1. Lecturer, Faculty of Civil Engineering Dept., National Univ. of Modern Languages, Rawalpindi 44000, Pakistan.
2. Professor, Faculty of Civil and Environmental Engineering Dept., Univ. of Engineering and Technology Taxila, Taxila, 47080, Pakistan (corresponding author).
3. Lecturer, Faculty of Civil Engineering Dept., National Univ. of Modern Languages, Rawalpindi 44000, Pakistan; National Univ. of Sciences and Technology, Islamabad, Pakistan.
4. Ph.D. Candidate, Dept. of Civil Engineering, Univ. of North Dakota, Grand Forks, ND 58203.