1. Associate Professor and Canada Research Chair in Wind Engineering, Alan G. Davenport Wind Engineering Group, Boundary Layer Wind Tunnel Laboratory, Univ. of Western Ontario, London, Canada N6A 5B9 (corresponding author). E-mail: gakopp@uwo.ca
2. Staff Scientist, IntraRisk Division, Applied Research Associates Inc., 8540 Colonnade Center Dr., Suite 307, Raleigh, NC 27615. E-mail: jchen@ara.com