Let’s say you are designing a post-tensioned slab for a parking garage. Open the Leonhardt PDF to Chapter 8 (Construction). You will find:
Then flip to Chapter 5 (Losses). Leonhardt provides a manual calculation method for friction loss that is far more transparent than the output of a software like ADAPT or RAPT. By running his hand calc once, you will understand why the software gives certain numbers. Steel (tendons):
Because the original 1964 English edition is out of print, many engineers turn to scanned copies circulating in academic repositories or engineering forums. However, beware of poor quality. A good prestressed concrete design and construction fritz leonhardt pdf should have: Grout and duct materials:
Note on Copyright: While Leonhardt passed away in 1999, his work is still under copyright protection in most jurisdictions (life + 70 years). However, some universities have made excerpts available for educational use. Always check your local laws. If you need a legal alternative, Wilhelm Ernst & Sohn has published later editions of "Beton-Kalender" which include updated chapters by Leonhardt’s students. Let’s say you are designing a post-tensioned slab
If you want a detailed, fully worked numerical design (with code-based checks, calculations of prestress losses, section design, shear/torsion checks, and drawings) for a specific member type and span, provide the span, loads, desired concrete and tendon materials, and whether you prefer pre- or post-tensioning; I will deliver a step-by-step calculation set.
Many existing bridges and parking garages built in the 1960s–1980s used prestressing systems that are now obsolete. If you are tasked with inspecting or retrofitting such a structure, Leonhardt’s descriptions of those original systems are invaluable. The PDF contains crisp line diagrams of tendon profiles and anchor heads that you won’t find in any modern code.