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Street lighting columns
Steel or Concrete Lighting Poles: Comparison
Lighting poles are made of steel or reinforced concrete. The material affects the pole’s weight, installation, appearance and durability. Below we compare the two on these points to make the choice easier.
Contents
Comparison by key characteristics
| Parameter | Steel multi-sided pole | Reinforced concrete pole |
|---|---|---|
| Weight | lower for the same height and load | higher — needs more powerful lifting equipment |
| Transport | more compact, easier logistics | bulkier and heavier, more expensive transport |
| Installation | faster due to lower weight, less load on the foundation | slower, a heavier foundation is needed for the greater weight |
| Impact and chip resistance | does not chip, deforms rather than fracturing in a brittle way | can chip and expose the rebar on impact (e.g. a vehicle collision) |
| Corrosion / rebar deterioration | corrosion protection (hot-dip galvanising) protects the steel | the rebar inside can corrode unnoticed if the protective concrete cover is damaged |
| Appearance | smooth, compact shape, can be painted any colour | typical concrete-shaft look, painting is less practical |
| Repairing damaged protection | local repair of the zinc coating or paint | harder — the concrete and rebar protection need repair |
This is a general comparison — for a specific project the final choice depends on the wind region, appearance requirements, budget and the installation equipment available.
How the poles behave over the years: service life, frost and de-icing salts
The difference between the materials shows after a few winters, not on the day of installation. The effect of the environment on reinforced concrete is described by the European standard EN 206 through exposure classes: carbonation (XC), chlorides (XD, or XS in a marine environment) and freeze-thaw (XF). For a steel pole, the guidance by corrosivity category is given in the article Hot-dip Galvanising Service Life.
| Parameter | Steel multi-sided pole | Reinforced concrete pole |
|---|---|---|
| What determines service life | the zinc coating and the environment; the coating can be renewed or topped with paint | concrete quality, the cover over the rebar and the environment; lost cover is restored with repair mortars |
| Freezing and thawing | steel and zinc are not sensitive to freeze-thaw cycles; for cold regions the steel grade is chosen to suit the design temperature | water in the concrete pores expands as it freezes; without enough frost resistance the surface scales |
| De-icing salts | salts speed up zinc loss near the base; a duplex coating and maintenance reduce the risk | chlorides reach the rebar and start its corrosion |
| Most vulnerable zone | the lower part at ground level and the flange, where moisture collects; the buried part is harder to inspect, so the ground-line zone is protected with bitumen varnish or another coating | the lower part at ground level and chipped spots where the rebar is exposed; corrosion under the concrete is noticed only when the cover has already cracked |
These are general patterns, not an assessment of a specific pole: the outcome depends on manufacture, the environment and maintenance.
How to compare life-cycle cost
The price of the product is only one cost item. Take the same height, the same luminaire load and the same calculation period, then add up the costs for each option:
- product and transport: compare poles of the same load capacity, not just the same height; weight and length determine the number of trips;
- foundation and installation: a steel pole is fixed by its flange to a foundation with an embedded part or set in a drilled pit, while a concrete pole is mostly set in a pit; include the whole scope of work, not just the product (see Lighting pole foundations and ways of fixing);
- operation: inspections, care of the coating or the concrete, repair of minor damage;
- accidents and end of life: replacement after a vehicle strike (poles near the carriageway may be checked for passive safety to the EN 12767 standard, whatever the material), lighting downtime, dismantling and further use of the material.
The lowest purchase price does not always give the lowest total cost, but for a temporary site or a short planning horizon it may well be the right choice.
When steel poles are chosen
Steel multi-sided poles are chosen where compact transport and fast installation matter, where the site’s appearance matters (parks, streets, squares), and where a non-standard colour or shape is needed. Corrosion protection (hot-dip galvanising to DSTU EN ISO 1461:2024) gives a long service life without visible corrosion when properly maintained.
A steel pole is worth considering first of all when:
- the pole is tall or carries many luminaires, and the diameter and wall thickness must be selected to suit the wind region;
- access for heavy equipment is limited and the schedule for the work is tight;
- brackets, cameras or solar panels will be added to the pole later: holes and cable entries are shown on the drawing;
- the pole may be relocated: on a flange it is unbolted and the foundation stays.
We make steel multi-sided poles: we bend the sheet on a press, weld the longitudinal seam and galvanise the poles in our own bath of 13,000 × 1,600 × 3,200 mm (length × width × depth), and we check the metal, the welds (including by ultrasonic testing) and the zinc thickness. The series are on the page Lighting poles, and the requirements for steel, welding and coating are in the article Technical Requirements for Street Lighting Poles.
When concrete poles are chosen
Concrete poles are traditionally used where their material cost is lower than that of steel for comparable requirements, and where the weight and more complex logistics are not critical. One example is a site already set up with equipment for installing concrete poles.
Concrete poles are justified when:
- luminaires are hung on the poles of an overhead line that has already been built with concrete poles;
- many identical low poles are needed, the pole manufacturer is nearby, and there are almost no appearance requirements (rural roads, utility or industrial areas);
- the calculation for a specific site really shows a lower total cost over the chosen period.
Even then, check the concrete class and the cover for your conditions, and compliance with the requirements of DSTU EN 40-4 for concrete lighting columns. We make steel poles, so where concrete is justified, we say so directly. To compare options for your site, send the pole height, loads, wind region and site conditions via the Contact page.
Updated:
Lighting pole material: frequently asked questions
Which poles are lighter, steel or concrete?
Steel multi-sided poles are lighter for the same height and load, which simplifies transport and installation.
Which poles are more durable?
With proper corrosion protection (hot-dip galvanising) and maintenance, steel poles last a long time without visible corrosion. Concrete poles are durable as long as the protective concrete cover over the rebar is not damaged.
Can a pole be painted in a specific colour?
A steel pole can be painted any colour over the hot-dip galvanising (by special order). Painting is less practical for concrete poles.
Is a concrete pole always cheaper than a steel one?
No, it depends on what is being compared. The concrete pole itself may cost less, but the total cost is affected by transport, the base, installation, maintenance and replacement after damage: see the section on life-cycle cost.
Which withstands frost and de-icing salts better?
Steel and zinc are not affected by freeze-thaw cycles, but salts speed up zinc loss near the base, so that zone is protected additionally, for example with a duplex coating. Reinforced concrete needs a frost-resistant mix and sufficient cover: otherwise the surface scales and chlorides reach the rebar.
Can concrete poles be replaced with steel ones at an existing site?
Technically yes, usually with a new base: a steel pole is fixed on a flange to a foundation with an embedded part or set in a drilled pit, and the height and loads are checked by calculation. See Flanged or Direct-buried Lighting Poles.
Related products: Street lighting columns · High-mast lighting
More on this topic: Street Lighting Norms: Categories A, B, C under DBN V.2.5-28:2018 · Flanged or Direct-buried Lighting Poles: Which to Choose · Lighting Pole Marking: PMO, UMO, DMO, OGK, NFG — Finding an Equivalent · Lighting Column Dimensions and Tolerances under EN 40-2: Heights, Brackets, Hatches, Flanges · Lighting Pole Height and Mass 3–12 m: Table by Range · Lighting Pole Selection Calculator: Height, Series, Spacing and Number of Poles
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