1. Assistant Professor, Construction Engineering and Management Division, Charles Durham School of Architectural Engineering and Construction, Univ. of Nebraska-Lincoln, W145 Nebraska Hall, Lincoln, NE 68588 (corresponding author).
2. Assistant Professor, School of Civil and Environmental Engineering, Oklahoma State Univ., 207 Engineering South, Stillwater, OK 74078.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois, 205 North Mathews Ave., Urbana, IL 61801.
4. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2350 Hayward St., Room 2340, G.G. Brown Building, Ann Arbor, MI 48109.