Let’s Talk Strut
Strut channel is one of the most fundamental components used in modern infrastructure builds. It’s everywhere—supporting HVAC units, securing conduit runs, and suspending countless mechanical and electrical services. Yet despite its critical role, one important reality is often overlooked:
Not all strut channel is created equal.
At first glance, most strut looks similar. But when you start measuring it against the manufacturer’s original CAD specifications, significant inconsistencies begin to appear—and those inconsistencies matter more than many people realize.
Strut channel forms the foundation of suspended infrastructure systems. When the dimensions of that foundation vary, every component connected to it is affected. A poor foundation inevitably leads to performance and reliability concerns down the line.
Recently, we conducted a practical test. We sourced as many different strut brands as we could find and compared their real-world dimensions to the fabricators’ CAD data. The results were eye-opening. The dimensional discrepancies across some brands were substantial.
Now, it’s no secret that we manufacture strut clamps, so we understand first-hand how inconsistent strut profiles can impact clamp performance. But the testing also showed that this problem isn’t limited to polymer or specialized clamp systems. Even traditional steel-to-steel clamps are affected when the strut dimensions fall outside standard tolerances.
When strut dimensions are inconsistent, clamps cannot achieve an optimal fit. This can introduce unwanted movement in the system, increasing the likelihood of harmonic vibration and water hammer effects in suspended pipework. Over time, that movement accelerates wear on the galvanized coating, which in turn increases the risk of galvanic corrosion on critical infrastructure services.
| Feature Comparison | Standard Roll-Formed Steel | Precision Extruded (Alu) |
|---|---|---|
| Manufacturing Method | Roll-Formed (Varies by Tool Wear) | Die-Extruded (Constant) |
| CAD Specification Match | Significant Deviations | Tight Tolerance Match |
| Lip Height Consistency | Inconsistent / Low Engagement | Uniform / Secure Engagement |
| System Reliability | Risk of Vibration/Corrosion | Maximum Stability |
Considering that strut channel is primarily used to suspend mechanical and electrical lines, dimensional accuracy—particularly lip height—is extremely important. Ideally, these measurements should closely match the original CAD specifications to ensure consistent clamp engagement and secure installations.
One interesting observation from our testing is that extruded profiles, such as aluminum strut, tend to maintain far tighter dimensional tolerances than rolled galvanized steel strut. Extrusion processes inherently produce more consistent profiles, whereas roll-formed steel can vary depending on tooling wear, material thickness, and manufacturing controls.
The difference in precision becomes very clear when you compare the profiles side by side—as the images below illustrate.
