This book presents the basic principles involved in Analysis and Design of Reinforced Concrete Structures. This 12th edition of Vol. I has been thoroughly revised and extensively enlarged in two parts. Almost all chapters are revised with adding a plenty of new matter, examples and figures. Mix design as per latest IS:10262 with excel programs is added. A number of excel programs have been added to clarify the subject matter and design the elements of structure. As per prevailing market conditions the default combination of materials is revised to M20 grade concrete and Fe 500 grade steel, however, the other combinations of materials have not been completely ignored. The outline of the book “Reinforced Concrete Vol. I – Part II” is as mentioned below: Chapter 17 contains design of columns used in framed structures. The design interaction diagrams are derived and excel program is prepared for rectangular columns. Chapter 18 emphasis on Design of Foundations: Fundamentals. Moreover this chapter is extensively revised and soil design is sufficiently elaborated. Chapter 19 on Isolated Footings for walls and columns subjected to various types of loads. Discusses topics on axially loaded pad and sloped footing; eccentrically loaded footings; isolated slab and beam type footing; footing for multi-storeyed building columns and also gives an excel program on design of an isolated footing. Chapter 20 discusses Combined Footings for two axially loaded columns and also explains strap, strip and raft foundations. Also includes the guidelines to design a combined footing for general loading system. Chapter 21 elucidates topics on Pile Foundations such as loads on pile groups; soil design of a pile; structural design of a pile; design of a pile cap. Chapter 22 Circular raft foundations with annular and solid rafts used under circular peripheral columns or RCC shafts are discussed. Chapter 23 on Retaining walls includes design of cantilever and counterfort retaining walls.