Iron Truss Bridges for Railroads: Methods of Calculating Strains, with a Comparison of the Most Prominent Truss Bridges, and New Formulas for Bridge Computations

D. Van Nostrand, 1870 - 130 páginas

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Página 62 - The strains on the ties are equal to the portions of the weight that travels by each, multiplied by the secant of the angle of inclination with the vertical.
Página 126 - ... where n = 2, in very long pillars ; but in shorter ones the value of n will be reduced to any degree, or so that n = o, or that ?* = a constant, in very short columns ; showing the weakness of wrought-iron to sustain compression, and its unsuitableness for pillars.

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