1. Assistant Professor, Dept. of Building Construction, Virginia Tech, 410B Bishop Favrao Hall 0156, Blacksburg, VA 24061 (corresponding author).
2. NCSA Faculty Fellow and Assistant Professor, Dept. of Civil and Environmental Engineering and Dept. of Computer Science, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801; formerly, Assistant Professor, Dept. of Civil and Environmental Engineering, Virginia Tech, 113-C Patton Hall 0156, Blacksburg, VA 24061.
3. Graduate Research Assistant, Dept. of Building Construction, Virginia Tech, 410 Bishop Favrao Hall 0156, Blacksburg, VA 24061.