These two volumes of proceedings contain 9 invited keynote papers and 126 contributed papers to be presented at the Second International Conference on Advances in Steel Structures held on 15-17 December 1999 in Hong Kong. The conference is a sequel to the International Conference on Advances in Steel Structures held in Hong Kong in December 1996. The conference will provide a forum for discussion and dissemination by researchers and designers of recent advances in the analysis, behaviour, design and construction of steel structures. The papers to be presented at the conference cover a wide spectrum of topics and were contributed from over 15 countries around the world. They report the current state-of-the art and point to future directions of structural steel research.