[davidb56]

Bollard is not rebar. Its a rigid structure, usually pipe or I beam stood up in a concrete foundation to prevent damage or entry from vehicles or foot traffic. Rebar is not considered rigid, and is used only for enforcing concrete. Your info source is incorrect.

[Company Man]

The guys at We Build The Fence ran twin rebar inside the square bollard pipes, then filled that with concrete, making it virtually impenetrable.