This a chair/end-table designed for a furniture class I took last summer. Using just three sections of half-inch plywood (in this example, birch) one can build a chair which is lightweight, strong, and easy to store. Easy to mass produce with a CNC, and only taking a couple hours work with basic hand tools (chisel and saw). The goal was to produce a cheap and effective furniture solution which doesn't use any connectors. The three sections all slot together neatly to form a well dimensioned piece of furniture which acts as both a chair and a table. Scalable for different purposes as well (my 1/2 scale mock-up makes a nice bedside table) Will upload CAD drawings soon.

My construction process involved taking the three sections and using a table saw to cut out the pre-calculated slots into each piece by cutting just short of halfway through the section with a tall blade at a 45 degree angle for the angled connections, and straight up for the non-angled cuts. Once the initial cuts are made, I went back with a Japanese saw and finished cutting the slot to the appropriate length, then used a chisel to remove the central area of the cut. Sanding the inside of the slot ensures that the pieces slot together smoothly. Any type of saw should work for this, and with care and patience you don't need a table saw. I finished mine in oil leftover from another project. This chair has been tested for individuals up to 240 pounds, but has not been tested to breaking.