Download or read book The Evolution of Vertical Lift Bridges written by Henry Grattan Tyrrell and published by . This book was released on 1912 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Evolution of Vertical Lift Bridges Classic Reprint written by Henry Grattan Tyrrell and published by Forgotten Books. This book was released on 2016-08-30 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Evolution of Vertical Lift Bridges Though the accuracy of these early traditions will probably remain shrouded in mystery, it is well known that movable bridges of the bascule type were very common during the Middle Ages, especially at the approaches to castles and walled cities, and quite elaborate drawings of such bridges are still extant, exhibiting a degree of inventive skill that has not been surpassed even in our own time. Indeed, most of the patented inventions of the last twenty years are merely revivals of earlier ones which were studied out or built during previous centuries. And many features of modern bridges, originality for which is claimed by recent proprietors, are found to have been in use long before the advent of the present generation. There is, therefore, no branch of engineering in which a knowledge of history is more essential. Movable bridges of the direct lift form are, however, of more recent origin, one of the first appearing previous to 1840, in the wooden trestle of twenty-three spans, over the Danube River at Vienna, the oor over one 30 foot opening being arranged to lift 6% feet. There was also, in 1846, on the Amsterdam and Rotter dam Railway, over the Poldervaart - a canal on the Folders - a bridge with two side openings of 21 feet and a center one of 13 feet, the last capable of being lifted about 5 feet vertically, by means of a crab and screw worked by hand power. It was a small structure, only 55 feet long and 10% feet wide, with oor less than 10 feet above water. Piers were on a slight skew and were founded on piles. The next vertical lift bridges appeared in England, two being placed over the Grand Surrey Canal at London under the direction of Robert J. Hood, to carry the Thames Junction branch of the London, Brighton and South Coast Railway. These bridges crossed the canal and tow path and the larger one had a Span of 35 feet between tower faces, though the channel opening was only 21 feet. It was 83 feet wide with a rail-track on one side. The moving platform, weighing 12% tons, was suspended by wire ropes over sheaves on top of four disconnected cast iron towers, and the 12% tons of counterweight descended into underground cast iron cylinders. It could be lifted by two men on a hand winch, the greatest rise being only 5 feet. The other bridge over the same canal was 12% feet wide and 31% feet long, the upper end of towers being connected by braces with curved bottom cords. Chains were used for the suspenders instead of ropes, and the rear tower faces were curved, giving them a graceful appearance. The total cost of the latter was These two bridges over the Grand Surrey Canal, were probably the first properly constructed ones of the vertical lift type, and for more than sixty years have served as pro totypes for many later and larger ones. 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."
Download or read book The Evolution of Vertical Lift Bridges written by H. g. b. 1867 Tyrrell and published by Palala Press. This book was released on 2015-12-06 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book EVOLUTION OF VERTICAL LIFT BRI written by H. G. (Henry Grattan) B. 1867 Tyrrell and published by Wentworth Press. This book was released on 2016-08-26 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book The Evolution of Vertical Lift Bridges written by Henry Grattan Tyrrell and published by Alpha Edition. This book was released on 2019-06 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has been considered by academicians and scholars of great significance and value to literature. This forms a part of the knowledge base for future generations. We have represented this book in the same form as it was first published. Hence any marks seen are left intentionally to preserve its true nature.
Download or read book Scherzer Rolling Lift Bridges Classic Reprint written by Albert H. Scherzer and published by Forgotten Books. This book was released on 2017-11-16 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Scherzer Rolling Lift Bridges The Essential Requirements of a Movable Bridge Are 1. The bridge must be absolutely safe for all traffic cross ing it and for traffic using the navigable channel. 2. The bridge must cause the least possible delay to the traffic crossing it and to the traffic using the navigable channel. 3. The bridge should provide the widest possible navi gable channel at a minimum cost. 4. Economy of first cost of the bridge, economy of opera tion and economy of maintenance. 5. Economy of space required for the site and operation of the bridge. 6. The bridge must not encroach on the adjacent dock space. 7. The bridge should provide one ample, unobstructed navigable channel in the middle of the waterway. 8. The main structural moving parts of the bridge should be few and simple. 9. The bridge should move with the least possible fric tion because of its comparatively great weight. Io. The operating machinery, locks and equipment of the bridge should be few and simple. II. The bridge should be very rapid in operation. 12. When open, the bridge should form a barrier closing the highway. 13. The bridge should be as rigid as a fixed bridge, under the heaviest moving loads for both highway and railway traffic. I4. The bridge should have pleasing and artistic outlines. 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.
