Polygonal or round lighting poles: which one should you choose?

Two types of metal lighting poles are widely used today: round and polygonal lighting poles. At first glance, the main difference may seem to be their appearance. However, the shape of the pole affects its structural capabilities, especially when dealing with significant heights, multiple lighting fixtures, or additional equipment.

Let us take a closer look at the main differences between round and polygonal lighting poles and explain when each type can be the right choice for a particular project.

What is the difference between round and polygonal lighting poles?

The main difference between these two types of lighting poles is the shape of their cross-section and the way the pole shaft is formed.

Round lighting poles have a circular cross-section. They can be manufactured using different technologies. For relatively low heights, a common solution is a steel tube with a specified diameter and wall thickness. Another option is a round tapered pole with a diameter that gradually decreases toward the top.

Round lighting poles are widely used for street lighting, parks, residential developments, industrial sites, public areas, and other facilities.

Polygonal lighting poles have a shaft consisting of several flat faces. They are manufactured from sheet steel, which is formed into the required geometry using specialized bending equipment. Polygonal poles are generally tapered, with the cross-sectional dimensions gradually decreasing from the base toward the top.

One of the main advantages of polygonal lighting poles is the flexibility they offer in defining the shaft geometry according to the technical requirements of a project. The pole can be designed with specific cross-sectional dimensions, steel thickness, and number of faces.

This flexibility is particularly useful for tall lighting poles, structures carrying multiple floodlights, and poles equipped with additional equipment.

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What determines the strength and reliability of a lighting pole?

Does this mean that a polygonal lighting pole is stronger than a round one? Not necessarily.

Both types of poles can provide the required strength and stability when properly designed for the intended operating conditions. Therefore, comparing lighting poles based on their shape alone would be incorrect.

The load-bearing capacity of a lighting pole depends on several factors, including:

• pole height;
• shaft geometry;
• steel grade and thickness;
• mounting method;
• type and weight of lighting equipment;
• wind load;
• arrangement and surface area of the installed equipment.

For example, a pole carrying a single lighting fixture and a pole of the same height carrying four floodlights may require completely different structural solutions.

The weight of the equipment is only one factor. The surface area exposed to wind and the position of the equipment on the pole also have a significant impact on the required structural characteristics.

Why is a tapered shape important?

For tall lighting poles, the distribution of loads along the shaft is particularly important.

Wind pressure and the weight of the installed equipment create bending forces in the structure. These forces are generally greatest near the base of the pole. As a result, the lower section requires greater load-bearing capacity than the upper section.

A tapered design makes it possible to account for this load distribution by providing a wider and stronger base while reducing the cross-sectional dimensions toward the top.

This allows the amount of steel to be used more efficiently while maintaining the required structural strength.

It is important to note that both round and polygonal lighting poles can have a tapered design. However, the manufacturing technology used for polygonal poles provides considerable flexibility when adjusting their geometry to specific design requirements and loads.

Height, transportation, and installation: when does pole shape matter?

For standard low-height lighting poles, the difference between round and polygonal designs may be relatively small. Both solutions can provide the required performance when correctly designed and selected.

The situation becomes different when a project requires tall lighting poles or structures carrying significant loads.

In such cases, it is important to consider not only structural strength but also the overall dimensions of the product, transportation requirements, and installation conditions.

Sectional lighting poles for tall structures

Transporting and installing a tall lighting pole as a single piece is not always practical. For this reason, tall structures can be designed as several sections.

For tapered polygonal lighting poles, one common solution is a telescopic connection. During installation, the upper section is fitted over the lower section, creating a secure connection between the elements.

This solution helps reduce the transportation length of individual sections and allows the structure to be assembled directly at the installation site.

Sectional construction is particularly useful for:

• tall lighting poles;
• floodlight masts;
• flagpoles;
• other large-height steel structures.

For standard low-height lighting poles, however, sectional construction is usually unnecessary.

