1. Associate Professor, Charles Durham School of Architectural Engineering and Construction, College of Engineering, Univ. of Nebraska-Lincoln, 1110 S. 67th St. Peter Kiewit Institute (PKI) 104C, Omaha, NE 69182 (corresponding author).
2. Graduate Research Assistant, Charles Durham School of Architectural Engineering and Construction, College of Engineering, Univ. of Nebraska-Lincoln, 1110 S. 67th St. Peter Kiewit Institute (PKI) 118A, Omaha, NE 68182.
3. Assistant Professor, Dept. of Construction Management and Engineering, College of Engineering and Architecture, North Dakota State Univ., Old Architecture Bldg. 118 G, Dept. 2475 P.O. Box 6050, Fargo, ND 58108-6050.
4. Associate Professor, Civil Engineering Dept., Inha Univ., 253 YongHyeon-dong, Nam-gu, Incheon 402-751, Korea.