Download or read book History of Bridge Engineering Classic Reprint written by Henry Grattan Tyrrell and published by Forgotten Books. This book was released on 2017-10-17 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from History of Bridge Engineering History is very fully taught in Schools of Architecture, but up to the present, very little time or thought has been given in the Engineering Schools to the History of Engineering, which is cer tainly quite as worthy of attention. The absence of such courses is generally ascribed to insufficient time and the dearth of litera ture. A need for this book is therefore evident, especially as there is at present no other on the subject in the English language. 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.
Download or read book The Design and Construction of Metallic Bridges Classic Reprint written by William H. Burr and published by Forgotten Books. This book was released on 2017-12-03 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Design and Construction of Metallic Bridges This book is based upon the ninth edition of The Stresses in Bridge and Roof Trusses, Arched Ribs, and Suspension Bridges, by one of the Authors of this volume. T hat work, however, has been so thoroughly rewritten and such a large amount of new matter has been introduced that a new title has been' adopted. It has been the intention of the Authors to prepare a comprehensive book covering all types of trusses used to a material extent in American bridge practice, or at least all trusses forming the basis of that practice. In con formity With this plan, the most advanced methods of stress computations, as well as those that are older, have been employed. 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.
Download or read book Vertical Lift Bridges written by William Durward Connor and published by . This book was released on 1912 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Tower Bridge written by John Wolfe Barry and published by Forgotten Books. This book was released on 2018-01-22 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Tower Bridge: A Lecture Before entering upon a description of the structure of the Tower Bridge, it may be interesting if I touch first upon the history of the principal bridges of London, and then upon the necessity of means being afforded for crossing the river below London Bridge, with a glance at the various suggestions which have been made to meet the want. 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.
Download or read book Movable Bridges Vol 1 of 2 Classic Reprint written by Otis Ellis Hovey and published by . This book was released on 2015-08-05 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Movable Bridges, Vol. 1 of 2 This book was written because it was believed that a practical treatise on the design of movable bridges and their machinery would be of interest and value to practicing engineers and advanced students in engineering schools. Many authors have treated the design of the superstructure of movable bridges in connection with that of fixed spans, but few have discussed the special problems peculiar to the arrangement and design of the machinery. The data formerly available in this important branch of the subject were scattered through treatises on machine design, handbooks, the technical periodicals, and the publications of engineering societies; or had been developed by the engineers of manufacturing bridge companies and closely held for their own use. One of the objects of this book is to collect and arrange the best of this material in convenient form for study and use, and to put the results of original investigations and the lessons learned from long experience before fellow-engineers, in the hope of rendering a real service to the profession. After a brief history of the development of early designs, the various types of bridges are discussed, and enough statistical information is given to assist in determining the most desirable type of bridge for particular conditions; and also to serve as a basis for preliminary calculations. The various methods of stress analysis are so well known that only a brief statement of some of the simplest and most practical is given. The chapter on the elastic deflections of structures has been made more complete. The chapter on details of design includes discussions of camber, end-lifting mechanism, disc and roller-bearing centers, and other details which apply to swing bridges. The analysis of end-lifting mechanism, and the illustrative example are typical of convenient and practical methods which may be applied to the design of similar mechanism for other purposes. End-rail joints, operators' houses, and counterweights are treated briefly in the remaining chapters. Appendix A gives an analysis of the stresses in lenticular discs, and Appendix B proposes a new method for the design of the tread plates on the supporting and segmental girders of rolling-lift 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.
