First, this design isn't necessarily my own. It's a common mid century design that I added some of my favorite details to. Mainly the box joinery. Sorry about the images being smaller, I only took these with my iPhone and updated my progress on Instagram a while back. My Instagram is @jessemckee if you enjoy following woodworkers like I do.
I didn't come up with plans for this since I judged the height first by the height of my couch, then by proportion of the legs and box opening last. The end product ended up being 24x48" and the box is 9.5" tall and the legs are 6" tall.
My favorite wood is walnut and I ordered around 30 board feet of 4/4 S4S (surfaced on all 4 sides) from my local hardwood dealer. I ordered a bit extra for possible mess-ups, so not sure what my table ended up using.
All the materials for this project totaled to roughly $175. That's for the wood and finish.
Step 1: Thicknessing and Surfacing the Wood
I roughly cut my pieces to size with a couple inches longer than needed for good measure (in case I screwed up my box joints later) then ran all my boards through the thickness planer first to guarantee a perfect glue-up. With the wood being S4S, this saved a lot of time not having to use the jointer.
Step 2: Glue Up the Panels
I used a biscuit jointer on all the pieces for alignment as I glued everything up.
The boards all glued up. The walnut is incredible.
Step 4: Box Joints
Most of us have seen multiple variations of box jointing jigs for the table saw, but when you have a piece that is 48-50" long, that jig is a little small and I don't have the ceiling height to push the ends through my table saw. So, I made a portable jig to be used with the router that can track down the piece as I cut out each box individually. It actually didn't take long once the jig was set up. I'm sure this jig is common and has a name, but I couldn't seem to find anything so this came from my brain and probably could have been made a bit better.
Knowing that I had two lateral pieces and three vertical pieces, I wanted to cut them all at once for perfect alignment. The jig was made to sandwich all the pieces. It worked surprisingly well.
Step 5: Dry Fit
The moment of truth. The first dry fit. It was a little snug, but nothing a chisel couldn't fix. Once this worked, I was able to mark out the center mortices which was probably the scariest thing. You can see a little closer of an image of the center mortices a few images down.
Step 6: Center Mortices
For the center mortises, I took the center vertical piece and flipped it upside down on the top to mark my holes. Then on to cutting into the perfect top... Take a deep breath. I bored out most of the material using a forstner bit and chiseled the holes square. My biggest concern was that when I would push the vertical piece up the mortices from the bottom that I would blow something out, but luckily the walnut was hard enough that it held together nicely.
Step 7: Assembly and Gluing of the Box
Now to glue it up. Never enough clamps. Luckily, my workbench was super flat at the time and I used it as a reference for warp prevention.
Step 8: The Legs
Now on to the legs. I wanted the legs to be 6" tall and strong. It's a coffee table, in the center of the room and I want to put my feet on it, and sometimes I will sit on it to put my shoes on or my kid will want to crawl all over it and jump off when I'm not looking. So I decided to do open mortice and tenons to attach the feet to the aprons.
Here's my tenon jig modified to accept the angle I decided on. Maybe a 20 degree angle? I don't remember. Do whatever makes you happy.
Step 9: Legs Assembled
Here are the legs all cut, and glued up. I added some oak dowels for decoration and possible added strength. The legs attach to the box by screws.
Here's the piece before final sanding and finishing.
Step 11: The Finish
Now to disassemble and finish. I went with a satin wipe on poly from General Finishes. Around 4 coats on the entire piece and 6-7 coats on the top. Even after building up that many coats, it still feels natural and water rings still haven't shown up after a year's worth of use.
Step 12: Done
Here's the final product. I still love it and would love to build another someday just for the fun of it.