1. Quantity Surveyor, WT Partnership, 40 Creek St., Brisbane, QLD 4001, Australia.
2. Associate Professor, Dept. of Civil and Environmental Engineering, Seoul National Univ., 1 Gwanak-Ro, Gwanak-Ku, Seoul 08826, Korea; Adjunct Professor, Institute of Construction and Environmental Engineering (ICEE), 1 Gwanak-Ro, Gwanak-Ku, Seoul 08826, Korea (corresponding author).
3. Professor, School of Civil Engineering and Built Environment, Queensland Univ. of Technology, 2 George St., Brisbane, QLD 4000, Australia.
4. Lecturer, School of Civil Engineering and Built Environment, Queensland Univ. of Technology, 2 George St., Brisbane, QLD 4000, Australia.
5. Graduate Student, Dept. of Civil and Environmental Engineering, Seoul National Univ., 1 Gwanak-Ro, Gwanak-Ku, Seoul 08826, Korea.