Boardwalk Stob replacement

[Fredsboy]

The orange blobs are 16 or so places where the supporting infrastructure has collapsed. I plan to use a recip saw to get access and then dig and drop  new stobs. Not sure if there is anything for the stob to bite into or if I need to place another stob opposite and add a new crossbeam - I'll find out tomorrow with a pilot/experiment

[Fredsboy]

Here you can see the drop where one pole has rotted the the next is still intact. Plus Teen upgrade to wheelchair kerbs - is there a proper name for the 'kerb'? PS don't take this as a Teen attack - I was one once and have engaged with the locals and asked if they want to join the repair work party - even gave them my number and no abuse suggests I got the wrong teens or they are just kids and hadn't thought through what they were doing - benefit of the doubt is the latter

[openspaceman]

Bay pond?

 

I never worked on that one.

 

We felled lots of chestnut at Nower Wood which would have been ideal for the top structure  and alder for the lower structure would be traditional. I was always wanting to go a nail-less route for these types of structures. We built a number of raised paths by laying pine poles 6ft apart and laying reject pebbles and as dug material from the sides to infill. Forty years later the only sign of the construction is the raised path with 3/4" galvanised  pipe which we used to peg the poles sticking out of the ground.

[Fredsboy]

Thx openspaceman, I have access to a lot of alder there, any suggestions as to how to incorporate?.

paul

[drinksloe]

Have u had a right good pinch in a few different places?

See how far it goes down.

 

The soil/sub soil type will make all the difference, if silty i would imagine posts should go tight just driving them in and not sink any more, different story with peat depending how deep the peat is as often on top of silty ground.

 

Id be buying UC4 treated timber or similar should be a decent guarantee 20+ years.

If ur worried about the posts sinking u can nail rails/timber on at 90 degrees, ideally just below ground level on each post or run rails linking the 2 oppisate posts at ground level holding both up

[Fredsboy]

On Friday I went back armed with camera and crow bar. This next pic shows how a boardwalk on a  board walk has been started and is the current plan to totally restore. You can see the new stringers protruding and placed on the previous boards. I'll try and use previous rather than old or original as I am not too sure of provenance

[Fredsboy]

Well that WAS the plan - before hanging all bets on that one, we opened up a collapsed section and found that perpendicular long poles used a s stringers has rotted

[Fredsboy]

I dug out under newath and found the earliest substructure seemed to be trunks , not sure what but think NOT Alder as it was an ivory white and not that orange as when cut Alder is exposed to air. Too far gone to really tell. I have tried to 'draw' what I found. A bed of Timber, then at 90degrees two telegraph poles making up two stringers with oak boards at 90 degrees making the path. In some sections there are very short poles also rotten suggesting a  repair.

[Fredsboy]

This is a great pic looking back over the exposed inspection. Yo can clearly see a cross section. I have gently placed a pre-cut stob to give some scale. You can also see the bed looks more like a compost pile than support for a board walk. Very rich in insect diversity!

so I am now thinking.. and this is where you come in with feedback but gentle PLEASE.... I could place a series of sobs and cross- pieces in the gaps and use new 6"*4" stringers slotted in UNDER the good boards at either end, OR, drop some appropriate sized Alder and use those trunks to replace telegraph poles - BUT I don't know enough about Alder to know if it will rot too quickly; OR a combination OR another idea (please).

Either ways - i am glad we did the inspection last week just pushing on with over laying would have been an expensive mistake, and as a  charity, funds are VERY scarce

[DuncanH]

On 22/07/2021 at 17:57, Fredsboy said:

Here you can see the drop where one pole has rotted the the next is still intact. Plus Teen upgrade to wheelchair kerbs - is there a proper name for the 'kerb'? PS don't take this as a Teen attack - I was one once and have engaged with the locals and asked if they want to join the repair work party - even gave them my number and no abuse suggests I got the wrong teens or they are just kids and hadn't thought through what they were doing - benefit of the doubt is the latter

 

 

Those 'kerbs' are generally known as kickboards, at least when we make boardwalks