A height-restriction barrier (also known as a height limit barrier or car park height restrictor) is a steel access control system designed to prevent vehicles above a certain height from entering a site. It’s commonly installed at entrances to car parks, retail parks, industrial estates, service yards, and restricted access areas.
How it works:
A height-restriction barrier consists of upright steel posts supporting a horizontal crossbeam set at a fixed height. Any vehicle taller than this clearance will be physically stopped from passing through, protecting the site from potential damage.
- The clearance height is measured from ground level to the underside of the crossbeam
- A reflective height sign (RA1/RA2) is attached to clearly display the maximum permitted height
- Many barriers also include hanging nudge bars or chains, which lightly contact taller vehicles first to warn the driver before reaching the main beam
Common types:
- Fixed height barriers
Permanently set at a specific clearance (e.g. 2.1m or 2.4m) — ideal for continuous restriction where no taller access is required - Swing or hinged height barriers
Can be unlocked and opened to allow authorised taller vehicles (such as delivery vans or maintenance vehicles) to enter when needed
Installation options:
- Built-in (root-fixed) for maximum strength and durability
- Bolt-down (surface-mounted) for quicker installation where suitable foundations already exist
Key benefits:
- Prevents damage to overhead structures such as canopies, signage, or ceilings
- Controls vehicle access and deters unsuitable vehicles (e.g. HGVs, caravans)
- Improves safety in busy environments
- Enhances traffic management and site organisation
At Aremco Barriers, our UK-manufactured height-restriction barriers are built from heavy-duty galvanised steel and can be powder coated in any RAL colour for visibility and durability. Designed for long-term performance, they provide a reliable and professional solution for managing vehicle access across a wide range of sites.
