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posted to rec.boats.building
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First recorded activity by BoatBanter: Nov 2008
Posts: 56
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Dock building
Brian Whatcott wrote in
:
Jim Willemin wrote:
Brian Whatcott wrote in
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Dan Listermann wrote:
I want to build two docks, one permanent and a floating one. The
floating one will be supported by 15 gallon plastic drums. I can
get 55 gallon, but for a 4 x 8 dock, I worry about center of
gravity issues.
The permanent one will be built of 55 gallon drums filled with
dirt. Any issues to look out for?
Might you consider using 55 gal drums instead of 15 gallon drums,
and part fill the big drums with 10 gallons of dirt of specific
gravity 4 ( = 4 times as dense as water...)
That would put the CofG lower than the 15 gal drums.....
Brian W
Where do you get dirt that dense? Most rock is around 2.5 to 2.7;
green foundry sand is around 3, and that is about as dense as you get
without going to something like pig iron.
Hehe...look: someone paying attention! If I said "fill the drum to
leave 15 gal worth of buoyancy", would that be better?
:-)
Brian W
Yup. 
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