Class 5 Wood Poles

What Is a Class 5 Wood Pole?

Class 5 wood poles may be used for lighting, communications, and utility projects with comparatively lighter structural loads. They generally have smaller minimum dimensions than Classes 1 through 4, which may reduce pole weight, shipping requirements, unloading demands, and excavation size when the approved design does not require a heavier pole.

A Class 5 designation does not identify one fixed pole size or confirm that the pole is suitable for a particular project. Wood species, overall length, taper, minimum dimensions, attachment height, equipment configuration, and environmental loading all affect structural suitability.

LED Lighting Supply offers wood utility poles and wood light poles in multiple classes and heights. Confirm the available species, treatment, dimensions, lead time, minimum order quantity, and supporting documentation before ordering.

When Is a Class 5 Wood Pole a Good Fit?

Class 5 may be appropriate when the approved loads exceed the capacity of Class 6 or smaller classes but do not require the larger dimensions of Classes 1 through 4. This can make it a practical option for lighter distribution, communications, and lighting projects where pole weight and installation logistics are important considerations.

Potential Class 5 applications include:

• Secondary electrical distribution and service-line projects
• Telecommunications, broadband, and cable infrastructure
• Security, perimeter, and access-road lighting
• Parking-area and commercial property lighting with suitable fixture loads
• Smaller roadway or municipal lighting projects
• Projects whose plans or utility standards specifically identify Class 5

These examples do not establish that every Class 5 pole can support those applications. Pole length, attachment height, fixture or conductor loading, line direction, wind, ice, soil conditions, and embedment design must also be reviewed.

Class 5 Compared with Nearby Wood Pole Classes

For comparable lengths and species, Classes 1 through 4 generally have larger minimum dimensions and greater structural capacity than Class 5. Class 6 and smaller classes generally have reduced minimum dimensions and may be appropriate where the approved loads are lower.

Choosing Class 5 instead of a heavier class may reduce material weight, freight, unloading, excavation, and handling requirements. Those potential savings should only be considered after confirming that Class 5 has sufficient capacity for the complete installation.

Likewise, Class 5 should not automatically replace Class 6 simply because it is larger. The appropriate pole is the class that satisfies the approved structural requirements without unnecessary size or cost.

Understanding ANSI O5.1 Class 5 Requirements

ANSI O5.1 establishes minimum quality and dimensional requirements for wood poles used as single-pole utility structures. Classification accounts for wood species, overall length, minimum circumference, taper, and associated strength characteristics.

A Class 5 pole generally has a minimum top circumference of approximately 19.5 inches. Its required circumference six feet from the butt is larger and changes according to pole length and species. One fixed six-foot circumference does not apply to every Class 5 pole.

Use LED Lighting Supply’s wood pole dimension estimation calculator for preliminary dimensional planning. Confirm final measurements against the selected product data and the requirements governing the project.

Typical Class 5 Pole Characteristics

• Minimum top circumference: Approximately 19.5 inches, subject to species and applicable specifications
• Circumference six feet from the butt: Varies by pole length and wood species
• Relative capacity: Below Classes 1 through 4 but above Class 6 and smaller classes for comparable lengths and species
• Installation style: Typically installed using direct embedment
• Available lengths and species: Vary by manufacturer, region, and project requirements

Selecting Class 5 Wood Poles for Lighting

Class 5 poles may support security, perimeter, parking-area, access-road, or general site lighting when the fixture arrangement and environmental loads remain within the pole’s approved capacity. The lighting layout and structural pole selection should be evaluated separately and then coordinated before ordering.

A photometric plan can help determine:

• Required pole quantity and placement
• Fixture mounting height
• Fixture wattage and lumen output
• Optics and distribution pattern
• Target foot-candle levels and uniformity
• Spill-light and property-line limits

The structural evaluation must account for:

• Number of fixtures mounted on each pole
• Fixture, arm, crossarm, and bracket weight
• Total projected area or EPA of the mounted equipment
• Fixture orientation and attachment height
• Basic wind speed and exposure category
• Applicable ice, terrain, and elevation conditions

Do not select Class 5 based only on fixture wattage. A lower-wattage fixture may still impose substantial loading when it has a large projected area, is mounted high on the pole, or is combined with multiple fixtures and brackets.

