[Download] "Scientific American Supplement, No. 484, April 11, 1885" by Various Authors # eBook PDF Kindle ePub Free
eBook details
- Title: Scientific American Supplement, No. 484, April 11, 1885
- Author : Various Authors
- Release Date : January 01, 2012
- Genre: Antiques & Collectibles,Books,Lifestyle & Home,
- Pages : * pages
- Size : 1385 KB
Description
This viaduct is built over a rocky ravine on the railway from Port Alfred to Grahamstown, at a height of about 200 ft. from the bottom. Its length is 480 ft. 6 in. , and the width of the platform is 15 ft. , the gauge of the railway being 3 ft. 6 in. The central span of the viaduct is an arch of 220 ft. span between abutments, and about 90 ft. height; the remainder of the space on each side is divided into two spans by an iron pier at a distance of 68 ft. from the retaining wall.
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