1. Senior Lecturer, Dept. of Civil and Environmental Engineering, The Univ. of Auckland, Private Bag 92019, Auckland, New Zealand.
2. Contract Administrator∕Estimator, LH Building Services P∕L, P.O. Box 1044, Menai Central, NSW 2234, Australia.
3. Graduate Student, Dept. of Civil and Environmental Engineering, The Univ. of Auckland, Private Bag 92019, Auckland, New Zealand,