Bollard Supply and Installation
A bollard by definition is a ridgid protective device which is designed to provide a resistance to bending / deformation on impact with a vehicle which is normally in the shape of a small verticle post.
In the early days a bollard was used at docks in the shape of mushrooms and used in mooring ships. Bollards are now used for safety converns due to the force of an impact can be absorbed by a bollard, post or stanchion and a vehicle can be progressively decelerated to prevent further damage to the surrounding areas or people.
Rising Bollards are a great security device if you want to prevent vehicles following another in an attempt to gain access illegally.