Ron.....
Here are pictures of my pad project this past Spring.
The guy that did mine used rebar.
I think we went with a 4 or 4.5 in thick slab.
He said to not place the tub on pad for
at least 72 hours...something about curing.
It cost me $500 to have the pad done.
If I had it to do over again I might have
him round the corners of the slab, but it
is no biggie because it's covered with deck
now anyway.
Personally I prefer decking around
the edges my tub instead of concrete.
HIDE THOSE UGLY WIRES! FINISHED PRODUCT BELOW!