Any ideas for fence post in back filled trench?

[angelboy]

I have 600mm deep drainage trench to which the outside edge is exactly the line for the new fence.

As the ground it pretty much all dug up I can either backfill then later dig the post holes (400mm) to fill with concrete and away we go....

or.......


use some 200mm moisture resistant cardboard tubes, placed at level before back filling, then the holes are ready for the post and concrete.


What to you think?


As anyone used 160mm plastic drain pipe filled with concrete?

 

[mcluma]

I have used the cardboard tubing, to make foundations for my carport

I wouldn't use the drainpipe, i think the concrete will not harden enough

ps your post for fence need to be 600mm

 

[angelboy]

I have used the cardboard tubing, to make foundations for my carport

I wouldn't use the drainpipe, i think the concrete will not harden enough

ps your post for fence need to be 600mm

To be honest I've already put up 7 sections of close boarded fencing which never even creaked in all the wind. I'll have to dig out my original paperwork as I might even have ordered 3m lengths with 600mm below ground. Sounds more possible!

Where did you get the cardboard tubing from?

I've found a supplier in Essex but if there's other options closer to home it might be better. (DN22)

 

[mcluma]

The one in essex is the one i also used,

http://www.essextubes.com/

I just don't think the 400mm is long enough.

i have done now more then 200feet of fencing, 200 feet of retaining wall and i wouldn't do anything less then 600mm

the post i bought were all 2700mm

first 200mm gravel board then 50mm ledge/edge on top of the gravel board to set the featheredge on, then 1800mm featheredge