1. Ph.D. Candidate, Dept. of Construction Science, Texas A&M Univ., 3137 TAMU, College Station, TX 77843.
2. Ph.D. Student, Dept. of Construction Science, Texas A&M Univ., 3137 TAMU, College Station, TX 77843.
3. Associate Professor, Dept. of Construction Science, Texas A&M Univ., Francis Hall 329B, 3137 TAMU, College Station, TX 77843 (corresponding author).