Reply by BinghamtonEd

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Posted on plywood carcass construction dado depth

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2298 posts in 2395 days

#1 posted 01-17-2013 06:02 PM

I’m in the process of building a kitchen island for my wife, and just glued/screwed the cabinet box together yesterday. The box has the bottom and one shelf. Sides and horizontal pieces were made out of 3/4” ply, with dadoes 3/8” deep. Back was 1/2”, with 1/4” dadoes for the horizontal pieces. Strips of 3/4” pocket-screwed across the top to fasten the top to. Bottom shelf also is screwed in from outside of cabinet through the dadoes (to be covered in trim later). Overdone? Maybe. But when it came time to assemble the whole thing, it all came together rock solid and square. I should also note that this is a mobile island with a butcher-block top, so it will be going through slightly more stress than some other basic cabinets might.

On a side note, like others have said, measure your plywood first. I bought plywood listed as 23/32, used a 23/32 dado bit and come to find out, nothing fit, because the plywood was actually 3/4”. Rather than re-route all of my dadoes on the sides and back, I just used the dado bit to cut a 1/32” rabbet on the undersides of the bottom and shelf to bring the mating thickness down to 23/32.

-- - The mightiest oak in the forest is just a little nut that held its ground.

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