Cut ribs into 4 portions. Place ribs in shallow dish.
In small bowl, combine brown sugar, paprika, onion powder, celery salt,
cumin and black pepper; rub evenly over meaty side of ribs. Cover with plastic
wrap and marinate in the refrigerator for 4 to 24 hours.
At least 1 hour before grilling, soak wood chips in enough water to cover.
Drain before using.
In charcoal grill with a cover, place preheated coals around a drip pan
for medium indirect heat. Add 1/2-inch hot water to drip pan.
Sprinkle half of the drained wood chips over the coals.
Place ribs, bone side down, on grill rack over drip pan. Cover and grill
for 1 1/2 to 2 hours or until ribs are tender. Add more preheated coals (use
a hibachi or a metal chimney starter to preheat coals) and wood chips; turn
ribs halfway through grilling.