1. Members, ASCE
2. Asst. Res. Prof., Dept. of Civ. and Envir. Engrg., Technol. Hall S201, Univ. of Alabama in Huntsville, Huntsville, AL 35899. E-mail: khalid.alshibli@msfc.nasa.gov
3. Prof., Dept. of Civ. Envir., and Arch. Engrg., Campus Box 428, Univ. of Colorado at Boulder, Boulder, CO 80309-0428. E-mail: sture@ bechtel.colorado.edu