1. Senior Structural Engineer, Halcrow Yolles, 207 Queen’s Quay W., Suite 550, Toronto, Ontario, M5J 1A7, Canada; also, Adjunct Professor, Dept. of Civil Engineering, Univ. of Toronto, 35 St. George Street, Toronto, Ontario, M5S 1A4, Canada (corresponding author).
2. Structural Designer, Halcrow Yolles, 207 Queen’s Quay W., Suite 550, Toronto, Ontario, M5J 1A7, Canada.
3. Graduate Student, Dept. of Civil Engineering, Univ. of Toronto, 35 St. George Street, Toronto, Ontario, M5S 1A4, Canada.
4. Professor, Dept. of Civil Engineering, Univ. of Toronto, 35 St. George Street, Toronto, Ontario, M5S 1A4, Canada.