Hello everyone and thank you in advance to all that answer my question. So here is my dilemma..I recently took the sink out of my vanity in my powder room. It left a open area that I can see inside of the vanity but it also has small pieces of wood in each corner, I guess to keep the thing from falling apart. I want to build a shallow shadow box structure and then put a 12.5lb vessel sink and about a 3 pound faucet on top. My question is how can I make this structurely sound? I have thought about putting 2x4 across the top of the vanity and then placing a piece of plywood on top of that. I only have 1 1/2 inches of height available to me. The whole area is 21X30 inches. And if I use the 2x4 can I just screw it in the vanity or should I get metal brackets? If you have any additional questions just let me and I will try to explain it...thanks again!!!!