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Publisher: Forgotten Books

Published: 2018-03

Total Pages: 408

ISBN-13: 9780666693518

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Excerpt from Good Roads, Vol. 4: A Practical Journal of Road and Street Construction and Maintenance, July December, 1912 The introduction of hinges in concrete arches to pro vide for unequal settlement is absolutely useless, accord ing to Mr. Luten. If the arch is a solid rib, hinges par allel to each other cannot relieve unequal settlement, and if it is made up of separate ribs, hinged separately at the crown or at the spring lines or both, the presence of the hinges may permit unequal settlement of the ribs and their supporting footings. But these ribs must support columns carrying a solid concrete floor, and any unequal settlement of the footings and ribs will necessarily cause an unequal settlement of the floor slab, which is, of course, incapable of withstanding it. The most useful purpose of a hinge in an arch, according to Mr. Luten, is to locate the thrust line and reduce a complex analysis to a simple calculation through the use of a complicated and expensive device in the actual construction. The use of the hinge in such an arch by an expert designer is rarely justified, he helds, and is an admission of inability to employ the elastic theory to make the necessary analysis of the proper arch ring. 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 Good Roads, Vol. 4 written by and published by Forgotten Books. This book was released on 2018-03 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Good Roads, Vol. 4: A Practical Journal of Road and Street Construction and Maintenance, July December, 1912 The introduction of hinges in concrete arches to pro vide for unequal settlement is absolutely useless, accord ing to Mr. Luten. If the arch is a solid rib, hinges par allel to each other cannot relieve unequal settlement, and if it is made up of separate ribs, hinged separately at the crown or at the spring lines or both, the presence of the hinges may permit unequal settlement of the ribs and their supporting footings. But these ribs must support columns carrying a solid concrete floor, and any unequal settlement of the footings and ribs will necessarily cause an unequal settlement of the floor slab, which is, of course, incapable of withstanding it. The most useful purpose of a hinge in an arch, according to Mr. Luten, is to locate the thrust line and reduce a complex analysis to a simple calculation through the use of a complicated and expensive device in the actual construction. The use of the hinge in such an arch by an expert designer is rarely justified, he helds, and is an admission of inability to employ the elastic theory to make the necessary analysis of the proper arch ring. 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.