This new Anti Terrorist Bollard, has been designed with the added advantage that the slipper box (or post socket box) can be moved separately and is not rigid. The box can be swivelled around a corner of 90 degrees or more if needed and can adapt to an up and down slopping surface without having to change the box design.
Tested as an array of triple bollard
Rated Diameter of oval shroud of 300x240mm to cover internal spring of 200×200