What is a security bollard?

A security bollard is a short, vertical post designed primarily to resist vehicle impact. In security applications it is usually manufactured from heavy-gauge steel, stainless steel or sometimes reinforced concrete, and fixed into or onto a concrete slab or foundation. Unlike purely decorative street furniture, security bollards are engineered so that impact loads are transmitted safely into the ground rather than into the asset behind them.

Security bollards can be static (fixed in place), removable, telescopic or automatic rising. For higher-risk sites, many products are “crash-rated” and tested to standards such as PAS 68 and IWA 14-1, which measure how well a bollard or barrier can stop a vehicle of a given mass at a given speed.

In everyday retail, commercial and industrial settings, non-rated but robust steel bollards are widely used to deal with low to moderate impact risks, such as slow-moving cars, delivery vehicles and forklifts.

Security bollards for retail shop fronts

Retail shop fronts, particularly those with large glazed façades and valuable stock, are vulnerable to ram-raiding and accidental collision. A line of security bollards installed between the carriageway or car park and the shop front creates a physical barrier that prevents a vehicle from reaching the façade, even if the glazing or doors are unprotected.

Typically, bollards are placed along the kerb line or just back from it, with spacings small enough to block vehicles but wide enough for pedestrians, shopping trolleys, wheelchairs and prams to pass comfortably. This is usually achieved by ensuring clear gaps smaller than the narrowest vehicle track width but greater than standard accessibility requirements. The bollard height is chosen to be clearly visible from a driver’s eye level and to stand out against the shop front, often helped with reflective banding / stripes or contrasting finishes for night-time and poor-weather visibility.

Where aesthetics are important, for example in high-street or shopping-centre environments, bollards can be finished in brushed stainless steel, coated in corporate colours, or integrated with lighting. The security function remains the same: to arrest the vehicle before it can reach the glass, frames and roller shutters.

Separating pedestrians and vehicles in car parks

Car parks are environments where vehicles turn, reverse and park in close proximity to pedestrians. Here, the security function of bollards is focused on safety and segregation rather than anti-terror or extreme ram-raid threats.

Bollards placed along pedestrian routes, in front of building entrances and at the edge of footpaths clearly define safe walkways while physically preventing vehicles encroaching into these zones. By narrowing vehicle routes and visually reinforcing kerb lines, bollards also act as a traffic-calming measure, helping to reduce vehicle speed and improving driver awareness of pedestrian priority.

Impact-protection bollards in car parks are often high-visibility, using bright powder-coated or striped finishes so that they are seen early and clearly from a driver’s perspective. This is particularly important around payment machines, EV chargers, accessible parking bays, fire exits and escape routes, where damage or obstruction could have significant safety consequences.

Protecting commercial building frontages from ram-raiding

Larger commercial premises such as offices, banks, showrooms and critical infrastructure buildings may be at risk not just from opportunistic ram-raiding but also from hostile vehicle attacks. In these applications, security bollards provide a controlled stand-off distance between vehicles and the building envelope.

Crash-rated bollards tested to PAS 68 or IWA 14-1 are frequently specified for such locations. These standards use controlled impact tests to verify that a bollard can stop a vehicle of known mass at a specified speed, and record penetration distance and debris spread.

When correctly arranged, such bollards can form a continuous hostile-vehicle-mitigation (HVM) line across the building frontage, while allowing free pedestrian access and maintaining an open architectural feel.

The design of the bollard line around entrances is critical. Emergency services access, delivery bays and accessible entrances all need to be accommodated, often using removable or automatic bollards in specific locations, combined with static bollards elsewhere. The aim is to maintain security performance without compromising day-to-day building operation.

Warehouse and distribution buildings

Warehouses, logistics hubs and distribution centres often have large areas of exposed structure and building services that are vulnerable to impact from HGVs, yard shunters and forklifts. In these environments, security bollards are used to protect the building fabric and operational assets, rather than primarily to stop criminal vehicle attacks.

Heavy-duty bollards positioned at the corners of buildings, along dock leveller frames, around loading bay door reveals and in front of structural columns absorb vehicle impact and prevent direct damage to the structure. This reduces the likelihood of serious incidents involving frame misalignment, cladding damage or impact to fire exits and escape routes.

