[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.