[TowerTalk] Securing vertical to concrete post?

[Gary K9GS]

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