Sami Khan & Martin (University of Oxford, UK) Williams 
Post-Tensioned Concrete Floors [PDF ebook] 

Post-tensioning is the most versatile form of pre-stressing, a technique which enables engineers to make the most effective use of the material properties of concrete, and so to design structural elements which are strong, slender and efficient. Design in post-tensioned concrete is not difficult and, if done properly, can contribute significantly t