This book has been prepared for the purpose of assisting engineers in the work of bridge design. It contains a collection of notes on various aspects of bridge design, together with necessary tables and diagrams, included also are certain standard forms relating to design and relevant specifications which the designer finds it necessary to conssult from time to time in preparing bridge designs, caluclating quantities and compling estimates of cost. The data book is not intended as a complete treatise on bridge design nor is it intended to replace “Technical instructions” but rather to supplement these instructions and to assist in the everyday application of the standards.