If you’ve ever driven past a wind farm, a power substation, or a telecommunications tower standing tall against the sky, odds are you’ve seen a tubular tower. As someone who’s been supplying these structures for nearly 12 years—first as a project engineer, now leading our team of fabricators and inspectors—I’ll tell you: every tubular tower that stands strong through decades of harsh weather starts with avoiding the same small, fixable failures that sneak up on even the most well-designed projects. Too often, I’ve seen clients cut corners on inspections or rush installation to save time, only to end up with premature corrosion, structural warping, or even full tower degradation. Today, I’m breaking down the most common failures we address at our shop, what causes them, and how suppliers and project teams can catch them before they become costly headaches. Tubular Tower
First, let’s define what a tubular tower is for anyone who might be new to the space: it’s a vertical, hollow steel structure, usually made of rolled and welded steel plates, used to support equipment ranging from wind turbine blades (our largest units top 180 meters) to cellular antenna arrays. The design is straightforward, but its simplicity is also its weakness—tiny flaws in material, manufacturing, or installation can cascade into major issues over time. The first and most prevalent failure we encounter is internal and external corrosion. I can’t stress this enough: corrosion isn’t just “rust”—it’s a chemical breakdown of the steel that eats away at the tower’s wall thickness, reduces its load-bearing capacity, and can cause sudden, catastrophic failure if left untreated.
There are two main types of corrosion we see in tubular towers: external and internal. External corrosion is the most visible, though often missed during routine inspections. It starts when the protective coating—usually a layer of zinc-rich primer and a topcoat of polyurethane or epoxy—chips, scratches, or peels. This can happen during transportation (when a tower is dragged across a flatbed truck or bumped into a guardrail), during installation (when crew members drag tools across the base flange), or from environmental exposure right out of the shop. For example, a client in the Pacific Northwest once told us their 5-year-old wind tower had developed a 3-inch patch of rust at its base—turns out, their installation team had stacked the tower on wet gravel for three days, and the bottom coating wore through where the supports pressed against the steel. Once the coating is compromised, moisture gets in, and over months, that rust spreads. What starts as a small surface blemish can eat through 20% of the tower’s wall thickness in less than a decade, according to our internal testing data and industry studies.
Internal corrosion is even more insidious, because it’s hidden inside the hollow tower, where inspections can’t see it without cutting access ports or using specialized tools like ultrasonic thickness gauges. This usually happens when the tower isn’t properly sealed during manufacturing, allowing water, snowmelt, or condensation to get trapped inside. For smaller cellular towers, which often have equipment installed inside their core, that moisture mixes with dust and debris left over from fabrication, creating a conductive environment that accelerates rust. A telecom client of ours had a 70-meter tower in the desert Southwest that failed an annual inspection when we detected internal corrosion at the mid-height section—turns out, the manufacturer had skipped adding weep holes to the tower’s base, so rainwater that seeped into a tiny gap at the top never drained, and over 10 years, it ate through the wall enough to put the tower’s load rating at risk. We had to fabricate a replacement mid-section and install weep holes for free, but the client lost six months of cellular service while repairs were underway—something we worked hard to fix quickly, but it taught us how critical design details are for preventing hidden corrosion.
The second most common failure is structural warping and misalignment, which usually happens during manufacturing or installation. Tubular towers require extremely tight tolerances: a 100-meter tower must be straight to within 10 millimeters along its entire length, and its flanges (the circular steel plates used to bolt sections together) must be perfectly parallel to each other. Even a small warp in a flange can throw the entire tower out of alignment, putting uneven stress on the bolts and leading to fatigue over time. Most warping happens when fabricators rush the welding process, heating sections of the tubular steel too quickly without using proper jigs to hold them straight. I once worked on a project where a third-party fabricator skipped pre-weld clamping for a 50-meter tower section, and the resulting warp meant the tower’s top was 15 millimeters off-center. The installation crew tried to force the flanges together with large pry bars, which bent the flanges further and damaged 20 of the 32 bolts. We had to re-fabricate the section at our shop, but the client paid extra for rush production and lost a month of construction time—all because of a small, avoidable mistake.
Installation-related misalignment is another big culprit. When crew members are lifting sections of a tubular tower with a crane, they often rely on rough measurements to line up flanges, rather than using laser alignment tools. On a recent wind farm project, the installation team skipped using a laser to align the tower’s base to the anchor bolts, resulting in a 8-millimeter gap between two flanges when bolted. Over two years, that uneven connection caused the bolts to fatigue and crack, requiring us to send a team to replace all 16 base bolts at a fraction of the original price, but the downtime cost the farm over $20,000 in lost power generation. The lesson here? Tolerances for tubular towers aren’t arbitrary—they’re there to distribute load evenly across every component, so cutting corners on alignment leads to stress concentrations that cause failure.
