File:Building and repairing railways - Forming one of the series of the volumes comprised in the Revised and enlarged edition of The science of railways, (1906) (14574535619).jpg

Identifier: buildingrepairin01kirk (find matches)
Title: Building and repairing railways ... : Forming one of the series of the volumes comprised in the Revised and enlarged edition of The science of railways,
Year: 1906 (1900s)
Authors: Kirkman, Marshall M. (Marshall Monroe), 1842-1921
Subjects: Railroads
Publisher: New York and Chicago : The World railway publishing co.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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rrepairs; while on the other hand the stone archculvert and earth embankments while costly toconstruct need but little outlay afterwards forrepairs. But even where the cost of each when capital-ized is the same, the stone arch culvert has thisadvantage, it is usually constructed during timesof financial prosperity and when a financialdepression comes the management has a struc-ture on which but a nominal sum is requiredannually to keep it in repair. Figs. 215, 215a and 215b show the variousparts of an arch culvert, and the terms used todesignate them are as follows: Abutment A, the masonry which rests on thefoundation and affords the support for the springeror skewback and the masonry backing to the arch. Springer B, in a semi-circular arch the lowestor first arch stone. Skewback B, in a segmental arch the top ofthe abutment where it is dressed off on a radialline to receive the first arch stone. Spring Line S, the line formed by the innerlower edge of the springer for a semi-circular
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