File:The railroad and engineering journal (1887) (14778614603).jpg

Identifier: railroadengineer63newy (find matches)
Title: The railroad and engineering journal
Year: 1887 (1880s)
Authors:
Subjects: Railroad engineering Engineering Railroads
Publisher: New York : M.N. Forney
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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n spanned by the Loa Viaduct is situated inthe upper Andes, at an altitude ot 10,000 ft. above sea-level, ft has been formed through solid rock, probably bythe joint influence of volcanic action and ice-flows. Itssides are precipitous and rugged, and great difficulty wasexperienced in selecting a practicable point of crossing forthe railroad. Some idea of the character of the groundmay be formed from the fact that it was considered verygood work tor any of the surveying party to cross thecafion in two hours. There is no available path up thecanon ; consequently all materials used in the constructionof the viaduct had to be delivered on the seaward abut-ment, and the whole of the ironwork for the piers had tobe lowered into the gorge. The work of locating the railroad and selecting the pointof crossing was undertaken by Mr. Josiah Harding, whowas at that time the Engineer of the railroad in Bolivia.To Mr. Harding is also due the credit of proposing the 266 THE RAILROAD AND (June, 1889.
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O 03 Q< ODi _! << <OOb.OHZ u OS u Q< Vol. LXIII, No. (1.J ENGINEERING JOURNAL. 267 general character of the structure, and fixing the positionsot the piers. After the main features of the proposed viaduct had beensubmitted by Mr. Harding to Mr. Woods, and approvedby him as Consulting Engineer to the railroad company,Mr. Harding returned to Bolivia, and took charge of thenecessary masonry work for the foundations of the piersand the abutments. This work was executed in anticipa-tion of the arrival of the ironwork from England, and it issatisfactory to know that when the viaduct was erectedthere was not the slightest adjustment required in thefoundations or the ironwork. After approval of the general character of the proposedviaduct, Mr. Woods undertook the responsibility of mak-ing the necessary calculations and designing the details, awork of no small magnitude. In the absence of trustworthy data as to the force of thewind during hurricanes, which some

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