Where Class 5 May Not Be the Right Lighting Pole

Class 5 may be unsuitable for taller installations, large multi-fixture assemblies, heavy crossarms, high projected-area fixtures, or sites with demanding wind and ice conditions. Sports lighting and other high-output applications can create significant loads because of mounting height, fixture quantity, aiming, and bracket configuration.

Do not assume that a Class 5 pole is suitable merely because the lighting layout calls for a moderate mounting height. The complete fixture package and site loading conditions must be evaluated.

If the proposed configuration exceeds the available capacity, the project may require a heavier wood pole class, a different fixture arrangement, a reduced mounting height, or another pole material and design.

Selecting Class 5 Poles for Utility and Communications Projects

Class 5 poles may be considered for secondary distribution, service lines, communications cables, broadband equipment, and similar infrastructure where the approved loads remain within the pole’s capacity.

The design may need to account for conductors, service drops, crossarms for utility distribution, insulators, communications cables, cabinets, and other equipment. Span length, line angles, termination points, attachment height, unbalanced loading, wind, ice, and guying can substantially affect the required class.

A Class 5 pole used along a straight run may have different requirements from a pole installed at a corner, dead end, road crossing, or equipment location. The utility or project engineer should confirm the class, length, clearances, attachment configuration, setting depth, and guying before purchase.

Wood Species and Availability

Wood species influence pole dimensions, strength characteristics, taper, weight, treatment performance, and regional availability. Southern Yellow Pine is commonly used for treated utility poles because it can provide suitable structural properties and accepts pressure treatment effectively.

Other recognized pole species may also be available. Do not assume that different species have identical dimensions, weight, or design values for the same pole class and length.

Confirm which species is offered for the required Class 5 configuration and whether the utility, municipality, engineer, or project specification limits acceptable species.

CCA Treatment and Wood Preservation

Class 5 poles may be pressure treated with chromated copper arsenate, commonly called CCA. CCA helps protect wood against fungal decay, termites, and other organisms that can degrade untreated material.

Preservative treatment does not establish the ANSI pole class and does not guarantee a fixed service life. Treatment type, penetration, retention, intended exposure, handling, field modifications, installation quality, and inspection practices can all affect long-term performance.

Confirm that the treatment is suitable for the intended ground-contact exposure and applicable American Wood Protection Association requirements. For additional information, review our guide comparing CCA, DCOI, and pentachlorophenol pole treatments.

Direct Embedment and Height Above Grade

Class 5 wood poles are typically installed by placing part of the pole below grade and compacting approved backfill around it. Anchor bolts are not normally used for a conventional direct-embedded wood pole.

Because part of the pole is below ground, the nominal pole length is not the same as the available height above grade. Lighting and equipment layouts should account for:

• Required setting depth
• Fixture, arm, or equipment attachment height
• Clearance from the top of the pole
• Final grade at the pole location
• Changes in site elevation

Setting depth, hole diameter, backfill, and stabilization requirements depend on the approved design and site conditions. Soil bearing capacity, groundwater, frost depth, slopes, erosion, and pole loading may affect the final installation.

Delivery, Handling, and Field Modifications

Class 5 poles may be lighter than comparable Classes 1 through 4, but they can still require specialized freight, mechanical unloading, and adequate site access. Confirm turning space, overhead clearances, unloading responsibility, and the equipment needed to move and position the poles safely.

Store poles in a stable area and support them off the ground where practical. Avoid dragging poles or damaging the preservative-treated outer surface.

Field drilling, cutting, trimming, or notching should follow the manufacturer’s instructions and applicable project requirements. Exposed wood may require an approved field-applied preservative treatment to maintain protection at the modified area.

