This book, Analysis and Design of Steel and Composite Structures offers a comprehensive introduction to the analysis and design of both steel and composite structures. Design of steel and composite structures is the design of compression members, effective lengths of columns, design of plate girders design by buckling analysis, design of portal frames, behaviour and design of beam-columns, connection design, plastic design (beams, simple frames), composite steel-concrete structures, elastic and rigid plastic analysis of composite beams, composite columns, composite connections. Composite construction is the dominant form of construction for the multi-storey building sector. Its success is due to the strength and stiffness that can be achieved, with minimum use of materials.