Tower talk has been great for ideas. The property is in the general area
of a limestone quarry, and the owner, my brother-in-law-says he has never
been able to get more than 3 to 4 feet before hitting rock. The good news
is he has an excavator, so soon we will make a trial dig to see how deep,
and how solid the limestone is. If the rock is solid and at least 3 feet
down, I like the idea of epoxy and big rebar. If the rock is in chunks,
then the dig goes on!!
On Mon, Apr 8, 2019 at 12:32 PM <k7lxc@aol.com> wrote:
>
> > I have the opportunity to put up a TX-455 tower on the property of my
> brother-in-law: 200+ acres and no zoning issues. He says, however, that
> there is limestone bedrock about only three feet down. Before I start
> Digging pilot holes, is there any advice a how to proceed with providing a
> solid foundation if this is the case.
>
> What sort of shape is the bedrock in? Is it shattered? How big are the
> pieces?
>
> If you have to use "extreme" techniques to get the bedrock out, why
> are you removing it? You want your tower to have a 3000 PSI concrete base
> and most rocks are equal to or more to that. Why excavate a hole of heavy
> material and then refill it with different heavy material?
>
> If this was my installation, I'd drill holes into the bedrock, epoxy
> in a bunch of rebar (you could even use a concrete adhesive to bond the
> rock and the concrete) and then fill the 3' hole with concrete with the
> anchor bolts in it. Voila! A yard or two of concrete and you have a 100%
> reliable, simple and cheaper tower base. I'm just saying.
>
> Cheers,
> Steve K7LXC
> TOWER TECH-
> Professional tower services for amateur and commercial
> Cell: 206-890-4188
>
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