I'm going to put a raised deck in my boat and was wondering if 1/8" alum. would be thick enough? I plan on putting 1" square alum. stock every foot for support. (joists) Just wondering if the sheet stock is thick enough. Thanks

Doug

Should be.  You might have to add an X-brace between the joists, but maybe not.  Best bet would be to get it built and stand on it before you bolt it/ weld it together.  I'd think 1/8" would be plenty though...

-J

What is the hull thickness of your boat?

1/8 = 0.125

If you could find a small piece of 1/8" aluminum sheet at the scrap yard and screw it down it would answer your question without forking out the money for a whole sheet.  I bet it comes in 4'x8' sheets new.