The Proceedings contain 30 papers presented at the 2nd Working Conference on "Relia.bility and Optimization of Structural Systems," London, UK, September 26 - 28, 1988. The Working conference was organized by the IFIP Working Group 7.5. The Proceedings also include 3 papers which were submitted, but for various reasons not presented at the Working Conference. The Working Conference was attended by 47 participants from 15 countries. The Conference...