1. Research Scholar, Centre for Innovative Construction Technology, Dept. of Civil Engineering, Faculty of Engineering, Univ. of Malaya, Kuala Lumpur 50603, Malaysia.
2. Associate Professor, Centre for Innovative Construction Technology, Dept. of Civil Engineering, Faculty of Engineering, Univ. of Malaya, Kuala Lumpur 50603, Malaysia (corresponding author).
3. Professor, Centre for Innovative Construction Technology, Dept. of Civil Engineering, Faculty of Engineering, Univ. of Malaya, Kuala Lumpur 50603, Malaysia.
4. Senior Lecturer, Centre for Innovative Construction Technology, Dept. of Civil Engineering, Faculty of Engineering, Univ. of Malaya, Kuala Lumpur 50603, Malaysia.