One of the book's strongest sections deals with the substructure—specifically piers, abutments, and foundations. It delves deep into the design of well foundations (a staple in Indian bridge construction over major rivers), open foundations, and pile foundations. The step-by-step design procedures provided are highly practical.

Bridge engineering is a specialized branch of civil engineering that demands a synthesis of aesthetic judgment, structural analysis, and practical construction knowledge. The book Bridge Engineering by S. Ponnuswamy is regarded as a seminal text, particularly in the context of Indian standards and practices, though its principles apply globally. The text serves as a comprehensive manual, guiding the reader from the preliminary stages of selection and planning through to the intricate details of design and maintenance.

: Hydraulic design (flood discharge, linear waterway) and loading standards (IRC/IRS).