1. P.E.
2. Res. Profl., Dept. of Civ. Engrg., Dalhousie Univ. DalTech, 1360 Barrington St., Halifax, Nova Scotia, Canada B3J 2X4.
3. Assoc. Prof., Dept. of Civ. Engrg., Dalhousie Univ. DalTech, 1360 Barrington St., Halifax, Nova Scotia, Canada B3J 2X4.