1. Graduate Student, Dept. of Civil, Surveying, and Environmental Engineering, Univ. of Newcastle, NSW, 2308 Australia.
2. Associate Professor, Dept. of Civil, Surveying and Environmental Engineering, Univ. of Newcastle, NSW, 2308 Australia.
3. Richardson Chair in Wood Engineering, Professor of Forest Products and Civil Engineering, Dept. of Wood Science and Engineering, Oregon State Univ., Corvallis, OR 97331-5751.