[TowerTalk] Galvenized Monopole Foundation

Jonathan - KE0YBL KE0YBL at protonmail.com
Tue Aug 4 18:41:10 EDT 2020


Hello Esteemed Cloud Climbers :)

I may be acquiring a self-supporting ~85ft (after assembled) galvanized steel monopole. Its diameter is graduated from a ~5ft base to 2ft on top (3 sections). I'm planning to use it for rotated amateur radio HF/VHF beams. I've spoken with the tower brand (a local company) that will sell me the concrete bolt kit (a couple dozen ~6' bolts), but they're not able to provide any other details about the tower or concrete footing requirements. Apparently each tower is built by different manufacturers based on needs, but they don't track them by serial number - just slap their brand name on it. They all use the same bolt types by their spec. I'm sure they're not able to provide me footing requirements for liability reasons, since I'm not the original purchaser.

I'm wondering if any of you have reasonable options for footing design without spending too much on engineering costs. I understand the foundation costs will be non-trivial - pricey bolts, fairly extensive rebar cage, significant block of concrete, etc. My local code requirements don't require actual engineering details.

Thanks for your thoughts,
Jonathan


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