Flexible bollard installation

What is it?

What are flexible impact-recoverable bollards?

A flexible bollard is a post made from polyurethane or another resilient polymer, or mounted on a sprung base, that bends over when struck by a vehicle and returns upright afterwards. It guides and separates traffic without damaging the vehicle or itself in a typical low-speed knock. Flexible bollards are traffic management products, not barriers, and will not stop a vehicle that is driven at them.

In car parks, depots, bus stations and service yards, drivers clip posts constantly. Rigid steel bollards in those positions get bent, crack their foundations and scratch every vehicle that touches them, and the repair bill for both builds up. Flexible bollards take the opposite approach: they mark the edge clearly, give way under impact and spring back, so the line stays in place and nobody's bumper is ruined.

They suit places where the aim is to guide drivers rather than physically stop them: lane dividers, entry and exit splits, the edges of pedestrian routes inside car parks and the approaches to barriers and pay stations. Our installation crews, working under our management, fit surface-mounted and socket-based flexible posts, and we are clear about the places where a rigid post is still the right answer.

Where flexible bollards make sense

• Lane separation at car park entrances and exits
• Approaches to barriers, pay stations and ticket machines
• Depot and yard routes where vehicles knock posts daily
• Marking pedestrian routes inside multi-storey car parks
• Bus stations and coach parks
• Drive-thru lanes and fuel forecourts
• Temporary or trial layouts before permanent kerbs

How it works

Two designs dominate. Solid or hollow polymer posts flex along their length and recover their shape because the material itself has memory. Sprung-base posts are stiffer, often steel or rigid plastic, mounted on a heavy spring or elastomer joint at ground level so the whole post tilts over and returns. Polymer posts give a softer impact; sprung posts look more like conventional bollards and stand up better to wind and vandalism.

Either type is fixed to a base. Bolt-down bases are anchored to the slab or surface with resin anchors or through-bolts. Socket bases are set flush in the ground, and the post plugs into them, which means a damaged post can be swapped quickly without disturbing the fixing. On car park decks, low-profile bases avoid drilling deep into the structure.

A flexible bollard's recovery depends on the impact. It is designed for the glancing blows and low-speed bumps of everyday driving. A lorry running fully over a post, or a vehicle hitting it at speed, can tear the post or its base. Cold weather also makes polymers stiffer, so recovery is slower in winter. Spacing also changes how the line reads. Posts set close together look like a continuous edge and drivers respect them; posts spread too far apart look optional and get driven between, which defeats the purpose of a lane divider.

Options and finishes

Typical specification

How we install it

Ground, foundations and buried services

Flexible bollards put repeated load on their fixings, because every knock rocks the base. Anchors therefore need sound concrete with enough edge distance; anchoring into thin, cracked or weak surfaces means the base works loose within weeks. On tarmac, a small concrete pad or a socket base cast in concrete is the reliable option. Multi-storey and rooftop decks are a special case: slabs may be post-tensioned or carry waterproofing and heating, so drilling depth and positions are agreed with the building owner and scanned first. Where posts go in a line across a drainage fall, positions avoid channels and gullies.

Rules and checks before you order

• Do not use flexible bollards where a physical barrier is needed to protect people or buildings; they guide rather than stop.
• Check drilling into car park decks or podium slabs with the building owner before fixing.
• On public highway, including cycle lane segregation, the highway authority's agreement and specification are needed.
• Keep pedestrian gaps and routes clear, referring to Inclusive Mobility guidance where people walk through the line.

See rules and standards by nation for highway consent, accessibility and security standards.

Maintenance

Check flexible bollards for splits, permanent bends and loose bases, and tighten or replace fixings that have worked loose. Clean reflective sleeves so they stay visible, and replace them when they fade or peel. Posts exposed to strong sunlight slowly lose flexibility and colour, and eventually crack; replacing the post on its existing base is usually quick. Keep a few spare posts on site where knocks are frequent, so a damaged one can be swapped before the line develops a gap. After resurfacing or line repainting, check that the bases were not disturbed or painted over, and that posts still line up with the new markings.

What affects the price

• Polymer posts or sprung-base bollards
• Number of posts and length of line
• Bolt-down or socket base
• Surface condition and need for concrete pads
• Deck scanning and restrictions on drilling
• Out-of-hours working in busy car parks