Bollards are among the least glamorous things a highways team buys and among the most frequently replaced. They are struck by vehicles, sheared off, faded by years of sun, and dug out during works. The specification is usually inherited rather than written, and the supply arrangement is usually judged the first time a footway needs making safe and nothing is in stock.
The interesting part of bollard procurement is not the product. It is the two very different demand patterns a highways team has to serve from one contract, and the delivery arrangement that determines whether the depot can actually use what arrives.
This guide covers material choice, what to specify beyond dimensions, how to plan supply around damage replacement, and the delivery requirements that separate a workable contract from a frustrating one.
Two Demand Patterns, One Contract
Highways bollard demand splits cleanly, and a supply arrangement that serves only one half will disappoint.
Capital programme demand is plannable. A scheme is designed, quantities are known months ahead, and delivery can be scheduled against a production run. Lead time in weeks is entirely workable.
Damage replacement demand is not. A bollard is struck, a site is coned off, and the replacement is needed before the coning becomes a complaint. Here a lead time in weeks is a lead time in weeks of temporary traffic management.
The practical consequence is that stock policy matters more than headline lead time. Ask a prospective supplier what they will hold against your specific specifications rather than what their standard lead time is, because those are different questions and only one of them answers the damage replacement case.
Polymer or Concrete
Polymer bollards with a steel core have become the default for most urban applications for a specific reason: impact behaviour. A polymer bollard struck by a vehicle at low speed tends to deform and recover, or fail in a way that does not send fragments across a footway. Weight is another factor, with a typical unit light enough for two operatives to handle without lifting equipment, which changes the cost of every installation and replacement.
Concrete bollards are heavier by an order of magnitude and are chosen where mass is the point: preventing vehicle overrun, protecting a frontage, defining an edge that should not move. That mass is also the constraint. Handling becomes a manual handling and plant question, delivery requires offload capability, and a concrete unit struck hard is usually a full replacement rather than a repair.
Neither is a hostile vehicle mitigation product unless it is specifically rated as one. If the purpose is security rather than delineation, that is a different specification with impact testing behind it, and it should not be conflated with standard street furniture.
Specify More Than Dimensions
Most bollard specifications state diameter, above-ground height, below-ground depth and colour, and stop. That is enough to order the wrong thing.
Colour should be a precise reference rather than a description, because black is not a shade and matching an existing street scene matters. Where a highlight band, cap or ring is part of the local standard, specify its reference too. Reflectivity is a separate requirement and should be stated explicitly where the bollard is a delineation feature at night.
Fixing method needs to be explicit: below-ground fix, root depth, and whether removable versions with sockets are required. Removable bollards are a recurring need for access, events and maintenance, and retrofitting them later means digging out a fixed one.
Finally, specify total weight. It determines the manual handling assessment, the delivery method and whether a two-person team can install without plant.
Delivery Is Where Supply Contracts Fail
A highways depot is a working yard: vehicles moving constantly, a narrow delivery window inside a busy day, and access arrangements that differ from one visit to the next. That environment defeats a standard pallet network delivery, where the driver arrives when the route allows and expects a forklift and a person to meet them.
Specify the delivery arrangement as explicitly as the product. Delivery within stated hours, to an agreed rota, with changes notified and agreed in advance rather than discovered. Drivers who offload and place goods where the yard directs, and who stay flexible about access on the day.
Specify packaging removal as part of the delivery. Pallets and wrapping accumulating in a depot yard become a waste handling cost and a housekeeping problem, and disposing of a supplier's packaging is not a job a highways team should inherit. It also supports sustainability commitments, since packaging taken back can be reused or recycled rather than entering the authority's waste stream.
Where deliveries may be needed to sites other than the main depot, say so in the specification rather than raising it as a variation later.
Quality, Inspection and Getting It Put Right
Product should be inspected on arrival against the specification, covering dimensions, material and colour reference, with non-compliance recorded photographically and raised immediately. The supplier then rectifies or replaces at their cost, on a stated timescale.
