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 262
Fig. 266. 60 feet it is the most expensive in first cost of all, due to the fact that it requires moreiron in its construction than any other. Its use is gradually extending to longer spans inspite of the cost. For the longer spans over 75 feet the girders become so very heavy that … Fig. 267. transportation becomes difificult. The longer spans require deep girders for economy in iron,and the necessary web plates can only be obtained in short lengths, making frequent websolices necessary, thus adding weight and increasing cost. It is always preferable to have plate
