Roark's Formulas for Stress and Strain 
Now updated with 30% new material, Roark Formulas for Stress and Strain, Seventh Edition, is the ultimate resource for designers, engineers, and analysts who need to calculate loads and stress. This landmark reference from Warren Young and Richard Budynas provides you with equations and diagrams of structural properties in an easy-to-use, thumb-through format. Updated, with a user-friendly page layout, this new edition includes expanded coverage of joints, bearing and shear stress, experimental stress analysis, and stress concentrations, as well as material behavior coverage and stress and strain measurement. You’ll also find expanded tables and cases; improved notations and figures in the tables; consistent table and equation numbering; and verification of correction factors.
Reviews
It is quite easy to use, and the print is clear the index is user friendly
The 4th edition has simple format, is easy to use, but lacks methods for more sophisticated hand analyses and is sparse on explanations. The 5th is best used for a doorstop.
This edition is an excellent combination of the usefullness of the 4th edition with modern and more advanced methods.
The layout of each section has excellent explanatory material and provides the simple 4th edition type equations backed with more involved/advanced formulas which are very useful.
My hat is off to the authors. This is probably the best reference for those nasty stress and deflection hand calculations we all have to do from time to time.