Place spareribs in Dutch oven.
Add enough water to cover spareribs and heat to boiling.
Reduce heat; cover and simmer 1 1/2 hours or until tender.
Remove spareribs to baking dish, 13 1/2 x9x2 inches.
Stir together lemonade concentrate and barbecue sauce; pour over ribs.
Cover and refrigerate.
Grill ribs 4 inches from medium-hot coals about 30 minutes or until glazed and heated through, turning and basting ribs often with the barbecue sauce mixture.