1. Assistant Professor, Dept. of Architect and Architectural Engineering, Yonsei Univ., Seoul 03722, South Korea (corresponding author).
2. Construction Engineer, Al Engineers, Inc., Middletown, CT 06457.
3. Assistant Professor, Dept. of Construction Management, Western Carolina Univ., Cullowhee, NC 28723.
4. Associate Professor, Dept. of Civil and Environmental Engineering, Seoul National Univ., Seoul 151-744, South Korea; Adjunct Professor, Institute of Construction and Environmental Engineering, Seoul, South Korea.
5. Professor, Dept. of Architectural Engineering, Chung-Ang Univ., Seoul 156-756, South Korea.