The theory and practice of modern framed structures : designed for the use of schools, and for engineers in professional practice (1897)
Johnson, J. B. (John Butler), 1850-1902, Bryan, C. W. (Charles Walter), 1863-1927, Turneaure, Frederick Eugene, 1886- · New York : J. Wiley & Sons · leaf 187
Fig. 213. being composed of flat wrought-iron bars. Fig. 214 is a view of one half of the Niagara bridgeas it was originally constructed, the span being 821 feet. Diagonal stay-cables are introduced. … Fig. 214. and the trusses are exceptionally strong, having a height of 18 feet out to out. The sag ofone cable is 54 feet, and of the other 64 feet ; each is composed of 3640 No. 9 iron wires.* When the suspension-cables are made of a high-grade steel wire having an average ulti-mate strength of…
