This new, fifth edition of an extremely popular textbook continues in its tradition of presenting design procedures using a simple language, neat sketches and abundant solved problems. This book is aimed at training the students in using IS:800–2007 for designing steel structures using the limit state method. The author has explained the provisions of code in a simple language and illustrated the design procedure with a large number of worked out problems. What is new in this edition? • Two new chapters, Design of Beam Columns, and Plastic Analysis of Beams and Frames • Limit state method and working stress method compared by the aid of solving the same problems using both methods • Additional solved problems and rewriting of text throughout the text, to make the treatment more lucid