Part of my kitchen reno job was to take out a wall and re-route a heat
duct that had been in that wall. I was going to run it between the
floor joists in the basement and up through the floor underneath one
of my kitchen cabinets, and out the front similiar to a kick space
heater. It's actually a 36"X36" lazy susan. I don't have the cabinets
yet , but I wanted to at least rough in the ductwork before laying my
tile down. My question is are these cabinets pretty much hollow on the
bottom? Or are there supports at various locations?