How to Choose the Right Steel Bollard for Your Property — A South African Buyer's Guide

Whether you're securing a shopping centre car park, protecting a warehouse entrance, or keeping unwanted vehicles off your driveway, a steel bollard is one of the simplest and most effective solutions available. But with different shapes, sizes and mounting options on the market, choosing the right one isn't always straightforward.

This guide breaks down what you need to know before buying steel bollards in South Africa — from the difference between square and round profiles to when a fold-down model makes more sense than a fixed one.

What Is a Steel Bollard and What Does It Do?

A bollard is a short, sturdy steel post installed vertically into the ground. Its job is straightforward: control where vehicles can and can't go.

In practice, bollards serve four main purposes:

Traffic management — they guide vehicles through parking areas, loading zones and driveways, keeping traffic flowing in the right direction.

Pedestrian protection — installed along walkways, shopfronts and building entrances, bollards create a physical barrier between foot traffic and vehicles.

Access control — fold-down and removable bollards let you open and close vehicle access points without permanent barriers. Lock them upright when you want the area closed, fold them flat when you need vehicles through.

Property protection — positioned at building corners, around gas cages, near shopfronts or beside expensive equipment, bollards absorb the impact of a vehicle collision before it reaches what you're protecting.

Square vs Round Bollards: Which Profile Should You Choose?

Steel bollards come in two main profiles, and the choice between them comes down to your site and application.

Square bollards offer a clean, architectural look that works well in commercial properties, office parks and residential complexes. Their flat sides make them easy to mount signage, chains or reflective strips to. Common sizes include:

• 76mm square — a compact option for lighter-duty applications like residential driveways and pedestrian zones
• 100mm square — the most popular size for car park bollards, offering a good balance between visibility and strength

Round bollards are the heavier-duty choice, designed for sites where serious impact resistance matters. Their cylindrical shape distributes force more evenly on impact, making them better suited for high-traffic areas. Common sizes include:

• 165mm round (3mm wall) — suitable for standard car parks and commercial parking areas
• 193mm round (3mm wall) — a heavy-duty option for truck stops, warehouse yards and industrial sites where larger vehicles are present

Quick rule of thumb: if your site handles mainly passenger cars, square 100mm bollards will do the job well. If trucks, delivery vehicles or forklifts are part of the picture, go round and go bigger.

Fixed vs Fold-Down: How to Decide

Fixed bollards are permanently installed and don't move. They're the right choice when a barrier needs to be in place around the clock — protecting a building corner, lining a walkway, or permanently closing off a vehicle route.

Fold-down bollards hinge at the base plate and lock in the upright position with a padlock. When you need to let a vehicle through, you unlock them, fold them flat against the ground, and lock them again once the vehicle has passed. They're ideal for:

• Residential driveways where you want to block off parking but still need access
• Reserved parking bays in office complexes
• Gated entrances that need to open for deliveries at certain times
• Emergency access routes that must stay clear but shouldn't be open to general traffic

Fold-down models cost slightly more than their fixed equivalents due to the hinge mechanism and locking hardware, but the flexibility they provide makes them worth it in any application where access needs to change throughout the day.

What to Look for When Buying Steel Bollards

Not all bollards are equal. Here's what separates a bollard that lasts from one that rusts out within a year:

Material and finish — look for mild steel construction with a hot-dip galvanised finish. Galvanising coats the steel in a layer of zinc that protects against rust and corrosion, which is critical in South Africa's varied climate — from coastal humidity in Durban and Cape Town to Highveld thunderstorms in Gauteng. A galvanised bollard will outlast a painted-only bollard by years.

Wall thickness — the wall thickness of a tubular bollard determines how much impact it can take. For car park use, 3mm wall thickness is the standard. Anything thinner is best limited to pedestrian zones.

Base plate and fixings — a bollard is only as strong as the mounting that holds it down. Look for a welded base plate with pre-drilled bolt holes for anchor bolt installation into concrete. The base plate should be wide enough to distribute load without cracking the concrete surface beneath it.

Visibility — in any vehicle environment, bollards need to be visible. Yellow or red powder-coated tops, reflective tape, or reflective strips make a significant difference, especially in underground parking or areas with poor lighting.

Height — most car park bollards stand between 750mm and 1,000mm above ground. Shorter bollards work for low-speed areas; taller ones provide better visibility in busy car parks.

How Many Bollards Do You Need?

Spacing depends on what you're trying to achieve:

• Blocking vehicle access entirely: space bollards 1.2m apart (centre to centre). This prevents any passenger vehicle from passing through while still allowing pedestrians, wheelchairs and trolleys.
• Traffic guidance and lane separation: 1.5m to 2m spacing is typical, creating a clear visual and physical boundary without feeling fortress-like.
• Property protection (building corners, shopfronts): a single bollard or a pair at each vulnerable point, positioned 300–500mm from the structure they're protecting.

For a standard parking area, plan on one bollard every 1.2 to 1.5 metres along the perimeter you're protecting. A 30-metre shopfront, for example, would need roughly 20 to 25 bollards.

Bollard Installation: Bolt-Down vs In-Ground

Bolt-down bollards mount onto an existing concrete surface using expansion anchors or chemical anchors. This is the most common method for car parks, driveways and commercial sites because it doesn't require digging. Installation is quick — a competent installer can fit 10 to 15 bolt-down bollards in a day.

In-ground (embedded) bollards are set into a hole filled with concrete, with roughly a third of the bollard's length buried underground. This method provides maximum impact resistance and is used for high-security or high-risk impact zones. It requires more preparation and curing time.

For most parking and property applications, bolt-down installation with the right anchors into sound concrete is more than sufficient.

What Do Steel Bollards Cost in South Africa?

Pricing varies by size, type and finish. As a general guide for manufactured steel bollards:

Bulk orders for larger projects typically attract better pricing. If you need a custom height, finish or configuration, request a quote for bespoke fabrication.

Ready to Order?

Browse Archeva's full range of steel bollards, including square and round profiles, fixed and fold-down models. All our bollards are manufactured in South Africa from quality mild steel with galvanised finish options.

Need help choosing the right bollard for your project? Contact us for advice or a bulk quote.