I have the same fencing panels. I attached the HC to them with wire (I had a bunch of 14ga wire left over from something). Wire twists every 6-8 inches or so. I wouldn’t trust zip ties - predators can chew through plastic.
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Am thinking that metal may be too thick to drive screws into without drilling pilot holes.I would use self-tapping metal screws with a hex head (similar to metal roofing screws but not the same thing--ask for them at your hardware store).
Maybe... it worked on our greenhouse build last year, and those were pretty heavy, sturdy tubes--but I haven't done those fence panels, and maybe they're thicker. We did put up a prefab panel-type fence a couple years ago--it used self-tapping screws, but it's fairly light-weight.Am thinking that metal may be too thick to drive screws into without drilling pilot holes.
I've worked on a large greenhouse frame like that, but big tubes, like 4x6.Maybe... it worked on our greenhouse build last year, and those were pretty heavy, sturdy tubes--but I haven't done those fence panels, and maybe they're thicker. We did put up a prefab panel-type fence a couple years ago--it used self-tapping screws, but it's fairly light-weight.
I would use self-tapping metal screws with a hex head (similar to metal roofing screws but not the same thing--ask for them at your hardware store). You will need appropriate-sized washers to hold down the hardware cloth. An impact driver will make this job much easier, but an electric drill will also work.
While I use zip ties liberally, I wouldn't use them for this job except as a temporary expedient or a way of holding the HC in place while applying the metal screws & washers. They will eventually weaken and break, and most likely this will happen at the worst possible time.
Good quality wire will work, but will not be as secure and, IMO, will be more of a hassle to do.
Welcome!
I had stainless steel zip ties years ago, very strong, and hold up better than plastic.
Electric fencing for bears, absolutely! Premier1fencing.com has good products and advice, and @Howard E and @cmom have excellent advice and pictures of their fencing.
You will have every critter known in your state show up sometime for chicken dinner, and being prepared pays off.
Mary