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 32
the above example we have for convenience called forces to the right, and upwards,and moments tending to produce rotation with the hands of a watch, />osiihe; and those inthe opposite directions, negative. The opposite convention would do as well, the only thingnecessary being to introduce…
