I had a ground water issue when I had my HG70HD installed in the sandy soil in
Poway near San Diego. The installer had to line the opening with plywood
sheets. He was careful about bracing the sheets after dropping the base
assembly into place. In place for 8 years and never a problem.
Bob K9RHY
Bob Farkaly
> On Apr 30, 2014, at 20:20, Mike Reublin NF4L <nf4l@comcast.net> wrote:
>
> I'm negotiating to get the base for my HG70-HD dug and poured. I have a high
> water table, soil tends toward sandy, and an engineer said he would be
> happier if the hole were 10' deep rather than the 7.5' called for in the
> manual.
>
> The concrete guys I'm talking to want to line the hole with plywood to
> prevent collapse. One guy who does a lot of big sign installations says he
> does it regularly, and there would be no stability issues.
>
> I've read several times the pour needs to be into undisturbed soil, no
> backfill, altho that's not in the manual.
>
> What are the facts?
>
> 73, Mike NF4L
>
>
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