Are the installation methods different?

Both round and polygonal lighting poles can use similar installation methods.

Flange-mounted installation. The pole is secured to an anchor assembly installed in the foundation. This solution allows the structure to be dismantled or replaced if necessary without damaging the foundation.

Direct-burial installation. The lower part of the pole is installed in a prepared foundation excavation and then secured with concrete.

Therefore, the installation method primarily depends on the structural design of the pole and the project requirements rather than on the shape of its cross-section alone.

Which lighting poles are more cost-effective: round or polygonal?

Cost is an important factor when selecting lighting poles. However, the lowest price of the pole itself does not necessarily mean the lowest overall project cost.

A proper comparison should take into account not only manufacturing costs but also:

• corrosion protection;
• transportation;
• foundation requirements;
• installation;
• additional equipment and accessories.

For low-height lighting poles with standard loads, a round tubular pole can be an economically efficient solution.

For tall lighting poles or structures carrying additional equipment, a polygonal design can provide more opportunities to optimize the shaft geometry and steel consumption. This can affect not only manufacturing costs but also transportation and installation expenses.

At the same time, a polygonal lighting pole is not necessarily lighter or less expensive than a round pole.

To make an objective comparison, both options should be engineered for the same operating conditions, height, equipment configuration, and loads.

Round or polygonal lighting pole: which one should you choose?

There is no universal solution for every outdoor lighting project. The right choice depends on the purpose of the facility, required pole height, number and type of lighting fixtures, wind conditions, installation method, and other technical requirements.

Criterion	Round lighting poles	Polygonal lighting poles
Shaft shape	Round, cylindrical, or tapered	Polygonal, usually tapered
Standard low-height structures	Often a practical solution	Also suitable
Tall structures	Possible with appropriate engineering	Well suited to customized designs
Customized geometry	Depends on manufacturing technology	Wide range of customization options
Load optimization	Possible	High flexibility for optimization
Sectional construction	Possible	Possible with telescopic or flange connections
Corrosion protection	Hot-dip galvanizing available	Hot-dip galvanizing available
Cost	Depends on design and configuration	Depends on design and configuration

 

When is it better to choose round lighting poles?

Round metal lighting poles are a practical option for standard outdoor lighting systems where there is no need for complex shaft geometry or specialized sectional construction.

They can be used for:

• parks;
• residential complexes;
• pedestrian areas;
• local roads;
• public spaces;
• sites with standard lighting requirements.

If a round lighting pole meets the calculated loads and project specifications, it can be an efficient and cost-effective solution.

When are polygonal lighting poles a better choice?

Polygonal lighting poles are particularly suitable for projects that require:

• significant pole height;
• several lighting fixtures or floodlights on a single pole;
• customized shaft dimensions;
• optimized structural weight;
• sectional construction for easier transportation and installation;
• adaptation to specific wind and equipment loads.

Such solutions are used for road and highway lighting, industrial sites, transport infrastructure, sports facilities, large public areas, and other projects.

At the same time, polygonal lighting poles are also suitable for parks, pedestrian areas, residential developments, and other urban spaces. Their use is not limited to tall or industrial structures.

The key is not to choose a pole based on its shape alone, but to select a structure that meets the technical requirements of the project and provides an economically efficient solution.

How to order lighting poles from EF

EF specializes in the design and manufacture of metal lighting poles for a wide range of outdoor lighting applications.

Our engineers help determine the required characteristics of the structures based on the specific requirements of the facility, lighting equipment, installation conditions, and expected loads.

For an initial assessment, you can provide us with the following information:

• the location and type of facility;
• the required pole height and quantity;
• the number of lighting fixtures installed on each pole;
• information about any additional equipment;
• technical specifications or drawings, if available.

Based on the provided information, our specialists can determine the required parameters, perform the necessary engineering calculations, and propose an appropriate structural solution.

Contact EF to receive professional advice and a cost estimate for lighting poles for your project.