Download ebook Ensamples of Railway Making

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Download ebook Ensamples of Railway Making

Ensamples of Railway Making by John Weale

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Author: John Weale
Number of Pages: 50 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
Type: eBook
ISBN: 9781130835472
File Name: ensamples.of.railway.making.pdf
Download Link: ensamples of railway making
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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. 1843 Excerpt: ...stone, and the backing shall be composed of rough-hammered masonry, well bonded into the face work. For all culverts of 4 feet chord and under the courses shall not be less than 6 inches. For all culverts over 4 feet chord the courses shall not be less than 8 inches. The ends of the abutments to conform to the wings. Arches.--The arches are to be a semicircle in form. For all culverts of 4 feet chord and under the arches shall be 1 foot thick. For all culverts over 4 feet and not greater than 8 feet chord, the arches shall be 1 foot thick. For culverts over 8 feet chord, and for culverts of lesser chord, when placed beneath the pressure of heavy embankments, the arches shall be increased in thickness, as may be directed by the engineer. The thickness of the courses shall not exceed their depth, and in no case, shall they exceed 18 inches. For culverts of 4 feet chord and under no course shall be of a less thickness than 6 inches, measuring on its face. For culverts over 4 feet chord no course shall be of less thickness than 8 inches, measuring on its face. The intrados of the arch to be well hammered to the proper curve. The beds of the arch-stones to be well hammerdressed in the line of radii to the curve. The extrados of the arch to be spalled off tolerably true and even to the line of the curve. The ends of the arches to conform to the wings. The arch-stones to break joints along the length of the culvert. The square drains are to be roofed with flagging, 9 inches thick. Spandrel Backing.--The spandrel backing is to be carried up plumb, 1 foot high above the rear corner of the abutment, for culverts of 4 feet chord and under, and 2 feet high for culverts over 4 feet chord. From thence it shall be carried on a line tangent to the exterior curve of the arc...

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