Manual Of Railway Engineering In Ireland; With Appendices, Including The Irish Tramways Acts

Paperback | May 14, 2012

byCharles Philip Cotton

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1861 Excerpt: ...dwarf wall. For any greater height than h a saving is effected by the introduction of dwarf walls. Rivers, streams, accommodation works, and, above all things, mail-roads or public-road bridges, must be considered when marking the gradients, the efficient drainage of the latter, if under the railway, being a matter of primary importance. If the country be uneven, the cross sections will materially influence the quantities of cutting and embankment, and consequently should be plotted before the gradients are laid down. Cross sections are always plotted on a natural scale, that is, the same vertical and horizontal scales, usually 20 feet or 30 feet to one inch. As soon as the height of cutting or embankment has been ascertained a line is drawn showing formation level for a double line, and the slopes drawn in. From the edge of each slope is then set off a particular distance, measured horizontally, depending on the kind of fence to be used, and a mark made to show the boundary of the land required to be purchased. If the line be single, the slopes for the single line should also be plotted. Though the line is intended to be a single line, land is nearly always taken for a double line. Afterwards the width of formation level for the single line, on the side on which it is intended ' to be made, should be marked on the cross sections, and the slopes drawn, and also a line marking the separation between rock and clay, if rock be shown by the borings. The road sections should also be plotted before the gradients are fixed: they are usually drawn to a scale of 20 feet to one inch vertically, and 100 feet to one inch horizontally. Wherever stations occur, a horizontal portion, if possible, should be provided of, at the least, 700 feet, but the longer the better. Ce...

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1861 Excerpt: ...dwarf wall. For any greater height than h a saving is effected by the introduction of dwarf walls. Rivers, streams, accommodatio...

Format:PaperbackDimensions:32 pages, 9.69 × 7.44 × 0.07 inPublished:May 14, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217863272

ISBN - 13:9780217863278

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