This book examines the plastic design and behaviour of main frames, both low rise industrial and agricultural, and multi-storey. Topics which concern practitioners and students alike such as member and frame stability, restraints and connections are covered in clear and detailed presentations. The explanations are backed up by a large number of diagrams and numerous worked examples. The book is published on behalf of the Steel Construction Institute and has been written on their behalf by Professor J.M. Davies of the University of Manchester and Brian Brown, chartered structural engineer.