Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

184 MOLESWORTH’S POCKET-BOOK Suspension Bridges. V = Versed sine of curve or deflection in feet. C = Chord or span in feet. L — Load in tons distributed, including weight of bridge. x = Distance of any point from centre of curve. h - Height of chain at x above centre of chain. S = Strain on chain in centre in tons. ® ~ strain on ditto, at any point distant x from centre of span. N = Number of tension rods. A = Angle of tangent of chain with horizon at any point x. , Vxz2 /? ......... • . -»•» «C>! Ton A =iY Q C Ij (’ s=sV-________ s' — S (%— j + 1 s, secant A. 0 V = 13generally- v= V[(H)2-(iO)‘2]xT75. Strain on any tension rod — • I = Length of chain = 2^/(5 C)2 + | V2.