On Some Common Errors in Iron Bridge Design (Classic Reprint) - Softcover

Kernot, W. C.

9781332025732: On Some Common Errors in Iron Bridge Design (Classic Reprint)

Softcover

ISBN 10: 1332025730 ISBN 13: 9781332025732

Verlag: Forgotten Books, 2019

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Excerpt from On Some Common Errors in Iron Bridge Design

The steady though moderate demand for this small treatise and the approaching exhaustion of the first edition have led to the preparation of a second edition, amplified and brought up to date.

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.

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Excerpt from On Some Common Errors in Iron Bridge Design

In the Australian Colonies, as in other parts of the world, there is a large and increasing number of iron (in which is included steel) bridges. These bridges are of ages varying up to about fifty years. Many of them were designed at a time when the proper mode of proportioning the various parts was but imperfectly understood, while in some the material and workmanship is by no means up to the modern standards. Unlike wine, bridges do not improve with age - on the contrary, corrosion is always going on, sometimes rapidly, but generally very slowly, but no less surely, and is bound sooner or later to cause a perceptible diminution in strength. It is also thought by many that there is a tendency for the metal in course of time to become hard and brittle and so less able to endure shocks. Thus the bridges are without doubt growing weaker with effluxion of time. Meanwhile the loads they have to endure show a distinct tendency to increase. Steam rollers, traction engines, and other specially heavy loads, undreamt of at the time our earlier bridges were designed, are now common, while locomotives, with the universal call for more power, become constantly larger and heavier, and powerful continuous brakes, unknown when the earlier bridges were built, introduce longitudinal stresses of serious magnitude. From these combined causes it is plain that the margin of safety is steadily diminishing, and it is only a question of time for the point of absolute danger to be reached.

Again, there is reason to believe that many parts of the older bridges are excessively and unnecessarily strong while other portions are weak, and that the general arrangement of parts is often far from the most economical.

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.

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