Packed with plenty of clear illustrations, this introductory work shows how to use the matrix methods of structural analysis to predict the static response of structures. Sack emphasizes the stiffness method while providing balanced coverage of the fundamentals of the flexibility method as well. He introduces the various topics in a logical series and develops equations from basic concepts. The result: readers will gain a firm grasp of theory as well as practical applications. Practical in approach, the well- presented material in this volume is devoted to giving a solid understanding of matrix analysis methods combined with the background to write computer programs and use production-level programs to build actual structures.