Bollards Installation Guide

Installing bollards correctly is essential for ensuring long-term performance, safety, and structural integrity. Whether you are working with bolt-down or dig-in bollards, following industry best practice is key to achieving a secure, durable installation. This guide outlines the recommended approaches, common pitfalls to avoid, and practical factors such as fixing types, depths, and curing times before bollards are ready for safe use.

Choosing the Right Installation Type

Before work begins, it is important to select the correct installation method for your site conditions:

Bolt-down bollards are suitable for concrete surfaces with adequate depth and strength. They are ideal for locations where excavation is restricted or where a fast, clean installation is required.

Dig-in (root-fixed) bollards provide enhanced strength and are preferable for soft ground, tarmac, or areas requiring deep structural anchoring. They are the recommended choice for high-impact protection.

Installing Bolt-Down Bollards

Bolt-down bollards rely on fixings that secure the flange plate directly to the surface. Proper preparation and execution ensure the bollard performs as intended.

Surface Preparation

Only install bolt-down bollards on sound, level concrete. The substrate should have no cracks or weak points, as these can undermine the strength of the fixings. A concrete thickness of at least 150 mm is generally recommended to ensure secure anchoring.

Fixing Types

Use high-quality anchor bolts suitable for the load requirements typically M10 or M12 through-bolts or shield anchors rated for structural applications. Stainless steel fixings are advisable for durability and corrosion resistance.

Installation Process

1. Position the flange and mark hole locations accurately.
2. Drill the fixing holes perpendicular to the surface to avoid misalignment.
3. Remove dust from the holes to ensure proper fixing grip.
4. Insert the bolts and progressively tighten them to avoid stressing the plate unevenly.

Do’s and Don’ts for Bolt-Down Bollards

• Do verify the concrete depth before drilling.
• Do torque fixings to the manufacturer’s guidance.
• Don’t install on block paving unless a reinforced pad is added.
• Don’t overtighten bolts, as this may crack the concrete or distort the base plate.

Once installed, bolt-down bollards are typically ready for light use immediately, although any load-bearing or protective use should only begin once all fixings have been thoroughly checked.

Installing Dig-In Bollards

Dig-in bollards provide increased stability and impact resistance through a rooted section embedded into the ground. This method is commonly used in high-traffic or security-sensitive areas.

Excavation Depths

The depth of the foundation hole depends on the bollard height and loading needs. A common practice is to install the bollard with 400–600 mm of root depth, set within a concrete foundation. Wider or deeper foundations may be required for heavy-duty models.

Concrete Requirements

A strong concrete mix such as C20/C25 is typically recommended. The foundation hole should be filled around the bollard to create a monolithic block. Ensure the bollard is plumb and aligned while the concrete is still workable.

Curing Time

Concrete foundations generally require 24–48 hours to cure sufficiently for the bollard to become stable. In colder weather, curing may take longer. Heavy impacts or protective demands should be avoided until full cure is achieved, normally after 7 days.

Do’s and Don’ts for Dig-In Bollards

• Do ensure the hole is deep and wide enough for the foundation size recommended by the manufacturer.
• Do brace the bollard during curing to maintain correct positioning.
• Don’t allow foot or vehicle traffic near freshly poured concrete.
• Don’t backfill with loose soil or gravel instead of concrete; it will not provide adequate strength.

Bollard Installation Guide – General Installation Best Practice

Regardless of the installation method, several considerations apply to all bollard types:

• Check for underground services before digging or drilling.
• Use protective equipment and follow site safety guidance.
• Ensure visibility and access when positioning bollards to avoid obstructing pedestrian routes or emergency access.
• Seal exposed edges or bolt heads where applicable to prevent corrosion.
• Inspect all installed bollards regularly, especially those in high-impact environments.

When Is the Bollard Safe for Use?

• Bolt-down bollards are usually ready for immediate use once fixings are secured and inspected.
• Dig-in bollards require the concrete to set. Light interaction is generally acceptable after 24–48 hours, but full protective performance should only be expected after complete curing, usually around one week.

A careful approach to installation ensures bollards deliver long-term reliability, structural strength, and safety. By following best practice for both bolt-down and dig-in options, you can ensure each unit performs its intended function effectively, whether for guiding traffic, protecting assets, or enhancing site security.