Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 539
tform of the bridge is suspended from cables,or chains, the ends of which are securely anchored within the natural or arti-ficial abutments. The curve of a suspended chain is that known as the catenary, and, if thewhole weight of the structure were in the chain itself, this would be the curveof the… … Fig. 1247. ENGINEERING DRAWING. 523 Let Fig. 1248 represent a suspension-bridge, in which A, B, 0, are points ina parabolic curve. Rule.—Add together four times the square of the deflection (E B) and thesquare of half-span (A E), and take the square root of this sum; multiply this C E A .-^T V KI _…
Mechanical drawing
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