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 63
get eq. (6)/thus showing that the maximum bending moments due to a single moving load are the same as for twice that load whenuniformly distributed over the beam. / For two equal loads a fixed distance apart, Fig. 74, the bending moment under the lefthand load, P^, for example, is found by adding…