Hey melliott28 ,what did you use besides glue did you use any fasteners under your boards.I am thinking of making my bench like yours .I was going to glue and maybe use kreg screws.may also use cross bracing not sure yet.any pics or info would be helpful.thanks
I only used glue (specifically Titebond III) to connect the 2x12's. I'm no woodworker, but I did some research on some woodworking forums and most of the woodworkers just use glue when making their bench tops.
I believe the key is a good glue up. I flattened both edges of the wood with an electric planer to remove the rounded edge so that they would fit together flush and I used 3/4" pipe clamps and some bar clamps to make sure I got good clamping force along the entire joint. Also, if you are going to build this type of worktop, I wouldn't use anything smaller than 2x10 lumber because the larger boards seem to be less prone to twisting and warping. Getting a good joint is extremely difficult if the lumber is twisted or warped.
I don't see anything wrong with using metal fasteners, but they really aren't necessary. I picked up the top and moved it multiple times before mounting it and it is solid and heavy. It feels just like a single slab of wood.
One more tip, I recommend using all pipe clamps because they can exert more force than bar clamps. I used the Harbor Freight 3/4" pipe clamps with the legs, and 36" lengths of threaded black pipe from Home Depot. If you use the pipe clamps with the legs, you can sit the clamps on the floor of your shop/garage, and arrange the boards on the pipe clamps while glueing them up.
I almost forgot to mention, I did attach the back edge/ back splash with screws instead of glue because I wanted to have the option of removing it.