1. Assistant Professor, Dept. of Construction Science and Management, Clemson Univ., Clemson, SC 29634-0507 (corresponding author).
2. Assistant Professor, Dept. of Building Construction, Virginia Tech, Blacksburg, VA 24061.
3. W. E. Jamerson Professor, Dept. of Building Construction, Virginia Tech, Blacksburg, VA 24061.
4. Dept. Head and Professor, Architectural Engineering, The Pennsylvania State Univ., University Park, PA 16802.