alternatively just build them dry and fill the hollow with a cement and coarse aggregate mix
If you build a 13 inch square pier there will be a 4 inch square hollow in the middleBricks don't have a hollow...
If you build a 13 inch square pier there will be a 4 inch square hollow in the middle
13 inch piers are standard though and not terribly heavy
Bricks don't have a hollow...
There's a few holes in theses ones Leo.![]()
They are when properly bonded on a suitable foundation. With the suggested concrete infill, such a pier will weight in at 200+kg for a 1m height unless using leightweight blocks. Not something you'd want falling over with children about.