On the theory and calculation of continuous bridges (1876)
Merriman, Mansfield, 1848-1925, Making of America Project · New York, D. Van Nostrand · leaf 25
20 … 21 Each of the squares composing thistriangle represents one of the supports,and its left hand division gives the lefthand shear Sn_i, and the right hand onethe shear Sn (Fig. 3). Thus, in the girder of three spans, the triangle showsthat the first support, beginning at theleft, has on the left no…
Bridges · Girders, Continuous
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