Excerpt from Theory and Design of Reinforced Concrete Arches: A Treatise for Engineers and Technical Students Of all the problems in bridge designing the analysis of the elastic arch is by far the most difficult. The works which have heretofore appeared on this subject are either so mathematically abstruse, or leave so much to the reader to demonstrate for him self, that they are of little value to the practical engineer or to the technical student whose mathematical training has not been of exceptional order. The entire absence in technical literature of a work obviating these unfortunate features has been brought so forcibly to the attention of the author that he has felt justified in undertaking the present work. It was felt that the graphical method of analysis would be preferred by both engineers and technical students to the longer and more involved mathematical method of analysis. Every principle involved in the graphical treatment is ex plained thoroughly and in detail in the theoretical portion of the work. There are no missing steps in the necessary mathematical analysis of the theory as set forth in the present treatise. The author has in preparation a companion volume to the present one, which will treat of hinged arches and unsymmetrical arches. The author wishes to express his indebtedness to the classic work of Professor Henry T. Eddy, and to the works of Professor William Cain. He also desires to express his sincere appreciation to Mr. Roy Malony, B. S. In C. E., for making the drawings for the plates; to Mr. Avery F. Crounse, B. S. E., for checking the stress calculations: to Mr. Charles F. Smith, bridge engineer (graduate of Engineering Department, U. S. Military Academy, West Point), for the final reading of the manuscript: and to Mr. A. D. Butler, B. S. In C. E., for critical reading of proofs. The author is especially grateful to the publishers for the splendid aid they have extended him and for the exceptional care they have taken in the production of this work. Through the courtesy of the Concrete Steel Engineering Com pany of New York the author is able to include in the present work the specifications of that company for reinforced concrete bridges. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.