Inquiry:
Is it possible to put a grill rack on top so that flat bottom pans less then 13 inches can be used?
Outdoorstirfry:
Yes, a grill rack can sit on top of the stove. The stove surface is non-symmetrical. You will need to orient the rack to find a stable position. When you cook, flame will come around your pot, everything including the rack will be hot. Just be cautious.