I have never done or thought about doing something like this, but why
don't you dig a pit with some boards on hand and place the boards
continually at the walls of your sand pit, basically use them as
shoring, when you get to the depth you want stop and fill the shoring
with concrete using it as form work to create a concrete anchor.  Then
you could drill out holes for the winch, and install some threaded
steel robs into the concrete with epoxy.  Then you can get some nuts
and bolts and affix your winch.

On Mon, Aug 8, 2011 at 4:48 PM,  <[log in to unmask]> wrote:
>
> I have a Hobie Cat (catamaran sailboat) weighs perhaps 800 pounds.  Beaching
> it is not difficult if you have two big fraternity guys - you roll a wheeled
> cradle into the water, float the boat onto it, and manhandle the boat up the
> beach.
>
> But I am solo, and want to install a manual winch in the dune, which I can
> use to pull, or help pull, the boat up (again, on wheels, no hull-to-sand
> contact.
>
> Having almost brained myself in similar situation, does anyone have a
> brighter idea than sinking a 6x6 six feet into the sand?   (And even then
> exercising extreme caution when in operation.)
>
> Total draw distance is perhaps 20 feet, but I can do it in stages.
>
> No, there is no tree, beached battleship, huge boulder or any other  place
> to secure the winch, except a house 500 feet inland.    I do, however, have
> a 150 pound mushroom mooring which I may use.
>
> Christopher
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