Internally, smaller-diameter or energy-absorbing bollards can be used at the ends of pallet racking runs, in front of control panels, and around sensitive machinery. These systems are designed to take repeated low-speed impacts from forklifts, helping to minimise repair costs, protect stock and maintain safe, uninterrupted operations

Other ways bollards provide security

Beyond the obvious applications at shop fronts, car parks and warehouses, security bollards are widely used to protect other vulnerable assets:

• They are deployed around gas meters, electrical switchgear, hydrants and utility kiosks so that a vehicle collision does not damage critical services.
• In public-realm schemes they define the edge of pedestrian-only areas, prevent pavement parking and safeguard outdoor seating, cycle parking and street furniture from encroaching vehicles.
• With the rise of electric vehicles, flexible or semi-rigid bollards are increasingly used to protect EV charging stations, where collisions are common due to tight manoeuvring spaces. These products are engineered to withstand impacts while limiting damage to both the bollard and the vehicle, and they often provide defined, high-visibility perimeters around chargers.
• In high-risk urban areas, coordinated bollard layouts around squares, stadiums, transport hubs and event venues provide a discreet but highly effective form of hostile vehicle mitigation, allowing free movement of crowds while preventing unauthorised vehicle access.

Bolt-down versus dig-in (cast-in) bollards

The way a bollard is fixed to the ground has a direct impact on its security performance. Two common fixing methods are bolt-down (surface mounted) and dig-in (root-fixed or cast-in).

Bolt-down security bollards

Bolt-down bollards are installed onto an existing concrete slab using mechanical or chemical anchors. The base plate is set out on the finished surface, holes are drilled to the required depth, and the anchors are tightened to clamp the plate to the slab. This method is quick, avoids deeper excavation and is ideal where services run close to the surface or where an existing high-quality slab is already in place.

The impact resistance of a bolt-down bollard is governed not only by the bollard itself but also by the thickness, reinforcement and condition of the concrete slab. In general, bolt-down options are well-suited to low and moderate-risk environments such as standard car parks, light industrial yards and internal warehouse protection, where vehicle speeds are low and typical impacts involve manoeuvring rather than deliberate high-speed attack.

Bolt-down also offers advantages in flexibility and maintenance: damaged bollards can be unbolted and replaced without disturbing the slab, and configurations can be altered if access requirements change over time.

Dig-in (root-fixed) security bollards

Dig-in bollards are installed into excavated foundations and set into concrete. A “root” or extended section of the bollard is buried below ground, and the concrete foundation transfers impact loads into a larger volume of surrounding ground. Depths and footing sizes vary with the product and its required performance, but are typically several hundred millimetres deep for standard protection and significantly deeper and wider for high-security, crash-rated systems.

Because impact forces are resisted by the embedded root and the mass of the foundation rather than just by anchors in a surface slab, dig-in bollards usually provide a higher level of resistance to vehicle impact. For PAS 68 and IWA 14-1 crash-rated bollards, the foundation design is an integral part of the tested system, and can include reinforced concrete pads, continuous beams or shallow-mount foundation units that spread the load horizontally where deep excavation is not possible.

This makes dig-in bollards the preferred choice for:

• frontages at risk of ram-raiding;
• sensitive commercial and public buildings requiring formal hostile-vehicle-mitigation;
• corners of warehouses or car parks where heavy goods vehicles manoeuvre close to the structure.

Although installation is more intrusive and may require service diversions, a correctly engineered dig-in installation provides a more robust, long-term solution where impact forces could be high.

Specifying security bollards effectively

To get the best from security bollards, the starting point should always be a risk and impact assessment. For low-risk retail or standard car parks, robust steel bollards fixed to a sound slab may be sufficient. For higher-risk commercial frontages or critical infrastructure, it may be necessary to specify crash-rated products certified to PAS 68 or IWA 14-1, with the foundation and layout designed in accordance with the tested configuration.

Key technical points to consider include the likely vehicle type and speed, stand-off distance from the asset, spacing and pattern of the bollards, required clear openings for pedestrians, cyclists and wheelchair users, and the need for removable or automatic bollards where authorised vehicle access is required. Visibility, night-time conspicuity and integration with lighting and signage also play an important role in real-world safety performance.

When these factors are addressed and the right fixing method is chosen, security bollards provide a highly reliable, low-maintenance means of protecting shop fronts, car parks, commercial buildings and industrial sites from vehicle threats, while maintaining an open and welcoming environment for legitimate users.