What makes this work is agreeing the inspection standard before the first delivery. Finish and colour are where reasonable people disagree, and a specification with precise references settles most disputes before they start. Agreeing who inspects, against what, and what evidence is required removes the rest.
Set the after-sales commitment in working days rather than in best endeavours, covering both resolution of an issue and dispatch of replacements. A named contact with a named deputy prevents the common failure where a depot is held up because one person is on leave.
Emissions, Consolidation and Social Value
Authorities working towards net zero targets increasingly score the emissions standard of delivery vehicles and give credit for cleaner or electric ones. The honest answer to that question names the vehicles that will actually run the contract rather than describing a fleet in general.
Consolidation usually does more for the total than any individual vehicle's rating. Fewer, fuller, scheduled loads reduce journeys, and journeys are what produce emissions. That is worth writing into a specification as a delivery requirement rather than leaving to the supplier's discretion.
On social value, a supply and delivery contract has genuine levers: local employment and spend, and the measurable environmental gains from consolidated delivery and returned packaging. Commitments should be reported alongside contract KPIs rather than described once at tender stage.
Where This Sits in What We Do
The Wild Axis Group provides street bollard supply and delivery for UK councils and public sector organisations. If you are working through a specification or a procurement and want a straight answer on what is realistic, we are happy to have that conversation before there is anything to quote for.
Frequently Asked Questions
How much of a bollard should be below ground?
Root depth is driven by the bollard type, its diameter and the ground it is going into, and specifications commonly work to a few hundred millimetres for standard street bollards. What matters more than repeating a figure is that the depth in the specification matches the fixing method and the substrate actually present. Older footways frequently have services, previous foundations or made ground that the drawing does not show, so it is worth confirming the installation method separately from the product specification.
Are removable bollards worth specifying?
Usually yes, for a proportion of the stock. Access requirements arrive repeatedly and unpredictably: events, deliveries, maintenance vehicles, emergency access. Retrofitting removable units means digging out fixed ones, at which point the cost is the excavation and reinstatement rather than the bollard. Specifying removable versions with sockets at locations where access is foreseeable is cheaper than converting later, and the sockets should be specified alongside the bollards rather than assumed to be included.
What causes bollards to fail in service?
Vehicle impact is the obvious one and the reason polymer with a steel core has become standard in urban settings. Beyond impact, the common failures are corrosion at the ground interface where water sits, degradation of colour and finish under UV, and failure of the fixing rather than the bollard, particularly where the original installation was into poor substrate. Colour fade is the one most often ignored and most visible, since a street scene where a third of the bollards have faded looks neglected even where every one is structurally sound.
How should a council plan bollard stock levels?
From damage history rather than from programme forecasts. Most authorities have a reasonably stable annual rate of impact replacements, concentrated on particular locations, and that rate is the base level worth holding or having held by the supplier. Programme requirements sit on top and can be scheduled. The question to put to suppliers is what they will hold against your specifications and how quickly they can replenish it, because a supplier holding your stock is the difference between a same-week replacement and a coned footway.
Should bollard supply and installation be procured together?
It depends on whether the authority installs its own. Where a highways team has crews doing reinstatement work anyway, supply-only is usually more efficient and cheaper, and the delivery arrangement becomes the critical part of the contract. Where installation is contracted out, combining supply and installation removes the interface where a delayed delivery becomes a wasted crew visit. What matters most is that the split is deliberate and that responsibility for making the site safe is unambiguous.
What documentation should come with a bollard delivery?
A delivery note that matches the order line by line, so inspection can be against a document rather than a recollection, and any product certification or conformity information the specification requires. Where colour and finish are specified by reference, having the reference on the paperwork removes an argument. For contracts with sustainability requirements, information on packaging recyclability and the arrangement for pallet return should be documented once at mobilisation rather than repeated on every delivery.