1. Prof., Dept of Civ. and Envir. Engrg., Univ. of Alberta, Edmonton, AB, Canada T6G 2G7. E-mail: abourizk@civil.ualberta.ca
2. Proj. Coordinator, PCL Construction Management Inc., Build. 4, 5400–99 St., Edmonton, AB, Canada T6E 3N7. E-mail: pknowles@pcl.ca
3. Sr. Engr., PCL Industrial Constructors Inc., 5402–99 St., Edmonton, AB, Canada T6E 3N7. E-mail: Rhhermann@pcl.ca