Some lakes will not allow them. I know on our lake, Kerr, the army corp
only allows the heavy black plastic foam filled floats now. I presume you
are talking about the plastic ones. Just enclose them under the dock. They
do not need to be attached unless you think you will have "heavy" seas in
your lake :-) A several hundred pound dock will hold them down. Try to get
them up into your dock frame rather than completely under it as it will
float too high otherwise. If you want you can get expanding foam
http://www.uscomposites.com/foam.html if you want it to be truly unsinkable.
Otherwise accidents and water animals might sink your dock. The fact that
they are not foam filled is one reason that some lakes outlaw them. The
plastic is also not usually uv pretected but under a deck it will take along
while for that to be a problem.

wrote in message
oups.com...
I have about 20 - 55 gallon barrels that I will seal up good and I
want to make a dock for a pond. I want a square dock that will sit
out in the middle of the pond. I would like to find directions on how
to build a dock over these drums and what would be a good way to have
a solid built dock. Any help would be appreciated.

Thanks
Scott