1. Asst. Engr., W. S. Atkins and Partners, Epsom, Surrey, England, formerly Research Student, Dept. of Civ. and Struct. Engrg., Univ. of Sheffield, Sheffield, England, S1 3JD
2. Lect., Dept. of Civ. and Struct. Engrg., University of Sheffield, Sheffield, England, S1 3JD
3. Sr. Leet., Dept. of Civ. and Struct. Engrg., Univ. of Sheffield, Sheffield, England, S1 3JD