n4kg@juno.com wrote:
>
> Lyn, you neglected to indicate the FAILURE MODE.
>
It appeared to me that both failures were probably due to the shaft
being too short or the screw too small for the type of soil -or both-,
so the anchor worked looser with changing soil moisture over time.
> Did the SHAFT corrode? If so, how would a concrete
> anchor be less susceptible?
Neither shaft appeared to be corroded to the danger point.
> Proper size selection IS important!
>
It apparently WAS important, but my concern is that a larger size
would only have delayed the danger until corrosion could do the deed.
With an achor properly protected in concrete, I think corrosion would
be retarded as compared to an anchor in direct contact with soil.
Lyn, W4WDN
Lyn, W4WDN
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