1. Dr.Eng., Institute for Structural Design, Graz Univ. of Technology, Technikerstrasse 4–IV, A-8010 Graz, Austria. E-mail wallner@bemessung.com
2. Centre for Construction Technology and Research, Univ. of Western Sydney, Locked Bag 1797, Penrith South DC, NSW 1797, Australia. E-mail: martin@abes-australia.com