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 67
-nd—l-FiG. 82. To the left of C are m — \ loads md whose average lever-arm about C = —. The bending moment at C is therefore M = R,X md — (m — l)pd X ^ = ^^^^ md — ^—(m — \)m = ^—(mm\ Q. E. Do 2 2 2 2 69. Web Stresses, Parallel Chords.—If AB, Fig. 83, be a truss with parallel chords,the stress in… … Fig. 83. ^ vert. comp. of the forces acting upon the portion to the left of the section, equal to zero.The sum of the vertical components of the external forces is, as in the case of a beam, calledthe shear, and must be balanced by the vertical components of the stresses in the memberscut; whence…
