I think typical thin SS banding has limited strength and high corrosion
risks. Then if the stress stretches the top band or it breaks, down
comes the antenna. Plus how do you attach the antenna?
You could get a fab shop to ring roll some rings in say 1/4" thick x 2"
wide 316 stainless, bend or weld on ears for cinch bolts and have them
weld on whatever you need for attaching the vertical. Scale up or down
depending on whatever "large" means. The top band gets a lot of moment.
Or get it made in A36 hot roll steel (esp. if thicker is needed) and
have it hot dip galvanized. This would be my preference. Plus, thicker
A36 can be easily torch annealed if multi pass rolling is needed.
Or have Portland Bolt make some giant HDG u-bolts in 3/4" dia or larger
(up to 4" diameter rod!) and use a channel or large angle cross piece.
https://www.portlandbolt.com/products/bent/round-u-bolts/ Easy to get a
quote.
Grant KZ1W
On 3/5/2019 16:20 PM, Gary K9GS wrote:
I'm looking for ideas for securing a large HF vertical to a concrete post.The post is approximately
10" in diameter. It is also near saltwater so corrosion is a concern.I've thought of using
several large SS hose clamps but even the widest ones I could find are 3/4". I'm looking for
something a little more robust. I do not want to drill into the concrete out of concern for
letting in moisture/saltwater. Any ideas?73,Gary K9GS
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