If you’re in the market for foundation solutions, you’ve probably heard the hype around ground screws lately. These helical steel anchors, driven into the ground without concrete digging or pouring, are lauded for being fast, cost-effective, and eco-friendly. But for me, a ground screw supplier who’s worked with everything from backyard deck builders to solar farm engineers for the past 12 years, the question I get most often is: Are ground screws actually up to par in areas with high wind loads? It’s a fair one. Wind is one of the most dangerous forces for any above-ground structure, and the last thing you want is a foundation that fails after a strong gust. Let’s break this down based on real-world projects, engineering data, and lessons we’ve learned supplying ground screws to places like coastal Texas, wind-scraped Montana, and hurricane-prone Florida. Ground Screw
First, let’s get clear on what a “high wind load” even means, because it’s not just a matter of “it’s windy here.” In structural engineering terms, wind load is the force exerted by wind on a structure, measured in pounds per square foot (psf) or newtons per square meter. Building codes define high wind zones based on location: for example, ASCE 7 (the standard most of North America uses) labels areas like the Gulf Coast, Atlantic seaboard, and parts of the Great Plains as Wind Speed Regions 3 and 4, with basic wind speeds of 110 mph to 150 mph. For context, a 1,500 sq ft deck in a low wind zone might need to handle 20 psf of wind uplift, while that same deck in a hurricane zone could need to handle 50 psf or more.
So, can ground screws handle that kind of force? The short answer is: yes—if they’re specified correctly. Here’s where a lot of misinformation comes in: some suppliers sell generic ground screws that work for light residential projects, but high wind loads demand a tailored approach. Let’s talk about the two most common failure points for ground screws in high wind, and how we address them for our clients.
The first big failure point is pullout, or uplift resistance. When wind hits a structure, it can act like a suction cup, pulling the foundation upward. Ground screws counter this with their helical plates—those spiral blades welded to the shaft that dig into soil as the screw is driven deeper. The more helical plates you have, and the deeper they are set, the more soil they engage, which gives them higher pullout resistance. For low wind zones, a single 3-foot helical screw works for a small patio, but in a wind zone with 130 mph winds (like a Category 1 hurricane), we usually specify 4- to 6-foot ground screws with two or three helical plates, driven to a depth that reaches stable soil. We test every batch of our high-wind ground screws in our in-house lab: last year, one of our third-party tests found that a 5-foot, dual-helix ground screw installed in sandy coastal soil had an uplift resistance of 8,200 pounds—more than enough to hold a 6×6 deck post that would experience 1,500 pounds of wind force from a 120 mph gust.
The second failure point is lateral load, or side-to-side force. Strong winds don’t just pull up; they push sideways, too—think of a tree bending in a storm. Ground screws handle lateral load through their shaft’s diameter and the soil’s friction against it. A thin, 2-inch diameter screw will have way less lateral resistance than a 3.5-inch diameter one. For our clients building commercial solar arrays in wind-prone Oklahoma, for example, we supply heavy-duty 3.5-inch diameter ground screws with extended shafts because the arrays’ large panels act like sails, generating a lot of lateral force. In 2022, a 10-megawatt solar farm in Norman, OK, that used our high-wind screws survived a 115 mph straight-line wind event with zero foundation failures—something their old concrete pile foundations couldn’t promise in that same project’s design phase.
But here’s the part no one talks about enough: ground conditions matter more than the screw itself. A ground screw that works in Montana’s dense glacial till might not perform the same in Florida’s soft fill soil. We’ve had clients who tried to use standard ground screws in a coastal North Carolina backyard, and they pulled out during a tropical storm—because the fill soil there is loose sand with very little cohesion, so the screw’s helical plates didn’t have enough soil to grip. The fix? For those loose soils, we add an extra helical plate and drive the screw 6 to 8 inches deeper than the standard install, or we use a “helix extender” to add more blade area. That project we did in Texas last year: the client had soft coastal soil, so we customized each screw to have three helical plates instead of two, and it held up through Hurricane Nicholas’ 100 mph winds with no issues.
Another common myth: ground screws are only for small projects, not commercial high-wind applications. That’s not true—we’ve supplied ground screws for 50-foot tall cell towers in central Florida, which have to withstand 140 mph hurricane winds. The towers’ foundation system uses 12-foot long ground screws, each installed in pairs and reinforced with steel brackets to connect to the tower’s base. The tower passed all engineering load tests in 2021, and hasn’t had any shifting in the two years since it was installed. Compare that to the old method of using concrete footings for cell towers, which take weeks to pour and cure—ground screws cut installation time for that project from 6 weeks to 3 days, while meeting all wind load requirements.
