I have a question: , or two?
If we are planning on six inches of water, why are
we making it two and a half feet tall? Engineer thing?
If cost is a factor why are we making it two and
a half feet high?
If cost is a factor why are we using what appears to
be 2"X stock for the tank? Are we making "heavy"
I am not making light of your project, just trying to
help in my own way.
By my figures, a 6'x6' tank with six inches of water
in it generates about .16 psi at the bottom of the
Using 3/4" stock, 1/4" ply bottom with some
supports, making it 12" high, 100% safety factor,
lined with $5 Wal Mart tarp, you should save enough
money to take all the forum members to McD's for
BTW, I build boats, they are just tanks that hold
air to keep the water out.
Edit, one other thing, is the 6' 11" thing important?
It drivers the cost up. A 6'X6' would be cheaper in
that there would be a lot less waste when using 4X8
sheets of ply.
In fact, the whole tank could be made of 1/4 ply with
just a bit of bracing.