After the publication of the third edition of this book, new AISC Specification was released in 2010 that contains combined provisions for ASD and ARFD methods and formulas in non-dimensional format to be used both for the FPS and the SI units. This fourth edition is prepared after revising the original book in the light of the new Specification of AISC 2016. The book contains tables required for the 345 Grade Steel and BS sections. The author is highly thankful to all the engineers and students who have participated in the improvement of this book through their questions and queries. As before, the detailed design procedure of the steel structures is explained in a separate book titled “Steel Structures” which frequently refers to this book for the properties tables and the design aids. Suggestions for further improvement of the presentation will be highly appreciated and will be incorporated in the future editions.

At the end of year 2005, new AISC Specification was released that contained formulas for both Allowable Stress Design and Load and Resistance Factor Design in non-dimensional format to be used for both the FPS and SI units. In year 2010, this specification for steel structures design and the seismic provisions were updated. This specification was further revised in 2016. This book is prepared in the light of the new Specifications. AASHTO LRFD Specifications are used to present the concepts of bridge loading and the design procedure. As in the first edition, in place of explaining the various aspects of design such as checking various strength capacities, stability requirements and serviceability limits in separate chapters, complete design including all the major steps of design are presented in individual units for various types of members. It is expected that this procedure gives true picture of design process to the beginners and the practicing engineers. This book is more useful if it is used along with another publication “LRFD Steel Design Aids”, termed as Design Aids in this book. The flow charts given in different sections of this book may easily be computerized to get custom-made computer programs for personal use. International system of units (SI) is used throughout the book. Suggestions for further improvement of the presentation will be highly appreciated and will be incorporated in the future editions.

This book is prepared according to the ACI Code 2019 for buildings and AASHTO LRFD Specifications for Bridges 2007. The units used throughout the presentation are the SI units, however, the expressions and examples are also given in US Customary units in the starting chapters to keep continuity with the traditional system of units. It is tried that the three main phases of structural design, namely load determination, design calculations and detailing are introduced to the beginner. This book is useful with the 2nd part of the same book. The comments on the previous editions of the book sent by colleagues, fellow engineers and students are incorporated in this edition. All persons who contributed in this regard are greatly acknowledged. Suggestions for further improvement of the presentation will be appreciated and will be incorporated in the future editions.

This book is intended for classroom teaching in architectural and civil engineering at the graduate and undergraduate levels. Although it has been developed from lecture notes given in structural steel design, it can be useful to practicing engineers. Many of the examples presented in this book are drawn from the field of design of structures. Design of Steel Structures can be used for one or two semesters of three hours each on the undergraduate level. For a two-semester curriculum, Chapters 1 through 8 can be used during the first semester. Heavy emphasis should be placed on Chapters 1 through 5, giving the student a brief exposure to the consideration of wind and earthquakes in the design of buildings. With the new federal requirements vis a vis wind and earthquake hazards, it is beneficial to the student to have some under standing of the underlying concepts in this field. In addition to the class lectures, the instructor should require the student to submit a term project that includes the complete structural design of a multi-story building using standard design procedures as specified by AISC Specifications. Thus, the use of the AISC Steel Construction Manual is a must in teaching this course. In the second semester, Chapters 9 through 13 should be covered. At the undergraduate level, Chapters 11 through 13 should be used on a limited basis, leaving the student more time to concentrate on composite construction and built-up girders.

Geschwindner's 2nd edition of Unified Design of Steel Structures provides an understanding that structural analysis and design are two integrated processes as well as the necessary skills and knowledge in investigating, designing, and detailing steel structures utilizing the latest design methods according to the AISC Code.The goal is to prepare readers to work in design offices as designers and in the field as inspectors. This new edition is compatible with the 2011 AISC code as well as marginal references to the AISC manual for design examples and illustrations, which was seen as a real advantage by the survey respondents. Furthermore, new sections have been added on: Direct Analysis, Torsional and flexural-torsional buckling of columns, Filled HSS columns, and Composite column interaction. More real-world examples are included in addition to new use of three-dimensional illustrations in the book and in the image gallery; an increased number of homework problems; and media approach Solutions Manual, Image Gallery.

This book is prepared according to the 2019 ACI Code for buildings and 2007 AASHTO LRFD Specifications for bridges. The units used throughout the presentation are the SI units according to the official system of units in Pakistan. As in Part-I of the same series of books, it is tried that the three main phases of structural design, namely load determination, design calculations and detailing are together introduced to the beginner. In this set of two books, besides the usual reinforced concrete design, retaining walls, yield line and strip method of slab design, slabs-on-grade, moment-curvature relationships, water retaining structures, prestressed concrete, dome design, special types of stairs, machine foundations, pipe design for D-load, bridge super-structure design, bridge sub-structure design, ordinary RC wall subjected to in-plane and out-of-plane bending, special RC wall, coupling beam, basics of formwork design, plain concrete properties and repair / rehabilitation of concrete structures are also presented. This book is useful with the 1st part of the same book.

Originally published in 1926 [i.e. 1927] under title: Steel construction; title of 8th ed.: Manual of steel construction.