Concrete in WPC fence post

Hello everyone,

I hope I can get some help from you here.

After 3 years in our new building, we finally want to erect a privacy fence. We would like to install 1.80m x 1.80m WPC fence panels over a length of 23 meters. At the edge of our property, we have placed Bellamur 50 x 25 x 20 masonry stones. These stones are stacked in 2 rows on top of each other and placed on gravel, and filled with concrete. We did this because there is a small height difference between the street and our property. At the points where the posts are to be concreted in, no concrete has been poured yet. At these points, we can still drill through the masonry stones into the ground, and here I could still drive steel braces into the ground.

My question now is whether this is sufficient, as the 1.80 meter fences already have a large surface area and should therefore stand stable.
Thanks in advance for your answers.

So the construct is not completely clear to me yet, but if you only want to push steel struts into the ground, then it probably won't hold. The fence + the wall will hardly be able to withstand the wind pressure, depending on the wind direction and strength. It basically only stands on the gravel afterwards and would be "anchored" at most by steel struts in the ground. If anything, you would have to set foundations in that area, then it might work. By the way, you should check whether you are even allowed to make the fence 1.80m high. If your property is higher, you would end up with a total height of 2.30 + x.

I took a few pictures because it will surely be easier to understand. The idea is to drill a little further into the holes. The height should not be a problem since the bricks are almost at street level.

Yes, you now have to drill 80cm deep and pour concrete in. Ideally, put steel in as well.

Ah ok!

So I would first clarify the height, as there are quite often regulations that allow less than 2/1.80m especially in public spaces. But honestly, if you now basically just embed the posts into the wall, which only stands on gravel, right? Then the whole thing becomes borderline, even if you drive some steel into the ground, when the wind presses the fence from the street side with higher force. I think you would need proper foundations for it to really hold, but I currently lack the imagination on how to produce them now. Unless you can deepen these "hollow areas" accordingly and thus create foundation "piles".

Unless you can deepen these "hollows" accordingly and thus create foundation "piles."

It’s hardly possible, the stones are not particularly large and you certainly cannot get proper tools in there. The question should have been asked by the OP before they stacked and filled the stones, because in my opinion they must be removed again, a foundation underneath (semi-rigid made of gravel + concrete should suffice) and then everything rebuilt. Fill the stones at the posts with reinforcing steel and concrete, otherwise gravel is enough. If you just cobble something together now, I see the entire structure lying in the garden or on the street during the first storm. It’s not only the pressure on the fence, it also exerts a fairly large lever on the posts which in turn are only held by the stacked stones and whose gravel is probably not properly compacted either (you can’t get heavy equipment in there).