1. Research Development Team, GS E & C Research Institute 417–1 Deokseong-ri Idong-myeon Cheoin-gu Yongin-si, Gyeonggi-do, 449–831, Korea
2. Structure Research Department, Korea Institute of Construction Technology 2311 Daehwa-dong, Ilsan-Gu, Gyeonggi-Do 411–712, Korea
3. Jaram Technology Co. 1112 KOLON Digital Tower Villant 222–7, Guro-dong, Guro-Gu, Seoul 152–050, Korea