What to Confirm Before Ordering Class 5 Poles

• Required pole class and overall length
• Required fixture or equipment height above grade
• Wood species and product-specific dimensions
• Preservative type, treatment requirements, and retention level
• Fixture, bracket, conductor, cable, and equipment loads
• Wind, ice, exposure, and site-specific environmental conditions
• Setting depth, backfill, and stabilization requirements
• Utility, municipality, engineer, or owner approval requirements
• Minimum order quantity, production status, and lead time
• Delivery access, unloading responsibility, and storage plan

Some poles may be produced to order, while selected configurations may be available more quickly. Confirm current availability rather than assuming that a particular class, length, or species is stocked.

LED Lighting Supply’s Product Specialists can help identify available Class 5 configurations, obtain product documentation, and prepare a pole quote. Structural suitability, clearances, attachment design, embedment, and code compliance should be verified by the qualified professional responsible for the project.

Class 5 Pole Standards and Documentation

Required documentation varies by manufacturer and project. Product data may identify the ANSI O5.1 pole class, species, overall length, dimensions, preservative treatment, retention level, pole branding, and plant quality-control information.

Utility, municipal, government, and other formally specified projects may require approval before purchase. A Class 5 marking alone does not confirm acceptance by a particular authority. Verify the required submittals and obtain approval when applicable.

Class 5 Wood Pole Warranty

Warranty coverage varies by manufacturer, species, treatment, application, handling, field modification, and installation. Confirm the warranty period, covered conditions, documentation requirements, and exclusions before ordering.

Keep purchase documents, pole identification, treatment records, delivery information, and installation records. Improper unloading, storage damage, untreated field cuts, unapproved modifications, or installation outside the approved design may affect coverage.

Explore Poles by Height

• 10 to 15 Foot Light Poles
• 20 to 25 Foot Light Poles
• 30 to 35 Foot Light Poles
• 40 to 45 Foot Light Poles
• 50 to 55 Foot Light Poles
• 60 to 65 Foot Light Poles
• 70 Foot Light Poles

Compare Other Wood Pole Classes

Compare nearby classes when the structural requirements have not been finalized. Classes 1 through 4 may be required for greater loading demands, while Class 6 may be appropriate when the approved design permits a smaller pole.

• Class 1 Wood Poles
• Class 2 Wood Poles
• Class 3 Wood Poles
• Class 4 Wood Poles
• Class 6 Wood Poles

Class 5 Wood Poles FAQs

How Do I Know Whether Class 5 Is the Right Wood Pole Class?

Class 5 is appropriate only when the approved structural loads exceed smaller classes but do not require the larger dimensions of Classes 1 through 4. Confirm the required length, attachments, wind and ice conditions, soil considerations, and complete equipment loading before selecting a class.

Can A Class 5 Wood Pole Be Used For Site Lighting?

Class 5 poles may support security, perimeter, parking-area, access-road, and general site lighting when the complete fixture package and environmental loads remain within approved capacity. Fixture wattage alone is not enough; fixture area, mounting height, brackets, quantity, orientation, and wind loading also matter.

How Does Pole Length Affect Available Mounting Height?

The nominal pole length is not the available height above grade because Class 5 wood poles are typically direct embedded with part of the pole below ground. Account for approved setting depth, final grade, attachment height, top clearance, and site elevation changes when planning the installation.

Do All Class 5 Wood Poles Have The Same Dimensions?

No, a Class 5 designation does not identify one fixed pole size. While the minimum top circumference is generally approximately 19.5 inches, butt dimensions vary by pole length and wood species, so final measurements should be confirmed against product data and project requirements.

What Should Be Confirmed Before Ordering A Class 5 Wood Pole?

Confirm the required class, overall length, species, treatment, dimensions, equipment loads, site conditions, installation requirements, approvals, lead time, delivery access, and unloading plan. A Class 5 marking alone does not confirm acceptance by a utility, municipality, engineer, or other project authority.