[Greenbuilding] Fence posts--gravel or concrete

[Steve T]

I don't doubt that we could use a shallower hole if we were using
concrete, but we will not be.  I've seen what heaving has done to
fences with concrete bases here (IMHO it looks like crap) and I want
to avoid that any way I can especially since it's my fence.  It
doesn't cost me any more to dig 5 feet and the cost of the extra
gravel is negligible.  The fence that we are replacing has concrete
footings, is only 10 years old and tilts in a stiff breeze.  The
physics of the deal says the deeper the post hole, the sturdier fence
so where the previous fence builders underbuilt, I will overbuild just
so I won't have to come back to it again.
-- 
"In a time of universal deceit, telling the truth is a revolutionary act!"
-- George Orwell (Eric Arthur Blair)