be well in the rpa?

[Jesse]

100mm from the base of the tree would be shocking! Regarding the 20% offset, I think that went out the window with 5837:2005. Adjustments to the rpa must be based on judgement of the surrounding soil conditions.

If it is 100mm from the base kerbs could 'bridge' over the roots. I'd be questioning the road surface, if the kerb is that close the road must surely be well in the rpa?

 

Your LPA working to 5837 2012 are they ?, most forms still request 2005 I know it should now be 2012 but what, how should you respond when the application form references 2005, ??? its all , and I would now normally use a word relating to the sexual reproductive anatomy of a dog, Its all wide open now, game on in the developers favor . Shame really, I thought the was much more hope for retention and protection with the old 2005 5837.

[sloth]

Most certainly requesting '12, the LPAs round here are quite clued up. Which is nice for the trees as they won't accept bull poo reasoning, and are more often asking for arb site monitoring which is better than strict TPPs which are ignored without question...

[Jesse]

Most certainly requesting '12, the LPAs round here are quite clued up. Which is nice for the trees as they won't accept bull poo reasoning, and are more often asking for arb site monitoring which is better than strict TPPs which are ignored without question...

 

Well you must live a million miles from me. At the end of the day its JUST a recommendation, I tried for about 5 years assisting our LPA to accept the guidance, but the pound has always come first. Trees second.

[Jesse]

Well you must live a million miles from me. At the end of the day its JUST a recommendation, I tried for about 5 years assisting our LPA to accept the guidance, but the pound has always come first. Trees second.

 

I should of also said, I'v a number of friends who are TO's , it seems not to be the ethics of the TO, its the powers from above which DICTATE .

[Jesse]

I'v also yet to find a TO capable of disambiguation , especially when challenged with in depth knowledge of 5837 which ever year .

[Verena]

Hi all,

 

Thanks for all the replies!

 

The surface is called "golpla" (not heavily used area), and the landscape architect says he has specified it with pinkerbs before. The edge is currently REALLY 100mm from the base of the tree. To be fair to the landscape architect, the footprint of the proposed hard landscape is based on an existing compacted gravel area, but he was cheating a little, so will hopefully move the edge to the original 500mm from the tree.

 

Bridging sounds intriguing, sloth, just not quite sure how that would work technically with standard pinkerbs they're insisting on using? Cost is- as always- an issue, and I tried to sell them the railway sleeper idea... "lovely" they said and showed me their empty pockets... :-(

 

Verena