1. Associate Professor, Dept. of Civil Engineering, Kasetsart Univ., 50 Ngamwongwan Rd., Ladyao, Jatujak, Bangkok 10900, Thailand (corresponding author).
2. Lecturer, Division of Building Technology, Kasetsart Univ., 50 Ngamwongwan Rd., Ladyao, Jatujak, Bangkok 10900, Thailand.
3. Researcher, Dept. of Civil Engineering, Kasetsart Univ., 50 Ngamwongwan Rd., Ladyao, Jatujak, Bangkok 10900, Thailand.