ICOSSAR'09 will encompass every aspect of safety and reliability of structures and civil engineering systems, with special focus on advanced technologies, analytical and computational methods of risk analysis, probability based design and regulations, smart systems and materials, life cycle cost analysis, damage assessment, social aspects, urban planning, and commercial applications. Emerging concepts as well as state of the art and novel applications of reliability principles in all types of structural systems and mechanical components will be included. Systems for civil, marine, mechanical, transportation, and aerospace applications will be discussed.