Publisher's Synopsis
Excerpt from Report of Board of Engineers Upon New York and New Jersey Bridge, 1894
It must be remembered that the only stresses in the stiffening truss are those due to moving load. All dead weight being carried directly by the suspenders -to the cables.
While this is the simplest explanation of the duties of the stiffening truss, it does not take into consideration all elements. The downward and upward deflection of the stiffening truss must be accompanied by corresponding changes in the shapes of the cables, but as these changes are in the direction in which the cables would move if no stiffening truss existed, it follows that the weight is not distributed equally among all the suspenders and the stiffening truss is relieved of resisting so much inequality as is taken by the cables. The elongation of the suspenders is also a slight element of disturbance, but not sufficient to be described here; an analysis of it will be found in Appendix E.
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