Excerpt from On Some Common Errors in Iron Bridge Design

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.

It appeared, therefore, that a criticism of existing bridges. Would be useful not only to the designer of new structures anxious to avoid the defects of the older ones, but also, and perhaps in an even greater degree, to the man who has received a legacy of imperfect structures from his predecessors, which he is desirous of utilizing as far as possible by judicious repairing and local strengthening, for it is to be noted as a good point of many of our defective bridges that they are like chains, most of the links of which are abundantly strong while occasionally a very weak one is found, which governs the strength of the whole and that thus a comparatively inexpensive local reinforcement may improve the whole structure to a very large and valuable extent.

I shall now proceed as brieﬂy as is consistent with clearness to point out what I consider to be the principal errors in structures that have come under my notice, and indicate how their defects may be remedied,' if remediable, in existing and avoided in future structures.

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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

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.

It appeared, therefore, that a criticism of existing bridges. Would be useful not only to the designer of new structures anxious to avoid the defects of the older ones, but also, and perhaps in an even greater degree, to the man who has received a legacy of imperfect structures from his predecessors, which he is desirous of utilizing as far as possible by judicious repairing and local strengthening, for it is to be noted as a good point of many of our defective bridges that they are like chains, most of the links of which are abundantly strong while occasionally a very weak one is found, which governs the strength of the whole and that thus a comparatively inexpensive local reinforcement may improve the whole structure to a very large and valuable extent.

I shall now proceed as briefly as is consistent with clearness to point out what I consider to be the principal errors in structures that have come under my notice, and indicate how their defects may be remedied,' if remediable, in existing and avoided in future structures.

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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