If your metal posts have been set in buried concrete it s best to pull the concrete out with the each post and with mechanical help you can avoid excessive digging.
Removable post in concrete.
If you can have someone hold the post while you pour the concrete so your post doesn t move around.
The concrete should fill about to of the barrel to provide enough stability for the posts.
This pipe must remain empty of concrete with the bottom open to the ground below.
After the concrete is set 2 of coarse gravel is added inside the pipe to provide drainage.
So the ol pressure treated wooden post in a concrete footing.
Check if your post is plumb using a level.
Set planter barrel in place and mix the concrete in the barrel.
I m curious if i can make the post slide in an out of the hole with just enough give to be removable but tight enough to minimize looseness and sway to ease pole replacement as the wood wears out every several years.
Make sure this pipe is large enough to hold the removable post and 18 24 deep for stability.