Cardboard Cantilever Chair 2.0

Step 2 A Word on Cardboard

I got all my cardboard out of dumpster.  I would recommend you do the same.  Look for big pieces, preferably double-corrugated, as this will save a lot of time as the layers are built up.  Avoid dumpster-diving after rain or snow, and make sure pieces are relatively clean, dry, and unstained.  It is fine if they have creases or wrinkles.

Remove all the tape and staples and cut the boxes into flat pieces.  Cut them into strips 3-3/4" wide on the table saw, cutting half of them with the grain and half of them against the grain of the corrugations.  When laminating, the grain will alternate, except in the legs, which will always be oriented with the grain of the cardboard running vertically for strength. 

Cut the strips to length, about 22".  Recycle all scraps. 

The only pieces that must be mitered for strength are the leg pieces.  Cut as shown, matching the angle of the slope of the seat piece, whatever that may be in your design.  You can cut the strips to length by stacking them several high, setting an angle on a miter saw, and slicing through a bunch at once to save work.