Solar panel installations on commercial and industrial buildings are booming across Florida, but the structural engineering behind them is anything but simple. Cantilevered mounting structures, elevated racking systems, and rooftop ballasted arrays all require careful wind load analysis to meet code and protect the building. Our team specializes in PE-sealed engineering packages for solar support structures of all types.
Solar Structures in High-Wind Environments
Florida's combination of abundant sunshine and extreme wind exposure creates a unique engineering challenge for solar installations. The same geographic advantage that makes solar energy attractive — proximity to the coast, low latitude, long sunny seasons — also means design wind speeds of 150 to 180+ mph across much of the state. Solar panels and their support structures must be engineered to resist these forces while remaining economically viable.
The wind loads on solar arrays depend heavily on the mounting configuration. Ground-mounted systems, rooftop flush-mount arrays, and elevated cantilevered structures each see fundamentally different wind force patterns. Elevated and cantilevered systems, in particular, require more intensive engineering because their height and exposure increase the wind pressures, and the cantilever geometry introduces significant bending moments into the support columns and foundations.
Metal Cantilever Structures for Solar Arrays
One of the more complex project types we handle is the metal cantilever carport or canopy structure supporting a solar panel array. These structures serve double duty — providing covered parking or shaded areas while generating renewable energy from the panels mounted on top. The engineering must account for both functions.
The wind load analysis for a cantilever solar structure involves determining the velocity pressure at the canopy height (often 12 to 20 feet above grade), applying the appropriate external pressure coefficients for open or partially enclosed canopies per ASCE 7-22 Chapter 30, calculating the net uplift and downward pressures on the panel array, designing the cantilever columns for combined gravity loads (self-weight plus panels) and lateral/uplift wind forces, and verifying the foundation — typically drilled piers or spread footings — for overturning, sliding, and uplift.
Rooftop Solar Array Engineering
For rooftop installations, the engineering focus shifts to the interaction between the solar array and the building's roof system. Key considerations include the additional dead load of the array on the roof structure, wind uplift on the panels which transfers through the mounting system into the roof, the roof zone where the array is located (interior vs. edge vs. corner zones see very different pressures), and the attachment method — mechanically fastened, ballasted, or hybrid systems each require different analysis approaches.
Explore Solar Uplift Forces
Our Solar Panel Uplift Calculator lets you estimate the wind uplift forces on rooftop solar panels based on your specific wind speed, roof height, and exposure. It's a great first step in understanding the demands your solar project will face.
The ASCE 7-22 Framework for Solar
ASCE 7-22 provides specific guidance for solar panel wind loads in Chapter 29 (ground-mounted arrays) and Chapter 30 (rooftop arrays on buildings). The standard accounts for the panel tilt angle, the array's position on the roof, edge and corner effects, and the shielding provided by adjacent panel rows.
For canopy-type structures, the wind pressure coefficients come from ASCE 7-22 Figure 27.4-4 (monoslope free roofs) or similar provisions depending on the geometry. The net pressure — the difference between top and bottom surface pressures — is what drives the structural design. These net pressures can be surprisingly high, especially for open structures where wind can act on both surfaces simultaneously.
What Our Solar Engineering Package Includes
A typical deliverable for a solar support structure includes: site-specific wind load calculations per ASCE 7-22, structural analysis of the support framing (columns, beams, purlins, and connections), foundation design or verification for the calculated loads, connection detail drawings for the panel-to-rail, rail-to-purlin, and purlin-to-structure interfaces, and a PE-sealed calculation and drawing package ready for permit submission.
For projects requiring Connecticut or other state PE seals in addition to Florida, we coordinate with our licensed network to provide multi-state sealed packages as needed.
Start Your Solar Project
Whether you're a solar installer, EPC contractor, or building owner planning a solar installation, contact us for a quote on the engineering package. You can also use our free solar uplift calculator to get a preliminary sense of the wind forces involved.