Access Control Systems

Height restriction barriers are one of the most effective ways to control vehicle access and prevent damage caused by over-height vehicles. From supermarket car parks and retail parks to industrial estates and warehouse entrances, these barriers help stop vans, HGVs and other tall vehicles from entering areas where overhead clearance is limited. In this guide, we explain everything you need to know about height restriction barriers, including common barrier heights, where they are used, and how to choose the right barrier for your site. What Is a Height Restriction Barrier? A height restriction barrier is a steel structure installed at the entrance to a car park, yard or access road to prevent vehicles exceeding a certain height from entering. These barriers typically consist of two vertical steel posts supporting a horizontal beam set at a defined clearance height. Vehicles taller than the specified height will be unable to pass beneath the barrier, preventing them from entering the r...