In the Seventh Edition of the book, the Author has revised the complete text of the book in S.I. Units Practically. The diagrams for the standard train of railway and highway bridge loads have been retained in metric units. The design of light gauge steel structural members in general building construction has been revised as per code of Practice IS: 801-1975. The various expressions for the determination of effective width of elements and for the allowable design stresses and other have been given in S.I. Units along with the respective expressions in metric units for the purpose of authenticity. The illustrative examples for the analysis of multistorey buildings subjected to lateral loads have been explained by given free body diagrams for the members and joints for the internal forces.