Light Pole Wind Load & EPA: Structural Submittal Guide

Match the pole to the whole mounted assembly

A light pole is selected for what it supports and where it will stand. Two poles with the same height and finish can have different shaft dimensions, materials, bases and allowable assemblies. The fixture wattage and a catalog photograph do not identify that capacity.

Start with a drawing of the complete arrangement: fixtures, arms, brackets and any other equipment, with their positions and orientations. Pair it with the project location and the responsible designer’s structural criteria. That combination is the basis for selecting commercial light poles.

EPA and weight describe different demands

Effective projected area, or EPA, represents projected area multiplied by an appropriate drag coefficient. Acuity’s pole terminology includes fixtures, arms, brackets, cameras and banners among the mounted items to consider. Its cited catalog EPA information is for grade-mounted poles.

Use the manufacturer’s applicable EPA data for the actual configuration. Measuring a fixture’s front face from a photograph does not account for the stated drag relationship or settle the relevant wind direction. Keep the orientation and any accessory assumptions with the value.

Weight remains a separate input. A lighter LED head may have a different wind profile from the fixture it replaces. Reducing pounds does not, by itself, demonstrate that the new pole arrangement is acceptable.

An arithmetic total is only an input

Assume an engineer has accepted additive EPA values for a particular fictional arrangement: two luminaires at 0.7 square foot each and a bracket at 0.3 square foot. The arithmetic total is 2 × 0.7 + 0.3 = 1.7 square feet. If each light weighs 18 pounds and the bracket weighs 8 pounds, the weight total is 44 pounds.

Neither total is a pole approval. The example includes no wind calculation, shaft check, foundation design or evaluation of interactions within the assembly. Use the combination method accepted by the manufacturer or engineer for the specific arrangement; simple addition is not automatically the correct method for every group of fixtures.

Keep the wind speed attached to its design basis

A wind-speed label in miles per hour is incomplete without its definition and source. Acuity’s October 2025 pole-sizing presentation distinguishes wind maps and speed conventions associated with different design criteria. Values drawn from different conventions cannot be treated as interchangeable catalog labels.

The responsible professional should identify the applicable jurisdiction, adopted code and standard editions, site parameters and design approach. Include whether the pole stands at grade or on an elevated structure. A catalog table prepared for one installation condition may not describe another.

When two suppliers give different answers, compare their assumptions before judging the poles. A lower capacity or larger recommended shaft may reflect a different design basis rather than a less efficient product. Resolve that difference in the submittal instead of selecting whichever isolated wind-speed number appears most favorable.

Carry the loads through the connections and foundation

The support system includes the fixture-to-arm connection, the arm-to-pole connection, the pole base and the foundation. A suitable shaft does not design the footing or demonstrate that an existing anchor arrangement can be reused. Soil and support conditions need the responsible professional’s project-specific assessment.

Attach the exact mounting pattern and arm geometry to the structural submission. A substitution that changes offset, orientation, fixture count or accessories changes the assembly being evaluated. Feed those changes back into the lighting model as well, because the emitting surfaces may move.

For steel poles, identify the actual shaft and base configuration rather than the material alone. For composite poles, obtain the manufacturer’s applicable design and attachment information. A shared height does not make different materials or construction methods structurally interchangeable.

Ask about vibration as its own issue

Wind-induced movement can involve more than the static loading comparison. Acuity’s wind-harmonics guidance discusses fatigue effects and the need for qualified investigation where a problem is suspected. It also explains that site-specific variables limit general predictions.

Ask the manufacturer and structural designer whether the selected pole and assembly require a vibration assessment or an approved mitigation measure. A greater EPA capacity does not automatically answer every dynamic question. Damper selection and changes to the support should follow the applicable professional and manufacturer direction.

For an existing pole, previous years of service do not establish its current condition or the suitability of a changed assembly. Bring inspection findings and modification history into the retrofit decision rather than relying only on the old catalog designation.

Preserve the design when equipment is added later

A camera, banner or communication device added after the lighting project introduces weight, wind exposure and another connection. Evaluate it as a change to the mounted assembly, even if it uses very little electrical power. Keep the proposed position and applicable loading information with the request.

The lighting specifications and submittals guide helps retain the accepted configuration and its supporting documents. That record gives future teams a useful starting point when they propose changes.

A complete pole submittal should connect the actual assembly to the actual site criteria, mounting connections and foundation design. Height, fixture count and a wind-speed headline are useful identifiers, but they leave the central structural questions unanswered on their own.