How to Build a Concrete Fence with Corners

Cutting Post Blocks to Make a Corner

AB Fence Corner

The AB Fence Corner Block makes the construction of a 90 degree corner easy. No special tools or cutting of blocks are required. When laying out the fence to include the corner and adjacent post locations, keep in mind the post spacing is slightly shorter than a panel without a corner post. This will eliminate cutting panel blocks later in the installation process.


For each corner location the center-on-center spacing needs to be reduced by 1.5 in. (38 mm). If AB Fence Corner Blocks are used on both ends of a panel, the center-on-center spacing is 3 in. (75 mm) shorter than if two AB Fence Post Blocks are used. See the AB Fence Tech Sheet #2005 additional information.


If AB Fence Corner Blocks are not available, or a custom angle is needed, two AB Fence Post Blocks can be miter cut to fit the desired angle.

Building with AB Corner Block

Building with AB Corner Block

Corner Block with Rebar Placement

Corner Block with Rebar Placement

Cutting Post Blocks to Make a Corner

Cutting Post Blocks to Make a Corner