Third, and less talked about, is material quality issues that creep into the supply chain. Not all tubular steel is created equal. Many low-cost suppliers use recycled steel that has hidden flaws, like inclusions or inconsistent chemistry, which make the tower more prone to cracking under extreme loads. For example, during the 2021 Texas winter storm, three small cellular towers failed when their steel walls cracked at the base. After testing, we found that those towers used a grade of steel with a lower yield strength than the project specifications— the steel couldn’t handle the extra weight of ice and wind during the storm, so it split at the weakest point. At our company, we source all our steel from certified mills that provide material test reports (MTRs) for every batch, and we perform our own ultrasonic testing on every tower section before it leaves our shop. But too many smaller suppliers skip these steps to undercut prices, leading to towers that fail well before their 25-year design life.
Another material-related failure is improper base design. The base of a tubular tower transfers the entire weight of the structure, plus any wind or ice loads, to the ground. If the base flange is too thin, or if the anchor bolts are undersized, the tower can settle or tilt over time. I saw this on a remote telecom tower in Montana that had been standing for 12 years—we were called out to inspect it when the antenna array started tilting. The issue? The original base flange was only 12 millimeters thick, 3 millimeters thinner than the project specs, and the tower had settled unevenly into the rocky, high-clay soil. We had to add a steel collar around the base and reinforce the anchor bolts to keep it standing, but the tower will now need extra inspections every year to monitor for further settling.
Finally, fatigue failure in welds. Welds are the critical connection points in a tubular tower, where different sections are joined, or where accessories like ladders or antenna brackets are attached. Over time, repeated stress from wind, temperature changes, and equipment vibration can cause cracks to form in these welds, starting as tiny micro-fractures that grow larger until they compromise the tower’s integrity. This is especially common in areas with high wind speeds, like coastal or mountainous regions. A wind turbine client in Oklahoma had a 150-meter tower that developed a 2-foot-long crack in the weld connecting the mid-section to the top nacelle mount after just 8 years. Inspection showed the weld had not been properly stress-relieved after fabrication—meaning it didn’t have time to cool slowly, leaving it brittle and prone to cracking under repeated wind loads. We repaired the welds and added a secondary backup bracket, but the client had to shut down one turbine for two weeks, costing them over $50,000 in revenue.
So, what can be done to avoid these common failures? From my perspective as a tubular tower supplier, the key is transparency and collaboration. First, never skip coating inspections during every stage: after manufacturing, during transportation, and before installation. At our shop, we have a dedicated team that checks every coating with a thickness gauge to ensure it meets industry standards, and we provide clients with photos and certificates for every section. Second, always use certified steel with material test reports, and perform non-destructive testing (ultrasonic, magnetic particle) on welds and critical sections. We include free ultrasonic testing for all our tower sections as part of our standard service, because we’d rather catch a flaw in our shop than on a job site. Third, invest in proper installation tools: laser alignment equipment, torque wrenches for bolts, and access to certified inspectors. We offer on-site installation support for all our clients, where our team works with installation crews to ensure flanges are aligned correctly, bolts are torqued to spec, and coatings are not damaged during assembly.
If you’re working on a project that needs a reliable tubular tower—whether it’s for wind energy, telecommunications, or any other application—you don’t have to navigate these failures alone. Our team has over a decade of experience designing, fabricating, and installing tubular towers that meet and exceed industry standards, and we prioritize transparency and quality at every step of the process. We don’t cut corners on material testing, we provide full documentation for every component, and we’re here to support your project from design through long-term maintenance. If you want to avoid the costly delays and safety risks that come with common tubular tower failures, reach out to our team to discuss your project needs. We’ll work with you to design a tower that fits your budget and your timeline, and we’ll stand behind our work for years to come.
Electrical Transmission Tower References
- American Petroleum Institute. (2020). API 5L: Specification for Line Pipe. Washington, DC: American Petroleum Institute.
- National Association of Corrosion Engineers (NACE). (2019). Corrosion Control for Steel Structures in Harsh Environments. Houston, TX: NACE International.
- International Code Council (ICC). (2021). International Building Code (IBC) Chapter 15: Structural Steel. Washington, DC: ICC.
- Wind Turbine Manufacturers Association (WTMA). (2022). Guide to Tubular Wind Turbine Tower Maintenance and Failure Prevention. Washington, DC: WTMA.
- Federal Communications Commission (FCC). (2020). Structural Standards for Commercial Telecommunication Towers. Washington, DC: FCC.
Qingdao BEST Steel Structure Co., Ltd.
Qingdao BEST Steel Structure Co., Ltd. is one of the most professional tubular tower manufacturers and suppliers in China. We warmly welcome you to buy customized tubular tower made in China here from our factory. If you have any enquiry about OEM service, please feel free to email us.
Address: Jiaobei Industrial Park, Qingdao, China
E-mail: sales@qdbsstower.com
WebSite: https://www.qdbsstower.com/