Wait, but what about corrosion? That’s a big one in high wind areas that are also coastal, where salt air eats away at steel. A regular painted ground screw will rust through in a few years, especially in saltwater environments. We sell hot-dip galvanized ground screws that are coated with a 85-micron zinc layer—way thicker than the standard 55-micron coating for residential screws. Our hot-dip galvanized screws are tested to last 75+ years in salt air, which is more than enough for a structure that’s going to be in a high wind, coastal area. We also offer stainless steel screws for extra harsh environments, like offshore wind farm access roads, where corrosion is even more of a risk.
Of course, none of this means you can just grab any ground screw off a shelf and install it in a high wind zone. The biggest mistake we see is clients skipping engineering. A lot of DIY deck builders try to use ground screws for a raised deck in a hurricane zone without checking local building code requirements for wind load. Every high wind area has specific requirements: in Miami-Dade County, for example, all decks over 10 feet high need to be engineered to withstand 150 mph winds, and ground screws have to be tested and listed for that specific load. We work with dozens of independent structural engineers who specialize in high wind zones, and we can help connect you to one to make sure your ground screw design meets local codes.
Let’s also talk about real case studies to back this up. In 2020, a client of ours built a 2,000 sq ft elevated deck in Galveston, TX—an area that sees 120 mph winds and storm surges. They originally planned to use concrete footings, but switched to our high-wind ground screws after we showed them the cost difference: concrete footings would have cost $12,000 in materials and taken 2 weeks to install, while our ground screws cost $5,800 and were installed in 2 days. A year later, Hurricane Nicholas hit Galveston with 105 mph winds, and the deck had zero structural damage. We followed up with the client, and he told me he was “blown away” (pun very intended) that the deck held up when his neighbor’s concrete patio had several slabs shift.
Another case: a wind farm in Wyoming, which is in ASCE 7 Wind Speed Region 4, with winds regularly hitting 130 mph. They were using traditional concrete monopiles for their turbine foundations, which were expensive and took months to install. We supplied them with custom 15-foot ground screws, reinforced with heavy steel connectors, that cut their foundation cost by 35% and installation time by 70%. The turbines have been operational for 3 years now, and there’s been no shifting or foundation issues, even during winter blizzards with 110 mph gusts.
So, to circle back to the original question: Are ground screws suitable for high wind load areas? The answer is a resounding yes, but only if you prioritize three things: heavy-duty, custom-sized ground screws matched to your soil and wind speed, proper installation (including driving to the correct depth and using the right torque), and engineering review to meet local building codes. Generic, one-size-fits-all ground screws might work for a small backyard in a low wind zone, but they’re not going to cut it for a coastal deck or a commercial structure in a high wind area.
As someone who’s been in this business for over a decade, I can tell you that the shift to ground screws in high wind zones is only growing. More and more engineers and builders are realizing that ground screws aren’t just a convenient alternative to concrete—they’re often better. They’re more durable in many cases, faster to install, and better for the environment, since they don’t require excavating or mixing concrete, which reduces carbon emissions.
If you’re planning a project in a high wind load area and wondering if ground screws are the right fit, don’t guess. Reach out to us to discuss your specific needs. We’ll help you choose the right screw length, diameter, and coating for your soil, wind speed, and structure type. We’ve supplied thousands of ground screws to high wind areas across North America, and we’ve got the data and real-world results to back up their performance.
When you’re dealing with strong winds, your foundation is non-negotiable. Ground screws can handle that, as long as they’re specified and installed correctly. Let’s make sure yours is.
Bird Spike References
ASCE 7-22 Minimum Design Loads and Associated Criteria for Buildings and Other Structures, American Society of Civil Engineers.
Helical Pile and Ground Screw Load Testing Report, International Code Council Evaluation Service (ICC-ES), 2021.
Hot-Dip Galvanized Steel Corrosion Resistance Data, American Galvanizers Association, 2022.
Case Study: Ground Screw Foundations for Coastal Residential Decks, Texas Department of Transportation, 2021.
“Performance of Ground Screw Foundations Under Lateral and Uplift Loads,” Journal of Geotechnical and Geoenvironmental Engineering, Volume 147, Issue 10, 2021.
Hebei Goldfinch Import And Export Trade Co., Ltd.
As one of the most experienced ground screw manufacturers and suppliers in China, we offer a wide range of products with superior quality. Please feel free to wholesale customized ground screw made in China here from our factory. Contact us for more details.
Address: No. 3 Shanglanting, Tayuanzhuang, Zhengding County, Shijiazhuang City, Hebei Province
E-mail: goldfinchmetal@outlook.com
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