Abstract: A barbecue grill accessory for sustaining charcoal burning in a charcoal barbecue grill has a loop form divider wall with a top and opposite bottom edge. The loop is received into a heat chamber of a charcoal barbecue grill resting on its bottom edge and divides the interior volume of the heat chamber into an inner volume and an outer volume that surrounds the inner volume. The outer volume receives the charcoal, and the divider wall supports the charcoal as it is piled up in the outer volume. The loop also allows the charcoal to be arranged in a path around the loop with a start point and an end point. The charcoal may then be ignited in the outer volume so that the charcoal burns over time through the outer volume along the path from the start point to the end point along the outer periphery of the divider loop.