Have conduits to install up the exterior of concrete light poles. Do not want to drill into them to risk problem with wind load calcs. To band it would look bad. Found some epoxy on 1/4 x 20 studs, but someone said they have to be UL listed for that application. My question is, are the anchors and associated screws we would normally use UL listed? I never checked.
A few 3/16 holes for tapcons would do what now?
The OP is concerned about any holes compromising the structural integrity of the pole. I will add that the most heavily loaded part of the pole, both in terms of wind load and dead load, is usually right at the base. So if the pole has a uniform diameter, don't worry about it. It is stronger than it needs to be already, at any point that would be at least 3 ft above the bottom, where you'd need to mount a conduit.
If the pole is tapered, it might be a different story. But usually, a few tiny holes for auxiliary mounting aren't significant enough to matter. If you use epoxy anchors, the added benefit is that they restore some (not all) of the tensile strength at that point, above what a dry fastener hole would do.
