The settlement kept taking place even after the reinforcement in this Ulsan's SL facility. After the first JP reinforcement in 2010, a defect was not found so the basic reinforcement took place again in 2012. the last reinforcement was completed in 2013.
1st construction, basic reinforcement restoration construction
2nd construction, car part facility running while reinforcement is taking place
3rd construction, take reinforcement while people are working inside