Grant -
He said depth was more important than width, citing "pier effect and
overturning moment of a lever". Who knew?
Mike
On May 1, 2014, at 12:32 AM, Grant Saviers <grants2@pacbell.net> wrote:
> Your engineer can design a spread base that handles the load. More concrete,
> wider, but about 3' deep as a guess. It is an alternative I considered for
> elevated guy anchors.
>
> Grant KZ1W
>
> On 4/30/2014 5:20 PM, Mike Reublin NF4L 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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