replying to EXT, Doubts in S. Florida wrote:
Thanks for all the replies folks.
Decided on a 6" auger bit, digging 4' down, using 10' PT 4x4 posts. Will pack
with pea gravel below and on the sides. Possibly install a concrete collar at
the top. In this case, I think 4' depth with pea gravel will be better than 2'
concrete footer. And for all you code-junkies out there, I understand your
point, but I've seen too many new/newer PERMITTED fences with 8' post spacing
and most without concrete footers, how is this worse than those? The original
fence posts are 4x4's, spaced 8' apart, and have lasted 30 years and at least 30
hurricanes/tropical storms without concrete. One 4x4 that lines a driveway is
set in concrete and it has been replaced 3 times in as many years due to
rotting. And seriously, who has ever inspected fence posts before buying? If a
fence was built before the new codes - it would be grandfathered in (I know that
is not the case here).
Please explain how a rotten post with a concrete footer will be safer than a 4'
deep compacted gravel hole? If anything, the rotten post will snap off,
supplying shrapnel to hurricane-force winds. A loose post will just lean and
decrease wind loading as it leans.