Recycled cardboard tubes (found in dumpster behind print shop), modified to fit standard Ikea bed slats, plus routerred support legs. Vancouver, 2006. Used as my primary bed for five years before moving apartments, after which I recycled the bed.
Bed legs—the diametre of the tubes happened to match the diametre of the rotary sander.
Reclaimed cardboard paper tubes for the horizontal slat supports.