Under fire conditions, the strong interactions in structures result in different load carrying mechanisms and drastic redistributions of internal forces in structural members, which are concentrated at and transferred via connections. Fire safety depends on the performance of these connections, including their temperature distribution and load-carrying mechanisms, and good performance ensures structural robustness in fire. Behaviour and Design of Steel and Composite Connections in Fire is the only dedicated book on fire performance of connections in steel and composite structures. Recent experimental and numerical studies, from individual elements to whole, real-scale structures, have indicated that connections are among the most vulnerable and critical parts of these structures. This book synthesises the research findings on this important subject and explains the essential features in an accessible way in one single source. The book is ideal for researchers, structural engineers and fire protection engineers in their applications of performance-based fire engineering.