1. Assistant Professor, Civil and Environmental Engineering/Building Construction Science, Mississippi State Univ., 899 Collegeview St., 128 Giles Hall, P.O. Box 9633, Mississippi State, MS 39762.
2. Assistant Professor, Div. of Construction Engineering and Management, School of Civil Engineering, Purdue Univ., 550 Stadium Mall Dr., West Lafayette, IN 47907 (corresponding author).