At the turn of the century, J. A. L. Waddell was one of the preeminent bridge engineers in the United States. His volumes on "Bridge Engineering," published around 1915, represent a comprehensive treatment of the art and science of bridge engineering up to that time. In one of those volumes, he notes that the essence of bridge engineering lies in the development of good details. This observation remains unchanged today and thus much of the detailing for long-span concrete bridges relates to the installation and anchorage of post-tensioning materials. For this reason, it seems appropriate to consider the most significant post-tensioning details forlong-span concrete bridges, including some remarks on cable stays.
