I wouldn t go less than 2.
Setting fence post next to retaining wall.
I m installing a 6 foot tall panel fence with posts every 72.
There is 42 of retaining wall above the footer.
Hello putting post in next to the wall should not be a problem providing the footings and wall are sound.
The post holes are in to the gravel at the top of the wall aka the top of the water draining system the adding of two posts into the gravel shouldn t change the effectiveness of the overall draining system and in addition they are located at the top of the retaining wall where the drainage is least important ack apr 29 at 14 37.
Installed 3 feet 0 9 m behind the block placing the fence or railing a minimum of 3 feet 0 9 m or further behind the wall is the preferred lo cation.
Thus there are two good reasons to step the fence back from the wall face.
And the wall is 8 thick.
Take a 8ft fence post dig a post hole 2ft next to retaining wall and butt the fence post against the retaining wall meaning the post will be in contact with retaining wall up to 2ft and pore concrete to fix the fence post next to wall.
The key is to consider the fence during the design phase of the wall project to ensure the retaining wall has an adequate amount of resistance to the additional force that the fence will apply.
Whether it is or isn t it would be a good idea not to place the fence posts directly behind the wall where they would be in the gravel layer.
But before you decide to put one up yourself learn how to.
Here the problem is fence post once side in contact with the retaining wall and other sides in.
If you take anything out of the side of the footing it would only be a small amount and when you back fill with concrete bring the concrete up level or above the footing.
Given the scale of the property i d say a 3 set back would work well.
Next gen post installation system the revolutionary fence post in retaining wall system allows metal or wood fence posts to be installed directly into a segmental retaining wall srw.