Download or read book The Architecture of Bridges Classic Reprint written by Elizabeth B. Kassler and published by Forgotten Books. This book was released on 2017-10-28 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Architecture of Bridges Since the reality of a bridge lies in its structure, the art of bridge building lies in the recognition and development of the beauty latent in those structural forms that most effectively exploit the strength and special properti'es of a given-material. 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.
Download or read book Maximum Stresses in Framed Bridges Classic Reprint written by William Cain and published by . This book was released on 2015-08-05 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Maximum Stresses in Framed Bridges The first edition of this work was published in Van Nostrand's Magazine for 1878, and was largely concerned with the comparison of the weights of bridges and their most economical depths. These subjects have now been practically solved by bridge engineers, and the result has been the elimination of many types of bridge truss once popular and the retention, by the principle of the "survival of tho fittest," of certain leading forms that have proved most economical and otherwise desirable. From these considerations, it was thought best to confine the present edition to the discussion of those types most used at present, and to leave out any comparison of weights and extended discussions as to minimum material. 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.
Download or read book Suspension Bridges Arch Ribs and Cantilevers Classic Reprint written by William Hubert Burr and published by Forgotten Books. This book was released on 2016-08-23 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Suspension Bridges, Arch Ribs and Cantilevers The assumption in the method of de ections that all moving load is uniformly distributed over the span in determining the expression for the work involved through vertical de ection, as a general procedure, is certain open to serious criticism, as will be indicated. A full consideration, therefore, of all the features of the two methods justifies the use of the Method of Least Work, especially with the adjusted centre sag, as being at least equally accurate with the method of de ections, while its equations are certainly simpler and more easily workable. 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."
Download or read book A Practical Treatise on Suspension Bridges written by D. B. Steinman and published by . This book was released on 2015-08-05 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from A Practical Treatise on Suspension Bridges: Their Design, Construction and Erection This book has been planned to supply the needs of practicing engineers who may have problems in estimating, designing or constructing suspension bridges, and of students who wish to prepare themselves for work in this field. The aim has been to produce an up-to-date, practical handbook on the subject, distinguished by simplicity of treatment and convenience of application. In the first division, on Stresses in Suspension Bridges, the formulas have been corrected to conform, to modern practice, and reduced to their simplest and most convenient form for direct application by the designing engineer. The formulas are supplemented by curves for their expeditious solution, and by alternative graphical methods for determining stresses. The second division, on Types and Details of Construction, presents data and illustrations to assist the designing engineer in the selection of type of suspension bridge and in the determination of proportions, specifications, and details for the various elements of suspension construction. The third division, on Typical Design Computations, gives numerical examples of suspension designs of different types worked out by methods that have proved most efficient in the author's practice. The designing engineer will find here the formulas to be used in each successive step of the design, and the practical methods of applying them, with tabulations, graphs and short-cuts. The fourth division, on Erection of Suspension Bridges, describes and illustrates the successive stages in the erection of representative structures, from towers to trusses. The operations of stringing wire cables are presented in detail, with an outline of the computations for adjustment and control. 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.
Download or read book A Memoir on Suspension Bridges written by Charles Stewart Drewry and published by Forgotten Books. This book was released on 2016-10-30 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from A Memoir on Suspension Bridges: Comprising the History of Their Origin and Progress, and of Their Application to Civil and Military Purposes; With Description of Some of the Most Important Bridges Author has thus availed himself, he takes this Oppor tunity of acknowledging his obligations and as he has generally been careful to cite his authorities, his readers will know both to whom to assign the credit. 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.
Download or read book History of the Tower Bridge written by Charles Welch and published by Forgotten Books. This book was released on 2017-10-27 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from History of the Tower Bridge: And of Other Bridges Over the Thames Built by the Corporation of London 4. The Story of the Tower Bridge Chapter III. - Description of the Tower Bridge, its Design and Construction. 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.
